I have a 2000 Cherokee Sport...doing this same thing, I pulled the engine....This NOISE is from the Wrist pin..............SORRY TO BE THE BEARER OF BAD NEWS !!!! The Engine WILL BLOW
Our Jeep 2001 sounds exactly like yours!!!!We just changed the oil and oil filter (10W30) it was ok, and next day when we start the engine we heard a loud ticking noise. When accelerating and reach approximately approx. 50 miles/hour the noise is less noticeable.The noise is louder when the engine is cold and it is less noticeable with warm engine and hires speed. Do you have find out what caused that or any idea what that can be or caused that noise? Your help is greatly appreciated. Thank you
Did you actually resolve this? It sounds like a leaky exhaust manifold or gasket. I'm familiar with the sound. You can hear it puffing a bit. It's also consistent with your observation that the sound comes from the manifold area.
sounds like my jeep so after I pulled the moter I had 3 piston broken and 3 had small cracks so new piston's same rings thou ran just like new still driveing it been over a year now
your piston skirt broke just fixed mine its exactly what happend to me remove the injectors one at a time and youll know wich one it is but only one at a time waiting will damage the cylinder it will cost two hundred dollars and you need to find the piston letter of the one thats broken to order it it is on the side of the block its not hard to change if you have someone whos in mechanics or you can do it yourself but will run fine untill it blows up otherwise
since all of u seem like u kno wut ur talking about ......ive had a lower end knock in my car since i bought it not as loud as this one....anyways someone told me i had spun a bearing...but since i have been driving it for like 20 000 miles i rly doubt it....i thought the motor would go to complete shit after around 1000 miles
I have a 4.0 inline 6 with a very similar situation. Revved up to around 1800-2000 rpms and the knock can go away.
I pulled off the oil pan, only to find that I had a broken piston skirt (the lower end of the piston) and the knock is coming from a rod hitting.
I have power and the car still runs and drives great (beside that sound, and the fact that if you drive it more without fixing the piston, then you end up throwing the rod)
The description you give about where the sound seems same
I have a 4.0 inline 6 with a very similar situation. Revved up to around 1800-2000 rpms and the knock can go away.
I pulled off the oil pan, only to find that I had a broken piston skirt (the lower end of the piston) and the knock is coming from a rod hitting.
I have power and the car still runs and drives great (beside that sound, and the fact that if you drive it more without fixing the piston, then you end up throwing the rod)
The description you give about where the sound seems same.
Sounds like it had the problem the one I bought had. I bought an 02 durango with a 4.7 L engine in it making that noise (bought it reduced for that reason). Pulled it apart and found that part of a piston had broken off. It had already been ejected, but it spun and pretty much ate the bearing. I have pictures of it. The sound you are hearing is probably the connecting rod hitting the crank because of a lost bearing. I imagine they use the same or similar pistons for the 4L.
@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
@lshorty602487 Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
@lshorty602487 mine does have a noticeble knock at idle but as soon as it warms up it disappear .my engine has 202.000. kilometers .hope it won t get worse..
I found it was the Wrist Pin...the pin actually (rod) slaps back and forth against the piston. When you dismantle the engine, take the cylinder head off, you can move the piston from side to side in the bore. All other piston are firmly in place and cannot be moved. This was a major problem with the 2001 Jeep models with the 4.0L 6cyl.
either rod or valve lifter knock, either way its metal banging metal and will eventually fail or get worse. the knock probably goes out when you hit higher revs only because it becomes so frequent you cannot determine knock vs. noise, its still knocking, just cant hear it at that frequency
I have a 4.7 V8 jeep but its making the same noise. not as loud tho....I think its gunk build up in the oil pump. Mine has been sitting for two years with the timing cover off. I pulled the valve covers and i found 5 loose rocker arms. said to be caused by low oil pressure. Anybody know how to clean the oil pump without having to pull it. maybe a treatment ? please let me know
I have a 4.7 V8 jeep but its making the same noise. not as loud tho....I think its gunk build up in the oil pump. Mine has been sitting for two years with the timing cover off. I pulled the valve covers and i found 5 loose rocker arms. said to be caused by low oil pressure. Anybody know how to clean the oil pump without having to pull it. maybe a treatment ? please let me know
What happens next...my 98 jeep wrangler sport 4.0 did the same thing. As I was driving to the garage, something came a loose, perhaps, piston and engine blew up. (white smoke pouring out of the back) I assure you, you don't won't to reve it up as much or drive it further than you have to. Unless you have tools to work on hydro lifters and linkages, get it to the garage. They may be able to salvage your engine. I am now having to change my engine..best wishes.
What happens next...my 98 jeep wrangler sport 4.0 didthe same thing. As I was driving to the garage, something came a loose, perhaps, piston and engine blew up. I assure you, you don't won't to reve it up as much or drive it further than you have to. Unless you have tools to work on hydro lifters and linkages, get it t the garage. They may be able to salvage your engine. I am now having to change my engine..best wishes.
the sound like hydro lifter, I have same problem 8 months ago and I replace the hydrolic lifter all new hydrolic lifter, till now no problem. remove the engine cover and you C the hydrolic lifter...change everything so make balance
WHAT I WOULD SUGGEST IS GO OUT AND BUY A BMW 325 LIKE ME! NEVER LOOKED BACK. THANKS FOR ALL YOUR COMMENTS THO :p JUST WISH PEOPLE WOULD READ PREVIOUS COMMENTS BEFORE ADDING A "I KNOW WHAT ITS IS" SMART BOLLOX LINE.
WHAT WE DONE TO FIND THIS OUT WAS, WE TOOK THE SUMP OFF, AND IN THE SUMP WAS SMALL METALLIC BITS OF BASTARD METAL. THIS = BROKEN JEEP SELL IT FAST TO A MECHANIC OR SOMEONE THAT WANTED TO TAKE THE WORK ON.
BRILLIANT! I THE NOW EX OWNER OF THIS JEEP DID FIND OUT WHAT IT WAS, AS I HAVE STATED IN THE PREVIOUS COMMENTS! ALTH THE COMMENTS ON THIS VIDEO ARE LIMITED, PEOPLE STILL INSIST ON NOT CHECKING ALL OF THEM WHEN THEY ARE LOOKING FOR THE CAUSE OF THE NOISE ON THERE OWN JEEP. THIS LEADS ME TO THINK THESE SAID PEOPLE ARE NOT LOOKING TO HARD INTO THERE OWN ISSUE TO NOT CHECK ALL THE COMMENTS. HERE IT IS PROBABLY NOT FOR THE LAST TIME
! IT WAS A BROKEN PISTON SHIRT! IN THE 6TH CYLINDER.
my 98 zj has that same exact thing and as the engine warms up it gets quiter but is still there, i took it to a mechanic friend of mine who said it was one of the lifters and he said that the engine could blow a piston today or in a couple years, so im taking my chances
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
that's your lifters one is stuck and push rod is hitting the bottom the higher the RPMs the more oil you put around that lifter there are some products out there that you can try but it best to replace them and if was a piston you would have a lope in the engine check the lifters if you busted a piston you would know it that not that load
that's your lifters one is stuck and push rod is hitting the bottom the higher the RPMs the more oil you put around that lifter there are some products out there that you can try but it best to replace them
That's the "Wrist" Pin in cyl #2 slapping back and forth (in mine it was). I took the whole motor out, gonna try and just replace the piston, wrist pin and rod/bearing. Sux!
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
I've had this happen twice, once it was a king pin. The second time it turned out that one of the wires came loose and was rubbing up against a moving part.
Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
This type doesnt have a time chain. It is just gear only. I pulled my engine due to the same knock and it is a king pin. Marvel mystry oil is a joke and dont wast your time. Sure did fool me. I thought for sure it was a lifter. Which i also found when breaking it down you half to remove the whole head to change lifters. Might as well do a complete rebuild if you have lots of miles. My motor just had 255k. Jeep is getting a new heart and hope to last me 225k more
It's valve train related, because it's making the noise twice as fast as each cylinder is firing, since the valvetrain itself operates at twice crankshaft speed. I would suspect a lifter, rocker arm or maybe timing chain issue.
I agree with the conclusion - i.e. lifter, rocker, timimg chain - but the camshaft rotates at half the speed of the crankshaft. The noise is slower than the crankshaft speed which is around 10 revs per second (600 RPM idle)
no problem - i just need to figure out what's going on with my jeep - it makes a very similar sound but have read all kinds of posts and listened to a number of videos. one video had a noise similar to this and was found to be a broken piston skirt?
I hope not mate! I just ran here down the road for ten minutes got up to 40mph and the noise started to ease up! now its only making half the noise it was before!!
I've almost had enough of this, im hearing banging in the night now! slowly going mad.
i have exactly the same noise on my 2000 grand cherokee 4.0 - as far as i can tell from the video. i have removed the valve cover and inspected rocker arms etc. and all looked fine. i'm interested if you've discovered the cause.
@stuy2coats12345... Was it your Lifters? I own a 1991 Jeep Cherokee and when it worms up it ticks because i have a lifter. But when i start it up when its cold it does not do it.
I've just ran it down the road for ten minutes and the noise has eased up by 50%. this noise is making no sense to me. also when i get up to 40 MPH the noise goes away almost. just leaving a little rattle.
Well its now only producing half the noise it was before so any answers!!?
I have a 2000 Cherokee Sport...doing this same thing, I pulled the engine....This NOISE is from the Wrist pin..............SORRY TO BE THE BEARER OF BAD NEWS !!!! The Engine WILL BLOW
jemaguy 2 weeks ago
Our Jeep 2001 sounds exactly like yours!!!!We just changed the oil and oil filter (10W30) it was ok, and next day when we start the engine we heard a loud ticking noise. When accelerating and reach approximately approx. 50 miles/hour the noise is less noticeable.The noise is louder when the engine is cold and it is less noticeable with warm engine and hires speed. Do you have find out what caused that or any idea what that can be or caused that noise? Your help is greatly appreciated. Thank you
vipalffy 3 weeks ago
I had a sound like this in my 98 grand Cherokee, it ended up being the water pump hitting something. Maybe that?
mikemaz420 1 month ago
Did you actually resolve this? It sounds like a leaky exhaust manifold or gasket. I'm familiar with the sound. You can hear it puffing a bit. It's also consistent with your observation that the sound comes from the manifold area.
AnOm75 2 months ago
Bad lifter
TheLonetreecreations 2 months ago
sounds like my jeep so after I pulled the moter I had 3 piston broken and 3 had small cracks so new piston's same rings thou ran just like new still driveing it been over a year now
mrnashjr1 2 months ago
Sounds like a manifold leak.
pbartolomeo05 2 months ago
bad hydraulic lifter
MikeM8891 2 months ago
sounds like a bad lifter to me
jakenos87 2 months ago
My friend this sound is a piston broken neet be reemplace at ones
ddgeo 3 months ago
IMHO either timing belt slap or a bad piston.
dunno414 3 months ago
sounds like a misfire... my car would make this but i went through and changed the spark plugs AND wires. then ran like a champ :)
9393DJCobra 3 months ago
A piston skirt noise will not go away after warm up. Most likely it is your pressure plate. (youtube it)
liftedJ33P 4 months ago
your piston skirt broke just fixed mine its exactly what happend to me remove the injectors one at a time and youll know wich one it is but only one at a time waiting will damage the cylinder it will cost two hundred dollars and you need to find the piston letter of the one thats broken to order it it is on the side of the block its not hard to change if you have someone whos in mechanics or you can do it yourself but will run fine untill it blows up otherwise
TheIcemann33 4 months ago
lifters.
reskuis 5 months ago
i just had the same problem with mine, it was the water pump, trust me. it will run the same temp, but the bearings are goin out on the pump
anthonysakai 5 months ago
since all of u seem like u kno wut ur talking about ......ive had a lower end knock in my car since i bought it not as loud as this one....anyways someone told me i had spun a bearing...but since i have been driving it for like 20 000 miles i rly doubt it....i thought the motor would go to complete shit after around 1000 miles
pewpscoop 5 months ago
Can you replace the piston skirt? I have the same jeep doing the same shit is it fixable or a throw away
swisherTV559 7 months ago
Broken Piston Skirt.
I had the same problem.
Mine drives good and strong too.
Keep driving it, and the rod will go.
zacharyzooshorion 8 months ago
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I have a 4.0 inline 6 with a very similar situation. Revved up to around 1800-2000 rpms and the knock can go away.
I pulled off the oil pan, only to find that I had a broken piston skirt (the lower end of the piston) and the knock is coming from a rod hitting.
I have power and the car still runs and drives great (beside that sound, and the fact that if you drive it more without fixing the piston, then you end up throwing the rod)
The description you give about where the sound seems same
zacharyzooshorion 8 months ago
I have a 4.0 inline 6 with a very similar situation. Revved up to around 1800-2000 rpms and the knock can go away.
I pulled off the oil pan, only to find that I had a broken piston skirt (the lower end of the piston) and the knock is coming from a rod hitting.
I have power and the car still runs and drives great (beside that sound, and the fact that if you drive it more without fixing the piston, then you end up throwing the rod)
The description you give about where the sound seems same.
zacharyzooshorion 8 months ago
Sounds like it had the problem the one I bought had. I bought an 02 durango with a 4.7 L engine in it making that noise (bought it reduced for that reason). Pulled it apart and found that part of a piston had broken off. It had already been ejected, but it spun and pretty much ate the bearing. I have pictures of it. The sound you are hearing is probably the connecting rod hitting the crank because of a lost bearing. I imagine they use the same or similar pistons for the 4L.
Diallo268 8 months ago
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@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
stu2coats 9 months ago
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@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
stu2coats 9 months ago
@StrainingDingelberry Dont put a water pump on untill you take off the front belt! When you take off the belt, if the knocking is the water pump, the noise should go away!
stu2coats 9 months ago
My xj does it. It just started doing it one day. I'm putting a water pump on I think that's why mines doing it but mines not quite as loud as urs
StrainingDingelberry 9 months ago
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
stu2coats 10 months ago
@stu2coats what does that mean and how do you fix it?
blacksslumina 9 months ago
could be a cracked flexplate this is very common with this motor.
lshorty602487 10 months ago
@lshorty602487 Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
stu2coats 10 months ago
@lshorty602487 mine does have a noticeble knock at idle but as soon as it warms up it disappear .my engine has 202.000. kilometers .hope it won t get worse..
swett1969 9 months ago
This has been flagged as spam show
I found it was the Wrist Pin...the pin actually (rod) slaps back and forth against the piston. When you dismantle the engine, take the cylinder head off, you can move the piston from side to side in the bore. All other piston are firmly in place and cannot be moved. This was a major problem with the 2001 Jeep models with the 4.0L 6cyl.
JeepCrazyMe 11 months ago
either rod or valve lifter knock, either way its metal banging metal and will eventually fail or get worse. the knock probably goes out when you hit higher revs only because it becomes so frequent you cannot determine knock vs. noise, its still knocking, just cant hear it at that frequency
xNSxTY3 11 months ago
time to replace your lifters my 4.0 did that same thing replaced them fine now
amcandy1 11 months ago
I have a 4.7 V8 jeep but its making the same noise. not as loud tho....I think its gunk build up in the oil pump. Mine has been sitting for two years with the timing cover off. I pulled the valve covers and i found 5 loose rocker arms. said to be caused by low oil pressure. Anybody know how to clean the oil pump without having to pull it. maybe a treatment ? please let me know
93lilrock 1 year ago
@93lilrock did you find a way to clean oil pump?
blacksslumina 9 months ago
I have a 4.7 V8 jeep but its making the same noise. not as loud tho....I think its gunk build up in the oil pump. Mine has been sitting for two years with the timing cover off. I pulled the valve covers and i found 5 loose rocker arms. said to be caused by low oil pressure. Anybody know how to clean the oil pump without having to pull it. maybe a treatment ? please let me know
93lilrock 1 year ago
What happens next...my 98 jeep wrangler sport 4.0 did the same thing. As I was driving to the garage, something came a loose, perhaps, piston and engine blew up. (white smoke pouring out of the back) I assure you, you don't won't to reve it up as much or drive it further than you have to. Unless you have tools to work on hydro lifters and linkages, get it to the garage. They may be able to salvage your engine. I am now having to change my engine..best wishes.
Ninety
Ninetyandnine 1 year ago
What happens next...my 98 jeep wrangler sport 4.0 didthe same thing. As I was driving to the garage, something came a loose, perhaps, piston and engine blew up. I assure you, you don't won't to reve it up as much or drive it further than you have to. Unless you have tools to work on hydro lifters and linkages, get it t the garage. They may be able to salvage your engine. I am now having to change my engine..best wishes.
Ninety
Ninetyandnine 1 year ago
the sound like hydro lifter, I have same problem 8 months ago and I replace the hydrolic lifter all new hydrolic lifter, till now no problem. remove the engine cover and you C the hydrolic lifter...change everything so make balance
jameslupas 1 year ago
WHAT I WOULD SUGGEST IS GO OUT AND BUY A BMW 325 LIKE ME! NEVER LOOKED BACK. THANKS FOR ALL YOUR COMMENTS THO :p JUST WISH PEOPLE WOULD READ PREVIOUS COMMENTS BEFORE ADDING A "I KNOW WHAT ITS IS" SMART BOLLOX LINE.
stuy2coats 1 year ago
WHAT WE DONE TO FIND THIS OUT WAS, WE TOOK THE SUMP OFF, AND IN THE SUMP WAS SMALL METALLIC BITS OF BASTARD METAL. THIS = BROKEN JEEP SELL IT FAST TO A MECHANIC OR SOMEONE THAT WANTED TO TAKE THE WORK ON.
stuy2coats 1 year ago
BRILLIANT! I THE NOW EX OWNER OF THIS JEEP DID FIND OUT WHAT IT WAS, AS I HAVE STATED IN THE PREVIOUS COMMENTS! ALTH THE COMMENTS ON THIS VIDEO ARE LIMITED, PEOPLE STILL INSIST ON NOT CHECKING ALL OF THEM WHEN THEY ARE LOOKING FOR THE CAUSE OF THE NOISE ON THERE OWN JEEP. THIS LEADS ME TO THINK THESE SAID PEOPLE ARE NOT LOOKING TO HARD INTO THERE OWN ISSUE TO NOT CHECK ALL THE COMMENTS. HERE IT IS PROBABLY NOT FOR THE LAST TIME
! IT WAS A BROKEN PISTON SHIRT! IN THE 6TH CYLINDER.
stuy2coats 1 year ago
its very comon
doomfever09 1 year ago
ive done a fair few
doomfever09 1 year ago
na man thats definatly a worn cam shaft and lifter
doomfever09 1 year ago
my 98 zj has that same exact thing and as the engine warms up it gets quiter but is still there, i took it to a mechanic friend of mine who said it was one of the lifters and he said that the engine could blow a piston today or in a couple years, so im taking my chances
theemperur 1 year ago
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
stuy2coats 1 year ago
either a you dropped a valve or you need a new oil pump
badman6073 1 year ago
my guess is that it is your fan clutch...look and see if its is loose and bouncing aroudn!!
jolutz3 1 year ago
that's your lifters one is stuck and push rod is hitting the bottom the higher the RPMs the more oil you put around that lifter there are some products out there that you can try but it best to replace them and if was a piston you would have a lope in the engine check the lifters if you busted a piston you would know it that not that load
woodsey453a 1 year ago
that's your lifters one is stuck and push rod is hitting the bottom the higher the RPMs the more oil you put around that lifter there are some products out there that you can try but it best to replace them
woodsey453a 1 year ago
That's the "Wrist" Pin in cyl #2 slapping back and forth (in mine it was). I took the whole motor out, gonna try and just replace the piston, wrist pin and rod/bearing. Sux!
JeepCrazyMe 1 year ago
Right I have found out (at last!) what has been making this knocking sound!! Top points goes to the very helpful people that said it was piston related! 'the piston in CL (6) Had dropped its shirt. Bits of metalic nightmares found in the oil in the sump. There would of been extra points if you also said it was the 'big end' because we have a real Fred Flintstone wonna-bee car here! It couldn't just of died from a piston going, thats not enough! Big end as well.
stuy2coats 1 year ago
i think that this is broken piston
myfa1989 1 year ago
Sounds like it is under the valve cover.... And that sound makes me want to cry.
jschwind435 1 year ago
tengo el mismo problema con mi grand cherokee limited 2001.
el mecanico me dijo que tiene un piston roto,la unica solotion es cambiar el motor oh cambiarle el piston..suerte
raymundito 1 year ago
I've had this happen twice, once it was a king pin. The second time it turned out that one of the wires came loose and was rubbing up against a moving part.
NickPech 1 year ago
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Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
dextro2410 1 year ago
This has been flagged as spam show
Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
dextro2410 1 year ago
This has been flagged as spam show
Youve either got a piston pin knock, ridge noise, rod bearing noise, or tappet noise. Could be more detailled with you if i had more info on the engine.
dextro2410 1 year ago
Comment removed
dextro2410 1 year ago
This type doesnt have a time chain. It is just gear only. I pulled my engine due to the same knock and it is a king pin. Marvel mystry oil is a joke and dont wast your time. Sure did fool me. I thought for sure it was a lifter. Which i also found when breaking it down you half to remove the whole head to change lifters. Might as well do a complete rebuild if you have lots of miles. My motor just had 255k. Jeep is getting a new heart and hope to last me 225k more
jungledrum123 1 year ago
check for cracks on intake valve tubing under manifold
teriberi777 1 year ago
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LOOK AT MY VIDEO OF MY JEEP SOUNDS THE SAME TINSINK21
tinsink21 1 year ago
So did you find the problem? Mine is making the same noise and is driving me crazy.....
bterry0312 1 year ago
@bterry0312
turned out the noise from my jeep 4.0 was a broken/cracked piston skirt. my hunt for an answer is over.
53646453 1 year ago
@53646453 I had the same issue did you rebuild the motor?
watso64 1 year ago
@watso64 i bought a jasper replacement engine and had it installed. engine cost ~$2000
53646453 1 year ago
So what was the problem? I have the same noise on my jeep!
cerezita111 1 year ago
It's valve train related, because it's making the noise twice as fast as each cylinder is firing, since the valvetrain itself operates at twice crankshaft speed. I would suspect a lifter, rocker arm or maybe timing chain issue.
WhoSaidTyler 1 year ago
@WhoSaidTyler
I agree with the conclusion - i.e. lifter, rocker, timimg chain - but the camshaft rotates at half the speed of the crankshaft. The noise is slower than the crankshaft speed which is around 10 revs per second (600 RPM idle)
53646453 1 year ago
@53646453 how in the world did I get that wrong, must have been up too late!. Thanks for the correction...
WhoSaidTyler 1 year ago
@WhoSaidTyler
no problem - i just need to figure out what's going on with my jeep - it makes a very similar sound but have read all kinds of posts and listened to a number of videos. one video had a noise similar to this and was found to be a broken piston skirt?
53646453 1 year ago
Look at the Exhaust manifold. Some times they will click like that when they crack or loosen. Hard to tell by just hearing the vid. Good luck!!
cockand2balls 1 year ago
nomorestalkers*
I hope not mate! I just ran here down the road for ten minutes got up to 40mph and the noise started to ease up! now its only making half the noise it was before!!
I've almost had enough of this, im hearing banging in the night now! slowly going mad.
stuy2coats12345 1 year ago
@stuy2coats12345
i have exactly the same noise on my 2000 grand cherokee 4.0 - as far as i can tell from the video. i have removed the valve cover and inspected rocker arms etc. and all looked fine. i'm interested if you've discovered the cause.
53646453 1 year ago
@stuy2coats12345
i'm thinking it may be the timing chain on my jeep
53646453 1 year ago
@stuy2coats12345... Was it your Lifters? I own a 1991 Jeep Cherokee and when it worms up it ticks because i have a lifter. But when i start it up when its cold it does not do it.
WedidLandONtheMOON 9 months ago
I've just ran it down the road for ten minutes and the noise has eased up by 50%. this noise is making no sense to me. also when i get up to 40 MPH the noise goes away almost. just leaving a little rattle.
Well its now only producing half the noise it was before so any answers!!?
stuy2coats12345 1 year ago
might be spun bearings
nomorestalkers 1 year ago
check to make sure your rockes studs havn't lifted up any. it could mean your lifter is out of place
1339Andrew 1 year ago
Yeah I wish it was the water pump! I've checked that out. no joy there....
Thanks for your input tho. (0:
stuy2coats12345 1 year ago
i think your water pump is about to go out... check for play in your fan.
fventura03 1 year ago
i think your water pump is about to go out...
fventura03 1 year ago
OOOOO nice Engine ;)
laujay1 1 year ago
Also I just wanted to add that when the revs go up to around 2000rpm, the 'knocking' fades out, but not completely.
stuy2coats12345 1 year ago