AEB Valvetrain noise
08-19-2008, 06:09 AM
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AEB Valvetrain noise
I've been battling what sounds like noisy lifters/ low oil pressure for several months now. The noise sounds like its coming from the cam chain tensioner area. It came on slow a while ago and gradually got louder. Basically after the cars been running for about 30 secs I can hear the noise at idle up to about 2k rpm, after that it sounds fine. Now for the good part... I have replaced the bottom end including all bearings gaskets seals, oil pump, oil retaining valve. I have replaced the cam chain tensioner and the lifters on the intake side. I get about 42psi of oil pressure at warm idle.
Has anybody ever heard of anything like this? I pulled the motor last night in a fit of frustration, and am going to take a close look at the clutch area and change the exhaust lifters. The last things I can think of are the actual cam chain, or valve guide wear.
Has anybody ever heard of anything like this? I pulled the motor last night in a fit of frustration, and am going to take a close look at the clutch area and change the exhaust lifters. The last things I can think of are the actual cam chain, or valve guide wear.
08-19-2008, 06:16 AM
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yea Joe's been trouble shooting this one with me for months! Huge thumbs up to him as usual!!
But yea I was gonna mention that mine sounds like a similar situation to yours.
08-19-2008, 06:21 AM
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the whole reason I decided to rebuild was the tapping noise.
we...
replaced the lifters, didn't fix it.
replaced cam chain tensioner, didn't fix it.
replaced oil pump (low pressure), didn't fix it.
rebuilding motor... BETTER FIX IT!!!
replaced the lifters, didn't fix it.
replaced cam chain tensioner, didn't fix it.
replaced oil pump (low pressure), didn't fix it.
rebuilding motor... BETTER FIX IT!!!
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08-19-2008, 06:29 AM
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Valvetrain noise
If you have 42psi, then you are in good shape.
The Noise i had that was kinda loud was on cold start ups. I was getting the 3-4times "clap clap" sound coming from the back of the valve cover(cam tensioner). Well, i got it replaced at 65K miles. The Cam tensioner looked like new, and the chain guide was barely worn.
Now i dont get the LOUD (clap clap sound) With 20valves so close spaced, and with high mileage, you gonna have valve train noice(no way around that).....I have not heard of a quiet 1.8t valve train.
How about using a thicker oil? I have used the castrol syn 5w-50 one time and the valve train GOT quiet belive it or not...
The Noise i had that was kinda loud was on cold start ups. I was getting the 3-4times "clap clap" sound coming from the back of the valve cover(cam tensioner). Well, i got it replaced at 65K miles. The Cam tensioner looked like new, and the chain guide was barely worn.
Now i dont get the LOUD (clap clap sound) With 20valves so close spaced, and with high mileage, you gonna have valve train noice(no way around that).....I have not heard of a quiet 1.8t valve train.
How about using a thicker oil? I have used the castrol syn 5w-50 one time and the valve train GOT quiet belive it or not...
08-19-2008, 06:32 AM
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I am currently running 20w50. I have been through a bunch of aeb's and am pretty sure
that this is not the normal high milage noise. I know the noise your talking about this just seems much louder. I have had low oil pressure motors that are quieter than this one...