noisy rockers normal
Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
noisy rockers normal
Following recent cam install,new lifters and the fitting of new comp self align roller tips,its really rattly under the tappet covers,lot more noticeable than previously.
Is this normal?
Is this normal?
Race Director
Joined: Nov 2003
Posts: 12,222
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From: Overland Park Kansas
2020 Corvette of the Year Finalist (appearance mods)
C4 of Year Winner (appearance mods) 2019
Yeah. Best explanation I can give is their may be less control over the cam nose than before. What's the cam/spring combo?
If you replaced exhaust gaskets, that can also cause noise -- if not properly sealed.
If you replaced exhaust gaskets, that can also cause noise -- if not properly sealed.
Drifting
Joined: May 2010
Posts: 1,990
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From: Gaithersburg MD A member since 2007 but then the computer crashed and then the car crash loss of memory X 2
Might weant to just double check bolts and nuts.
They sometimes have a tendency to become a little loose as things settle in.
They sometimes have a tendency to become a little loose as things settle in.
Le Mans Master
Joined: Aug 2007
Posts: 8,735
Likes: 414
From: WV
When my motor was new there wasn't as much noise as there is now and I believe with my motor the parts wearing in is causing some of the noise..I adjusted the rockers but the clatter is still there. Its not real loud but like mentioned above it sounds like a loud sewing machine..WW
Last edited by WW7; Jan 21, 2011 at 08:54 AM.
Race Director
Joined: Apr 2003
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From: moraga ca
Might want to pop the valve covers off and make sure the rockers aren't contacting the underside of the covers. I know my Crane rockers made some contact in the past and the covers needed to be clearanced. Never hurts to check.
Le Mans Master
Joined: Jul 2007
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From: Tampa Florida
Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
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Thread Starter
Racer
Joined: Sep 2005
Posts: 449
Likes: 1
From: Victoria
Even with the correct geometry & preload it is normal to have a little more noise than with the "stock" rockers in place. As mentioned it is a really good idea to pull the covers and check the valve related components for obvious visual issues after the first 500 to 1000 miles of use/break in. Experimenting with a bit more +/- preload may prove to make things quieter under the hood. If you had a significant issue your rocker "noise" will show up as excessive "knock" counts on/in the ECM/PCM when the engine is pushed hard.
Got to learn how to use this tech one I purchase
,Is knock counts related to poor fuel as well?
