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Old 03-13-2006, 06:50 PM
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cam and lifter chatter

Hello I have installed an extreme engery comp cams kit. I now have a chatter
noise comeing from the lifters, I have checked and found that this problem exist in some engines, does enybody know how to correct this problem ?
Yhe cam is a 12-246-3 and is a 490 lift. the cam and lifters came as a kit and should work together. My motor is a 350 Chevy

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Old 03-13-2006, 07:52 PM
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There's probably nothing wrong with the lifters you have. The profile of the Extreme Energy lobes is very steep so it's very difficult to keep the valvetrain quiet when everything's moving so much faster.

You could try try some "zero lash" lifters from Comp Cams, they actually specify a few thousandths of preload. They might be somewhat quieter than normal lifters, or you could just enjoy the symphony.

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Old 03-13-2006, 08:14 PM
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noise lifters

Thank you Larry for your reply:
I called Comp cams and I do have the zero lash lifters. the garage that built the motor and installed the new cam and lifters said that I might have a air gap in the oil system because this is the second cam with a problem.
Comp cams thinks is becouse of the preload and needed to be adjusted by having the lifters rotated five times to get the lash/oil at the proper pressure
for the adjustment? I will take it to the garage this week so they can play at my ex pence. Again thank you.
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