Squeaking noise
08-14-2011, 12:56 AM
#1
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Squeaking noise Hey guys, I just recently finished my s10 swap and now the engine is making a squeaking noise. It is a 2007 4.8 LR4 from a chevy express. It was running fine, the squeak started after I did a 1st-3rd wot pull. The engine still runs great, has around 55psi of oil pressure at idle. It just now has this constant squeak. Maybe you guys can help me out. I am really hoping it is not a bearing.
So far I have removed the belt with no change with the sound. Gonna try to get my hands on a stethoscope tomorrow and see what I can find. Here are a couple vids of the sound.
http://www.youtube.com/watch?v=jD_YSNAuJnI
http://www.youtube.com/watch?v=K3f4mncJTzM
So far I have removed the belt with no change with the sound. Gonna try to get my hands on a stethoscope tomorrow and see what I can find. Here are a couple vids of the sound.
http://www.youtube.com/watch?v=jD_YSNAuJnI
http://www.youtube.com/watch?v=K3f4mncJTzM
08-14-2011, 10:55 AM
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Staging Lane
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You can see in the second video I have the belt removed. I am thinking it is something in the valvetrain. Think I'm just gonna pull the heads and see what I find.
08-14-2011, 06:00 PM
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08-14-2011, 09:08 PM
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Last time I heard that noise it was a rod bearing spun. Somebody else's engine, not mine. He ran (insert popular synthetic oil brand here) 5W-30 on a road course event in the middle of Summer, no oil cooler, 40 minute sessions on a nearly 2 mile course.
By the 3rd session it had that squeal, we drained the oil in the pit garage and it was full of bearing glitter.
Good luck dude.
By the 3rd session it had that squeal, we drained the oil in the pit garage and it was full of bearing glitter.
Good luck dude.
08-15-2011, 12:58 AM
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Well the cam is a low mileage 02+ Ls6 cam that I just installed. The lifters are stock with 120k miles on them. Everything was working great until that 1st-3rd pull. I ended up pulling the motor out tonight, easier to work on it with it on an engine stand. I am gonna tear into it tomorrow after work and see what I find.
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08-15-2011, 01:01 AM
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Last time I heard that noise it was a rod bearing spun. Somebody else's engine, not mine. He ran (insert popular synthetic oil brand here) 5W-30 on a road course event in the middle of Summer, no oil cooler, 40 minute sessions on a nearly 2 mile course.
By the 3rd session it had that squeal, we drained the oil in the pit garage and it was full of bearing glitter.
Good luck dude.
By the 3rd session it had that squeal, we drained the oil in the pit garage and it was full of bearing glitter.
Good luck dude.
08-24-2011, 09:59 AM
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Yea I didn't want to risk it. I ended up getting another used ls6 cam and new ls7 lifters. Also threw in an ls6 timing chain while I was at it. Should have it running tonight.
