Valve train noise
Thread Starter
Teching In
Joined: Apr 2007
Posts: 46
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From: Sugar Land, Tx
Valve train noise Just put a set of 241 heads and an LS6 cam in my 99. New lifters, push rods and valve springs too.
When I drive normal at freeway speeds its all good. Even when I'm on side streets and running it hard it's good. When I'm at freeway speeds and I run it up when I get out of the gas I can hear valve train noise, more specifically rocker arm tap.
The heads had 20 thousands taken off of them when they were surfaced and I have new 7.400 push rods. I've been told to shim the rockers .015 on the side thats tapping cause the lifters are having a hard time pumping up. Does that sound about right? Any other sugestions? Tips?
When I drive normal at freeway speeds its all good. Even when I'm on side streets and running it hard it's good. When I'm at freeway speeds and I run it up when I get out of the gas I can hear valve train noise, more specifically rocker arm tap.
The heads had 20 thousands taken off of them when they were surfaced and I have new 7.400 push rods. I've been told to shim the rockers .015 on the side thats tapping cause the lifters are having a hard time pumping up. Does that sound about right? Any other sugestions? Tips?
As garygnu suggested, you may find faulty trunion bearings in the rockers as an alternate cause while checking the other valvetrain components.
