Author Topic: Valve noise  (Read 352 times)

Offline dana60

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Valve noise
« on: September 24, 2017 - 11:02:28 pm »
Ok, here goes, I have a purple cam 509, 440 source heads, .028 head gasket, I measured the pushrods for correct length. When I started the engine it sounds like a rattle noise coming from both sides valve  train ? Any ides, or has this happen to anyone?? Thanks


Offline jason340

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Re: Valve noise
« Reply #1 on: September 25, 2017 - 09:57:04 am »
I had a similar problem. I have a 440 with a Comp cam and roller lifters and rockers. I felt I had excessive valve train noise. They were set to Comps specs. Within less than 1k miles three pushrods came out of the adjusters. We solved the problem by getting a new lifter then taking a measurement with the lifter fully compressed (not primed) and fully extended and adjusted the rocker arms half way in the middle. This stopped all of the valve train noise. It wound up at about one and one half turns on the adjuster. Hope this helps.

Offline cudabob496

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Re: Valve noise
« Reply #2 on: September 26, 2017 - 10:40:19 pm »
just a matter of proper valve train adjustment.
Vendor instructions are handy.
72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"