 Hey everyone, Shabear1000 here. Today we're going to find the mess on this Corvette. I've already found the mess but I'm going to show you how I found it. We're going to run a compression test if my compression gauge will work. Then we're going to go from there and see what see what might be causing it. But I can tell you it's not spark. I'll tell you why in just a minute. Stick around guys. I'll show you what I did. Okay guys, I did find a dead cylinder in number five. That's one, three, five and then seven. Then over you got two, four, six and eight. What I did was I started up and I pulled, started pulling plug bars off one by one. And they all made a difference except for that one. Now there could be all kinds of things causing that now. I do know it's got spark. I pulled the spark plug out. I actually broke one. So I went over to the toilet at the coma and just got the same exact plugs in it. So I took one out of it and stuck in. Well I stuck this back in, this broken piece and I put the plug in up against that header and it's sparking. So I know it's not a spark issue. But what you do while it's running you pull these off one by one and you'll hear it bogged down. You put it back on it'll come back. When I got to that one it made no change. That's telling me that's a dead cylinder. Now that could be this injector right here. That could be, which I don't think it's anything internal because this engine has no blow by. There's nothing coming out to exhaust. There's you know nothing coming out to valve covers when it's running. So I don't think it's a cracked ring or a cracked piston or a burnt piston. I don't know it could be in the valve system. Could be in the valve train although it's not making any noises. These injectors I put in not too long ago but jeez all I do is move it around here and start it up so but we're going to check that too. But I'll start this up and I'll get you set up and I'll show you exactly how I did that. I did that with these spare pliers and for God's sakes guys make sure you have rubber handle. Even though this is rubber handle I had a spark jump out of the end of this thing so I want to put some black tape on it and I'll pull this off and I'll show you I don't know if you'll be able to hear on the camera but I'll try to get the camera zoomed in down here with the mic so you can hear the difference and the changes. So let me get this started up warmed up and then I'll show you how to do that. Listen real close to the engine. I got that plug wire loosened up so it'll come off real easy and you should hear it change. You hear it bolt down? It makes no change. That's telling me that cylinder is dead. No change at all. So that's our mess and I know it's getting spark on that cylinder but I will get my spark tester and we'll plug it in here and we'll see if it's we'll see if it's lighting up. I have this special stethoscope here and what I'm going to do is I'm going to set this right up against each one of these injectors and see if I can hear it click and I should hear it click click click click. You guys are not going to be able to but I'll be able to hear it if it's clicking so I'm going to check these and if that one's clicking then there could be another issue we'll run a compression test on it. So let's fire this back up. Okay well it's kind of not a good sign it is clicking doesn't mean a spraying fuel but it is clicking but in order to change that one injector I would have to pull all this back off again the intake or the the plenum and the throttle body I'd have to take all that off just to get to the fuel rail to take that one injector out. So I'm going to pull this spark plug out I won't bore you with that and we're going to run a compression test on it. I don't know if this gauge is going to work because it's already sitting on like 60 but hopefully it has more than that so I'm going to go ahead and pull that spark plug out of here and then I'll get this screwed in and I'll show you. Alright guys we're going to watch this gauge already have monkey come out and crank this for me while I watch that gauge it's jumping up to about 200 210 I don't know if that's correct but that's telling me it is getting something what I did was I screwed that in where the spark plug goes I unhooked the battery the wire that goes up to the distributor that says battery I unplugged it you don't want to start well I don't want to start and I got to hold it wide open so you guys watch that and you'll see what I'm talking about it's jumping up but this thing will not hold pressure so I thought I had two I remember Barn went off of her dad and I took it back to him and I don't think that's the one I borrowed so I don't know where it is but watch that gauge wide open throttle okay now I'm gonna play that back make sure you guys seen that but looks like I'm gonna be taking this valve cover off again okay guys so what I'm gonna do is pull that valve cover off there and I'm gonna make sure those two valves are opening all the way if one of them is not opening and there's not a bent rocker arm or a broken rock arm or bent pusher odd then that would be a cam loo now I've got a camshaft in there but the thing of it is it's still in a box and it has a number on it but did he change the cam I don't know I don't know if he put a high-performance cam in and that's the original cam or if that's a high-performance cam he was planning on putting in here it you can't tell I mean it doesn't look like it was used but kind of it does but now the problem with that is it's not I'm worried about how much power because you know we're never really going to race this thing or anything like that we're looking for a cruiser we just want to cruise it the problem with that is if I put that other cam in here and it's not the cam that goes with that box I won't know what to set the valves at so if the intake valve is not opening you know it could be a cam lobe so what I'm saying is I don't know the lifting duration the lift is how far that lobe will open that valve and the duration is how long it keeps it open so like it's an oval it's an egg shape so like if it's like we get that if it's like this it's not going to stay open as long but if it's wider up at the top it's going to stay open longer to let more fuel in so and your lift is how high that lobe is and how high it is determines how far that valve opens if you go too high on it your valve is going to open too high and it's going to hit the top of the piston or well the piston is going to hit the valve and you're going to bend the valve and maybe crack a piston you're going to have problems so if it comes down to where it's a lobe off the cam it doesn't sound like it when it's running usually usually you can hear popping it's not doing that but that's I've seen cam lobes wear off and it doesn't pop you know there's cam lobes worn off on that toyota and it never made any popping noise it was just a miss so if that's the case I would just put another cam in it that I know what it is because I don't want to take that chance and then you're guessing on you know how much you need to adjust the the rocker arms you know just your valves you do that with the rocker arms but I'm going to go ahead if I remember right I know I got to take one of these bolts out here because I can see it coming through it stops it from coming up out I got to take off the alternator wire and then these up here it's pretty easy I'm going to move I'm going to pull the plug wires off moving them out of the way and we'll just go from there and we'll see if there's a problem up here on top I remember I had to adjust one valve it came it came loose but I'm thinking it was one three I'm thinking it was number three and not number five but it could have been number five so it could be something simple like that which I hope it is because if not I got to pull the whole top end of this engine off take the lifters out and everything pull the front of the engine off radiators out the radiator out and the condenser for the air conditioner and all that's got to come out because it's going to have come straight out but if I got to do that I'm putting a P Jackson gear drive timing system in it I want the loud one I want it winding guys like that oh I got the quiet P Jackson in it well really actually all it does guys it's just geared a gear instead of a chain but I like to hear that stuff so what I'll do is all I'll go ahead and record this but I'll speed you up through it and in order to take that bolt out yeah I got to take this back off this came loose one time it was making a little noise and I thought what the hell is that it was this and over do that I got to take the damn belt off and that's kind of a pain so anyway guys let me get everything ready and then we'll start on this oh I also have to unhook the battery because this is a constant ground or constant power so when I take that off that wire is live it should touch you something I'm welding stuff I don't want to weld anything on here hang tight guys okay this is number five now I got to put this hook this battery cable up but first I got to make sure this don't short out now I got to hook the battery cable up we're gonna crank this over and see if these are moving they should go down and up and down so hopefully they are as something else but I think we're down to internals I mean I don't I can't turn that pusher on I can turn that one but let's uh alright now we're going to crank it over watch these two guys and we'll see if they're going up and down and I can't see them from in here very well okay from what I see they look like they were going up and down pretty good so yeah well it's not a cam lobe so that's good but the bad thing is what is it could be a burnt valve or a cracked valve but it's just not popping like they do you know when they when you got a when you got a burnt valve or cracked valve usually they make a popping noise this is the exhaust valve this is the intake valve here nothing's cracked they feel good like I said it wasn't tapping or anything it's just got a mess so could it be a clogged injector yes it could it could be a clogged injector but I hear a pulse and usually usually you won't hear them clicky-clacking if they're clogged I have to do some more research but usually I've had them clog and they won't make a noise and I've took them out cleaned them and then they started clicking again but I wish I had a better compression tester if I had a better compression tester that would really tell me because if it was a cracked or burnt valve you're gonna it's going to leak now the only thing I can do is maybe see if I got a way to put air into this I don't know if I got the right fittings to shoot air into that and see if I can hear them see they're both closed now so that'd be the perfect time to see if I could hear any air leaking up out of there like you'll hear it like you'll hear it coming out the exhaust if it's an exhaust valve or you'll hear it coming out the intake if it's an intake valve you hear that air let me go see what I got okay guys this what I came up with now it's leaking right here but I can squeeze this and put a hundred pound of pressure in there and I can't hear it coming out I've got to throw out a wide open a propped open I can't hear coming out the exhaust or the intake there's a hundred pounds but when I listen I can't hear it coming out the exhaust or the intake so well at least we know it's not at least we know it's not a camshaft but at the same time is it a leaky valve you know if that thing's putting close to 200 psi in it you know compression that could be enough to bypass whatever crack or leak it may have to where 90 to 100 pounds ain't doing it so that's what I'm gonna have to do I'm gonna have to get the right hoses to do a leak down test on it what you do is you as you filled up with pressure you shut your air off you unplug the air and it should stay that way and then then you come back you watch your gauge and you come back a little bit and it shouldn't lose any pressure but yeah I mean I don't know I've never had this issue before usually I can find it in just a few minutes but I'm not sure you know maybe that injector you know maybe it is clogging I don't just maybe not putting enough fuel in it but it's not apparently getting any fuel or something because you know it's just a dead mist it's a dead cylinder and I mean that right there if that was a crack piston or or something you know I'd hear coming out to block somewhere probably up in here you know you would hear you'd hear going down in an oil pan whatever I can't hear any air leaking other than what's right here of course it's hard to tell but usually you can hear them pretty pretty plain so I'm not gonna bore you with this but I'm gonna put this back together and that's about all I can do with it for right now until I can get the right compression tester you know that's going to hold my compression tester is just not I mean it should be on zero right now and it's not so that's probably why it's going up to 210 but it should hold pressure once you put pressure in it and it's not it's not doing that either so I don't know let me get this back together it looks like it's going to rain again so yeah let me get this put back together and then we'll go from there all right guys so I got rained out I got it back together still got a mess you know because we didn't fix anything but I don't know what the problem is I think the first thing I will do is I'll have to go rent a compression tester a good one that way I can do a leak down test on it I don't hear anything but you know that way I can really jack it up 120 psi or whatever and check for a leak down and if there's no leak down then even a few injectors it's clicking it's still you know I don't know maybe it's it's just it's got a clog in it not putting enough fuel in there but it's definitely a dead cylinder I don't think it's mechanical but you know who knows we'll just have to see so we'll get back on it as soon as I can go rent a good compression tester and we'll do a leak down test together on it and then we'll we'll know from there what we're going to do so if it's leaking down then yeah something's you know not sealing right but if it's not then it's got to be a fuel issue like I said I heard you know I could hear it it's clicking like it's supposed to but hell that doesn't mean anything I guess if it's not getting fuel in it could be a clog I don't know we'll see thanks for watching guys appreciate it thanks for spending Saturday afternoon with me yeah I got soaked it really came down really started pouring so I put everything away and then I just went ahead and came back out and finished what I was doing so alright guys she barely meant to manage him gone for now we'll see you guys in the next one thanks for all your well wishes to monkey with her birthday she appreciates it and I appreciate it y'all enjoy the rest of your weekend bye bye and take care