Hello from Greece! Very good video. I d like to ask. I ve seen in my service manual (Honda B18C engine) that the service limit is 81.07mm from std new 81.00-81.02. That means 0.05mm (0.002in) difference from brand new. the limit for your engine is sure so much low as 0.0004? Honda has 5 times bigger limit for wear? Thank you!
the plural of "axis" is "axes", just emphasize the the E lol. you'll thank me later when it comes up in another video ;)
I used to say axis's all the time until I was forced to do a lot of three space multivariate calculus and got tired of stuttering every time I went to describe anything graphical.
Thank you, I'm subscribed by the way. I got a cheap $50 dial bore gauge that's got .0005" reference lines, and I keep getting out of whack up to 0.001" on some cylinders! I know this exceeds the .0004" limit but could a light honing be all that is needed?
@urgeone Yes. So long as it's not deep enough to exceed the piston to cylinder wall clearance spec. Measure the hole, measure the piston. Don't let the difference exceed that spec and it will be like a brand new engine.
If it does exceed that spec, you'd need to replace pistons to fix it, but I don't see a thousandth requiring that. If the pistons are in spec, you should be fine with a light hone and a new set of rings.
hi, i see lot of ur videos, lucking when i was browsing i get to ur videos accidently, iam big fan of watching this kind of videos, from there after i become ur subscriber. I like the way u explain in correct speed, great. I have a question for you if compression of engine is good, will the cylinder bore inspection reveal or not. Do u get to have a chance that compression is good for that cylinder but the cylinder bore inspection result begin failure.
@sivucit No that's not very common. This test is what you do if 1) you can't start the engine and know nothing about its history (like in a junkyard). 2) you have performed a compression test and are trying to determine WHY compression numbers are low on a particular bore.
Often times when a car fails a compression test, you can visibly see the cause. I'm testing a block that never had a cylinder head (when I got it), and really I'm inspecting for machining tolerances as it's getting worked.
This is a great lesson on how to measure cylinder bores and measure taper. For maximum accuracy I would recommend measuring them with the main caps installed and the head still on (or a torque plate). This means you'll be doing the measuring with the block upside-down on an engine stand. There's a lot more to it but this series is a great intro. Excellent audio as well. Keep it up!
@1elAguila Thank YOU! You do some amazing stuff for people who aren't lucky enough to understand me. I've watched your videos and they're fantastic! Hopefully with what you learned here, you can go on to help others.
@michaelovitch Well... that all depends on what the 7-bolt's head looks like. I'm shooting footage for the last of the block series tonight, and then the engine stand is free. I have a 5-day holiday landing on me tomorrow at 5:00 PM so I hope to wrap this up and get the 7-bolt diagnosis underway. That one's not going to be a 9-part series... but the 7-bolt head is already ported. I just hope it's okay.
I have another 7-bolt head that I plan to build, so yes it will happen eventually.
@strange131 You'd be bored to tears watching me fix Macs for 9 hours a day with 2 hours worth of commuting. It's all I can do to work in garage and video editing time. :P
He is blueprinting, or just measuring everything in the engine. I'm sure he'll touch on head measurements. Which may or may not touch one warping. Which may or may not answer your question.
@AllRepair i mean i dont understand why he used the telescoping gauges and then went back and used the dial bore gauge. hence that part being an excercise in telescoping gauge quality.
@lathiat Yep. If you want to use a $10 set of telescoping gauges, you just have to take a Brazilian measurements to make sure they're right. In my case here, one measurement on each bore with the telescoping gauge turned out to produce about a 48-75% rate of error. Using the bore gauge, it's 0% unless you use it wrong... but that's easy enough to test.
I wanted to show that so people know what to expect from these different tools. You definitely get what you pay for.
@lathiat That was ONE feature of this video. I was trying to illustrate how easy it is to screw up with those. The Bore Gague is by far the most accurate and fastest means of inspecting the bores. What I was really showing though... was how to spec out a block and inspect it for wear. These numbers will make more sense after the next video. ;)
@iexploderacoons I would first need a warped head. I don't think I have one, but I WILL be showing how to determine whether or not it's warped.
There are shops out there that can bake a head straight. There's a machine you can straighten cast parts with, and I've seen videos of it on YouTube. I think that's a better option than cutting them smooth because often times after you heat cycle them again with new gaskets and bolts, they return to their original shape. That's bad if you shaved it.
jeff evans is better than you at explaining and he builds 1000hp+ engines
rsxking04 2 weeks ago
@rsxking04 Go watch jeff evans' videos.
Jafromobile 2 weeks ago 2
Hello from Greece! Very good video. I d like to ask. I ve seen in my service manual (Honda B18C engine) that the service limit is 81.07mm from std new 81.00-81.02. That means 0.05mm (0.002in) difference from brand new. the limit for your engine is sure so much low as 0.0004? Honda has 5 times bigger limit for wear? Thank you!
HondaGRST 3 weeks ago
the plural of "axis" is "axes", just emphasize the the E lol. you'll thank me later when it comes up in another video ;)
I used to say axis's all the time until I was forced to do a lot of three space multivariate calculus and got tired of stuttering every time I went to describe anything graphical.
Some good work you're doing there :)
thejfactors 1 month ago
Thank you, I'm subscribed by the way. I got a cheap $50 dial bore gauge that's got .0005" reference lines, and I keep getting out of whack up to 0.001" on some cylinders! I know this exceeds the .0004" limit but could a light honing be all that is needed?
urgeone 2 months ago in playlist More videos from Jafromobile
@urgeone Yes. So long as it's not deep enough to exceed the piston to cylinder wall clearance spec. Measure the hole, measure the piston. Don't let the difference exceed that spec and it will be like a brand new engine.
If it does exceed that spec, you'd need to replace pistons to fix it, but I don't see a thousandth requiring that. If the pistons are in spec, you should be fine with a light hone and a new set of rings.
Jafromobile 2 months ago
so did you just do a light honing job to correct #3, #2 and #1? Or did it need to be heavily honed and/or even bore out?
urgeone 2 months ago in playlist More videos from Jafromobile
hi, i see lot of ur videos, lucking when i was browsing i get to ur videos accidently, iam big fan of watching this kind of videos, from there after i become ur subscriber. I like the way u explain in correct speed, great. I have a question for you if compression of engine is good, will the cylinder bore inspection reveal or not. Do u get to have a chance that compression is good for that cylinder but the cylinder bore inspection result begin failure.
sivucit 2 months ago
@sivucit No that's not very common. This test is what you do if 1) you can't start the engine and know nothing about its history (like in a junkyard). 2) you have performed a compression test and are trying to determine WHY compression numbers are low on a particular bore.
Often times when a car fails a compression test, you can visibly see the cause. I'm testing a block that never had a cylinder head (when I got it), and really I'm inspecting for machining tolerances as it's getting worked.
Jafromobile 2 months ago
I'd be curious to know if your telescoping bore gauges measure more accurately with a micrometer. Calipers are, in my experience, unreliable.
HersheyWC 2 months ago
@HersheyWC Yep. They do. And your experience serves you correctly.
I don't have a 3-4" micrometer. :( Yet. But I'm also getting these holes punched out for forged pistons by someone who does! :D
Jafromobile 2 months ago
Comment removed
pelespoland 1 month ago in playlist Blueprinting
@HersheyWC A micrometer is accurate down to 0.01mm.
Calipers are accurate down to 0.1mm
A ruler is accurate down to 1mm
A tape measure is accurate down to 1cm.
Of total lenght thatis.
Serostern 2 months ago
This is a great lesson on how to measure cylinder bores and measure taper. For maximum accuracy I would recommend measuring them with the main caps installed and the head still on (or a torque plate). This means you'll be doing the measuring with the block upside-down on an engine stand. There's a lot more to it but this series is a great intro. Excellent audio as well. Keep it up!
innocentbystander6 3 months ago
wow this series of video are amazig amigo
learnig something new everyday
thanks
1elAguila 3 months ago
@1elAguila Thank YOU! You do some amazing stuff for people who aren't lucky enough to understand me. I've watched your videos and they're fantastic! Hopefully with what you learned here, you can go on to help others.
Jafromobile 3 months ago
Axiseseseseseses.
jsanchez430 3 months ago
Love it! I just can't wait for the 7 bolt disassemble and diagnosis. Axissss hahaha I lol everytime. Good stuf Jafro!
bradikus7 3 months ago
Head porting this time ?
michaelovitch 3 months ago
@michaelovitch Well... that all depends on what the 7-bolt's head looks like. I'm shooting footage for the last of the block series tonight, and then the engine stand is free. I have a 5-day holiday landing on me tomorrow at 5:00 PM so I hope to wrap this up and get the 7-bolt diagnosis underway. That one's not going to be a 9-part series... but the 7-bolt head is already ported. I just hope it's okay.
I have another 7-bolt head that I plan to build, so yes it will happen eventually.
Jafromobile 3 months ago
@Jafromobile
Ok
Thanks.
curious to see the carnage.
michaelovitch 3 months ago
you should get a ustream live acount. this way we can watch your teachings live, i think that would be a first for any youtuber.
strange131 4 months ago
@strange131 You'd be bored to tears watching me fix Macs for 9 hours a day with 2 hours worth of commuting. It's all I can do to work in garage and video editing time. :P
Jafromobile 3 months ago
He is blueprinting, or just measuring everything in the engine. I'm sure he'll touch on head measurements. Which may or may not touch one warping. Which may or may not answer your question.
Yet again, great video!
theboxmodder 4 months ago
Great stuff as usual jabro :-)
Was this video basically an excercise to test the quality of the telescoping gauges?
lathiat 4 months ago
@lathiat no, hes building this for his sexy 2g. look bad in his videos
AllRepair 4 months ago
@AllRepair i mean i dont understand why he used the telescoping gauges and then went back and used the dial bore gauge. hence that part being an excercise in telescoping gauge quality.
lathiat 4 months ago
@lathiat Yep. If you want to use a $10 set of telescoping gauges, you just have to take a Brazilian measurements to make sure they're right. In my case here, one measurement on each bore with the telescoping gauge turned out to produce about a 48-75% rate of error. Using the bore gauge, it's 0% unless you use it wrong... but that's easy enough to test.
I wanted to show that so people know what to expect from these different tools. You definitely get what you pay for.
Jafromobile 3 months ago
@Jafromobile to check his work.
AllRepair 3 months ago
@lathiat That was ONE feature of this video. I was trying to illustrate how easy it is to screw up with those. The Bore Gague is by far the most accurate and fastest means of inspecting the bores. What I was really showing though... was how to spec out a block and inspect it for wear. These numbers will make more sense after the next video. ;)
Jafromobile 3 months ago
Awesome! Are we going to see any videos in the future of head warp?.
iexploderacoons 4 months ago
@iexploderacoons I would first need a warped head. I don't think I have one, but I WILL be showing how to determine whether or not it's warped.
There are shops out there that can bake a head straight. There's a machine you can straighten cast parts with, and I've seen videos of it on YouTube. I think that's a better option than cutting them smooth because often times after you heat cycle them again with new gaskets and bolts, they return to their original shape. That's bad if you shaved it.
Jafromobile 3 months ago
Lets Make it JafroTV,
MrTurbo4G63T 4 months ago 2