Cooked Rocker Arm? - Team Camaro Tech
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post #1 of 10 (permalink) Old May 27th, 00, 09:42 AM Thread Starter
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I've had this odd mechanical sound coming from the #2 cylinder head location plus some lifter noise. Today I pulled the valve covers to inspect a bit and re-adjust the valves. First, I realized all the valves were set too loose. I could turn the pushrod on every single valve when it was at TDC. When I got to #2 cylinder - the intake rocker and the adjusting nut are cooked! (This pushrod was also loose) They are literally a dark, burnt oil color and have that burnt oil varnish all over. All the other 15 rockers are normal.

I pulled the pushrod and checked it for obstructions that would prevent oil flow but it's clear and the wear on the rocker and pivot ball look fine.

Any ideas?

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Scott
'69 400SB, Richmond 5-speed; '99 HD Road King Classic
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post #2 of 10 (permalink) Old May 27th, 00, 10:49 AM
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Sounds like your stud is bent...

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post #3 of 10 (permalink) Old May 27th, 00, 10:51 AM
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It could be a bad lifter or something stuck in the tiny orifice of the lifter. It could also be what happened to me on a boat motor; the lifter bore (just one) had worn too much and the lifter wasn't getting the pressure it needed to pump oil up (didn't have more than usual clacking as it was a solid-roller set-up). Only way to fix that is to bush the lifter bore. Good luck!!!
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post #4 of 10 (permalink) Old May 27th, 00, 12:37 PM
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Time for a 415....

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post #5 of 10 (permalink) Old May 27th, 00, 12:56 PM Thread Starter
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I pulled another rocker set off and compared the two. The pivot ball from the cooked rocker has a less uniform wear pattern - not significantly different or galled - just not as even. The worst of the varnish is arond the pivot area also. I'm guessing that there was something out of kilter with the inside of the rocker or the pivot and it's been making lots of friction.

Bent stud? Hmm.. I hope not but I suppose that's a possibility too. I put a new rocker on and I'll check it in a couple of weeks. If that one is cooked too then I guess I'll have to change the stud.

Thanks!

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Scott
'69 400SB, Richmond 5-speed; '99 HD Road King Classic
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post #6 of 10 (permalink) Old May 27th, 00, 02:43 PM
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Might be time for a new set of full roller rocker arms. Need very little lubrication.
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post #7 of 10 (permalink) Old May 28th, 00, 12:24 PM
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Sounds like lack of oil as in collasped lifter maybe or like camcojb said lifter bore if your concerned about the stud change it espicially if you have the rocker off it only takes a few more minutes.
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post #8 of 10 (permalink) Old May 29th, 00, 09:29 AM
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Defective HEADS! Time to dump the Edelbrocks and get a set of AFR 215's. Might as well pick up a set of roller rockers at thae same time.


I can hear it now.... "Honey, can I borrow the checkbook?"

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Shawn Peterson
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post #9 of 10 (permalink) Old May 29th, 00, 10:19 AM
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Rockey... I re-read your post. What I saw was "the intake rocker and the adjusting nut are crooked!" You said cooked! I need glasses!!!

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post #10 of 10 (permalink) Old May 30th, 00, 05:17 AM
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Gene
 
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Rock,

Yeah, those Edelbrock heads are trash. You need to step up to the AFRs. Oh, by the way, I would be interested in taking the Edelbrocks off your hands (you know, to use as door stops)

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