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Old 04-09-2013, 04:45 PM
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Ticking sound from Exhaust.

Long story short. Replaced factor rockers with a set of Roller tip cast rockers from comp. While i was in there i noticed that i also had 3 bad lifters. The clips had been broken and are MIA. I replaced with a complete new set of lifters and lots of assembly lube. I didnt pull the cam but i feel good that there was no damage to it. After setting the lifters to zero lash, then a half turn past i called it good. It started good and runs good now. But there is a Ticking noise coming from the dirver side bank. When you turn the motor off you can hear it tick two times before the motor dies. Its not loud at all, and it seems to go away on a rev. I have rechecked the valve lash and its spot on. Im not sure what to do from here. Like i said it runs good. Has a good idle and rev. Any recommendations?

Also forgot to add that the ticking noise can not be heard from the engine compartment. Only from the exhaust and it sounds very similer to a lifter tick to me.

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Old 04-09-2013, 05:00 PM
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Did you know that if you replace all the lifters and not the cam too you need to break them in just as if you'd replaced the cam and lifters togethor. Could be your cam's going flat.
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Old 04-09-2013, 08:43 PM
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Quote:
Originally Posted by RWENUTS View Post
Did you know that if you replace all the lifters and not the cam too you need to break them in just as if you'd replaced the cam and lifters togethor. Could be your cam's going flat.

Yes i did.

BUT i did manged to figure it out. They ways say to start with the simple things. Grabbed a roll of hose and tried to track down where the tick was coming from. Wouldn't you know it, It was the last bolt on the header that was almost fallen out allowing the manifold to leak. Tighten it down and it was fixed.
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Old 04-09-2013, 08:58 PM
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I posted too late as I see you found the problem, as I had explained the way I would have gone through a dial indicator method of tracking down a bad lifter or bad cam lobe.

Last edited by Northern Chevy; 04-09-2013 at 09:03 PM. Reason: The problem was found before my post went up
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