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Doctor, Doctor, give me the news!

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Old 10-22-2012, 05:37 PM
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Tend to agree with AK. When you said shifting at 6800 and noise behind the timing cover I assumed you had the spring tensioner and it had failed. Since you've got the wedge- Keep Digging.

Any abnormal wear on the cam lobes?
Old 10-22-2012, 05:37 PM
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will , I ll drop the oil pan tomorow and see what happens
Old 10-22-2012, 05:38 PM
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Originally Posted by Lucille
Tend to agree with AK. When you said shifting at 6800 and noise behind the timing cover I assumed you had the spring tensioner and it had failed. Since you've got the wedge- Keep Digging.

Any abnormal wear on the cam lobes?

no , all cam lubes look ok to me
Old 10-22-2012, 05:41 PM
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Still on stock pistons?
Old 10-22-2012, 05:44 PM
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You need to be looking at the piston to cylinder wall clearances if you don't have a broken ring land.
Old 10-22-2012, 05:51 PM
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Ditto. You say the pistons were fine , but I'm betting when you pull them out of the cylinder one of the ringlands is broken. Ask me how I know
Old 10-22-2012, 06:13 PM
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Originally Posted by Lucille
Still on stock pistons?
Originally Posted by AKlowriderZ71
You need to be looking at the piston to cylinder wall clearances if you don't have a broken ring land.
Originally Posted by Lucille
Ditto. You say the pistons were fine , but I'm betting when you pull them out of the cylinder one of the ringlands is broken. Ask me how I know
yes stock pistons .

ill pop piston #1 and see what in there
Old 10-22-2012, 06:56 PM
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Hope you find the issue, curious to see what you find.
Old 10-23-2012, 12:33 PM
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Didn't see if you said anything about checking the valve springs. I had a inner spring break on a dual spring and it also made a similar noise, and I didn't find it until after I pulled the heads --- what a waste that was.
Old 10-31-2012, 12:36 AM
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so Im in the market for a 408 rotating assembly with 9.5:1CR any one have anny advice


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