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I’ve posted on this before but it seems like the noise has gotten worse. Ever since my cam install I’ve had a tick/tap/clack coming from cylinder 1, no other part of the motor makes this noise. Every other cylinder sounds great…To try and fix it I have tried multiple sets of lifters, different pushrods and new rockers but the noise is still there. It has become slightly louder and I’m afraid it’s going to become a serious issue. When I pull the valve cover everything is tight, no up and down play in the rockers and everything looks as it should. Could this be an oiling issue? Maybe a blocked oil passage to cylinder 1?! Oil pressure is normal tho… What in the hell is wrong with this car?! I’m ready to give up on it. Here’s a couple videoes from today. The noise does not show up as good in the video as in person. It sounds pretty bad in person and if I had to describe it I would say it sounds like too short of a pushrod, but that’s not the case.
Sometimes an exhaust manifold leak can sound just like a valvetrain tick, and it can get worse over time. Since you have already checked all the valvetrain related causes, I would check into the exhaust manifold leak possibility.
Sometimes an exhaust manifold leak can sound just like a valvetrain tick, and it can get worse over time. Since you have already checked all the valvetrain related causes, I would check into the exhaust manifold leak possibility.
should have added that in the post, I’ve checked throughly for an exhaust leak and it’s definitely internal.
Pulled the valve cover again just to be sure, cannot find any issue at all. I think I’m going to have to run it with the valve cover off to figure out if it’s the intake or exhaust making the noise. Hard to tell without the motor running but just by looks it seems like oil is getting to all the rockers evenly. This is driving me crazy!! The motor would sound so good if it weren’t for this one isolated noise!
Pulled the valve cover again just to be sure, cannot find any issue at all. I think I’m going to have to run it with the valve cover off to figure out if it’s the intake or exhaust making the noise. Hard to tell without the motor running but just by looks it seems like oil is getting to all the rockers evenly. This is driving me crazy!! The motor would sound so good if it weren’t for this one isolated noise!
Sound like a bad pulley, bearing. in that area. Did you rule that out. and by the way we are not my friends anymore.i told you to stay out of here..
P.s start the car and observe that area where you think its a lifter. Don't worry, nothing going to happen. Maybe a little oil if that.
Sound like a bad pulley, bearing. in that area. Did you rule that out. and by the way we are not my friends anymore.i told you to stay out of here..
P.s start the car and observe that area where you think its a lifter. Don't worry, nothing going to happen. Maybe a little oil if that.
Man this dame car wont even let you get the oil dirty.
Sound like a bad pulley, bearing. in that area. Did you rule that out. and by the way we are not my friends anymore.i told you to stay out of here..
P.s start the car and observe that area where you think its a lifter. Don't worry, nothing going to happen. Maybe a little oil if that.
Man this dame car wont even let you get the oil dirty.
I know bro and believe me I’d love to be able to having nothing to post about but this damn car hates me and I’m really starting to hate it as well.
Yep I’ve listened closely many times and it’s definitely coming from inside the motor. I’ve been driving it alot and the noise has gotten a little worse so something must be wearing down, but what tho? Everything in the valvetrain has been changed. Sounds too far up top to be a bottom end issue. Maybe a bad lifter bore causing a lifter to not stay pumped up? Bad valve guide? I’ll fire it up with the cover off then and maybe be able to pinpoint something… Here’s the odd thing, when bone stock the car had a very noticeable tick in that it exact same area. Had the lifters and rocker trunnions changed and put on long tubes, the tick was gone. Fast forward to having my cam installed and the tick was back, and very loud. I’ve tried different sets of lifters and literally a completely different valvetrain, noise still there…
Originally Posted by ClothSeats
Could it be caused by excessive clearance in the wrist pin?
Possibly. I was hoping some skilled engine guys would be able to identify the noise. I doesn’t sound like bottom end its very much up top sounding.
Are you sure there are no missing needle bearings in the rockers? My engine made a similar sound, but when I replaced the rocker trunions with the bronze bushing trunion kit from CHE, it went away. It runs very silently now (on the top end, anyway).
Sorry bro, pull the bandaid off, get the tools out and credit card quit messing around. Sorry to give you the bad news. How much sleep did you get last night??
Are you sure there are no missing needle bearings in the rockers? My engine made a similar sound, but when I replaced the rocker trunions with the bronze bushing trunion kit from CHE, it went away. It runs very silently now (on the top end, anyway).
Yes, positive…. Made this noise with stock rockers/che trunnions. Then put a brand new set of stock rockers in with the BTR v2 trunnion kit.
Originally Posted by helga203
Sorry bro, pull the bandaid off, get the tools out and credit card quit messing around. Sorry to give you the bad news. How much sleep did you get last night??
Thats just it, I’ve already spent a ton of money on trying to fix this. I had two different shops pull the motor and tear it down. The last place that had it sent the heads off for a valve job, I got all new valves as well. I don’t know what in the hell is going on with this car. Something was happening in there when the motor was bone stock that chewed up the valve seats, which is the reason I had to have a valve job done. I’m thinking there was more damage done at that time and that’s where this noise is coming from. But where?? Obviously these shops have missed something.
We definitely want to see this noise concern addressed and handled. It is best to speak with your local Chevrolet dealership who can provide expertise guidance. Should you need help connecting with one, simply email us at socialmedia@gm.com.
Yes, positive…. Made this noise with stock rockers/che trunnions. Then put a brand new set of stock rockers in with the BTR v2 trunnion kit.
Thats just it, I’ve already spent a ton of money on trying to fix this. I had two different shops pull the motor and tear it down. The last place that had it sent the heads off for a valve job, I got all new valves as well. I don’t know what in the hell is going on with this car. Something was happening in there when the motor was bone stock that chewed up the valve seats, which is the reason I had to have a valve job done. I’m thinking there was more damage done at that time and that’s where this noise is coming from. But where?? Obviously these shops have missed something.
yes shop miss the obvious. Seems they were throwing ideas but not looking for the root cause
I really feel like this is an issue with the driver side head. There was a noticeable and isolated ticking noise on cylinder one in that exact spot when the motor was bone stock. When the cam went in the shop sent the heads to a machine shop to be looked over because I had some metal shavings in my oil. Machine shop came back and said the valve seats were chewed up and needed a valve job. Fast forward to getting the car buttoned back up and still having excessive noise in that same area, the heads were pulled again and sent off to a different machine shop said the first machine shop screwed up the valve job and had to redo it. They said the valves were not cut at the correct angle or something like that. I’m thinking really strongly about buying a new set of heads and at the same time maybe swapping the cam to something with less aggressive lobes. What do you guys think about that?
Just an off-the-wall question but were the heads reinstalled in the same positions every time they were removed?We spoke before and have almost identical setups so I don't feel like the cam specs are affecting anything as far as the noise goes.
Just an off-the-wall question but were the heads reinstalled in the same positions every time they were removed?We spoke before and have almost identical setups so I don't feel like the cam specs are affecting anything as far as the noise goes.
Hey buddy. I agree I don’t think it’s the cam specs but I was thinking more along the lines of a defective or bad lobe on the cam. That’s unlikely but just a possibility. However, I had a prominent tick in that same spot before the cam ever went in so I highly doubt that’s what it is.
As far as the positioning of the heads, do you mean where they reinstalled on the same sides they came off of? Either way I have no idea… I know the heads were shipped off and then sent back. I guess as far as sides I assume they are not directional and are interchangeable so it’s very possible that the driver side is now on the passenger side and vice versa. I didn’t think of that so if that were the case, then it wouldn’t be the head… but I have no way of knowing. Dang it. This is driving me absolutely insane because with the noise like that you would think the problem would be somewhat obvious. I think I’m just going to have to get the motor nice and hot and then remove the valve cover and start it up and listen really closely with a stethoscope and determine exactly which rocker its coming from.
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Cylinder 1 noise - possible oiling issue?
