valve train noise due to bad solid roller lifter? - Team Camaro Tech
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post #1 of 35 (permalink) Old Mar 15th, 09, 04:39 PM Thread Starter
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valve train noise due to bad solid roller lifter?

I took the passenger side solid roller lifters out, one of the rollers has two gouges in it - clear to the naked eye/ not deep enough to catch a finger nail. when you roll it you can feel the drag on the roller. it rolls, but there is clearly some drag. could this be responsible for some loud valve train noise that I've had?

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post #2 of 35 (permalink) Old Mar 15th, 09, 04:48 PM
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Re: valve train noise due to bad solid roller lifter?

Yes and check your cam, it probally has a mark also
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post #3 of 35 (permalink) Old Mar 15th, 09, 04:56 PM
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Re: valve train noise due to bad solid roller lifter?

I would say as far as the noise valve train, if its quite when cold but noise when warm then its a matter of adjustments. How loud are you talking.

This is at 180* and its more noticeable with the video then when you stick your head in the engine compartment to listen.

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post #4 of 35 (permalink) Old Mar 15th, 09, 05:04 PM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

I've gone through the valve lash already a few times, so its not due to that... geez, if the cam is damaged too, the motors coming out. I forgot I had a video, below

http://s76.photobucket.com/albums/j3...t=DSCN0023.flv

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post #5 of 35 (permalink) Old Mar 15th, 09, 05:15 PM
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Re: valve train noise due to bad solid roller lifter?

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Originally Posted by SooperDave View Post
I've gone through the valve lash already a few times, so its not due to that... geez, if the cam is damaged too, the motors coming out. I forgot I had a video, below

http://s76.photobucket.com/albums/j3...t=DSCN0023.flv
Dave are you adjusting the lash when the motor is warm?
I can here that noise in your video but it sounds like a upper knock not a tick or a clack.
Do you have a mechanical fuel pump and are you talking the passenger side noise, if so are you sure its not a fuel pump knock?
Just trying to help you out.
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post #6 of 35 (permalink) Old Mar 15th, 09, 05:19 PM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

the lash was done properly. I changed the fuel pump to rule that out too. thx

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post #7 of 35 (permalink) Old Mar 15th, 09, 05:20 PM
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Re: valve train noise due to bad solid roller lifter?

Ok i was listening to the video again and it sounds like a valve spring, push rod or that bad roller rocker.
How did the valve steam look....

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post #8 of 35 (permalink) Old Mar 15th, 09, 05:37 PM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

I don't see any uneven wear on the valve stems. Upon another look, there is some wear on the #8 spring retainers where the rockers might be hitting. And like I said the #6 roller lifters have those gouge marks.

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post #9 of 35 (permalink) Old Mar 15th, 09, 05:44 PM
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Re: valve train noise due to bad solid roller lifter?

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Originally Posted by SooperDave View Post
I don't see any uneven wear on the valve stems. Upon another look, there is some wear on the #8 spring retainers where the rockers might be hitting. And like I said the #6 roller lifters have those gouge marks.
OK im no pro, but it sounds like a couple of easy fixes.
1st the push rod guides need to be adjusted with the geometry of the push rod and the rocker/valve steam.
2nd replace that bad roller rocker and the #8 retainers.
3rd check for any signs of the rocker studs from pulling out.
4th cut open your oil filter and look for any metals.
5th you should be good to go, it sounds like you caught this just in time.

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post #10 of 35 (permalink) Old Mar 15th, 09, 05:58 PM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

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replace that bad roller rocker and the #8 retainers
the roller LIFTER looks worn, not the rocker arms

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post #11 of 35 (permalink) Old Mar 15th, 09, 06:07 PM
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Re: valve train noise due to bad solid roller lifter?

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the roller LIFTER looks worn, not the rocker arms
OOPS MY BAD... How does the lobe look?

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post #12 of 35 (permalink) Old Mar 15th, 09, 06:17 PM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

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OOPS MY BAD... How does the lobe look?
looks fine

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post #13 of 35 (permalink) Old Mar 15th, 09, 06:21 PM
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Re: valve train noise due to bad solid roller lifter?

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looks fine
Then double check the lifter bore for damage and your oil filter for metal and if its all good. Replace the lifter and retainers, also check the push rod guides to make sure they are adjusted and that the push rod is not putting any side to side pressure on the lifter.

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post #14 of 35 (permalink) Old Mar 15th, 09, 06:31 PM
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Re: valve train noise due to bad solid roller lifter?

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Originally Posted by SooperDave View Post
I don't see any uneven wear on the valve stems. Upon another look, there is some wear on the #8 spring retainers where the rockers might be hitting. And like I said the #6 roller lifters have those gouge marks.
Correct the rocker arm to retainer clearance.Anytime the valvetrain trys to go into bind..the weakest link will fail first.The needle bearings in the roller lifters might be flattening out and this is what you are feeling when you spin the roller on the axle by hand.Add the spring load to that and the roller wheel does not freely rotate on the cam lobe.

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post #15 of 35 (permalink) Old Mar 16th, 09, 10:09 AM Thread Starter
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Re: valve train noise due to bad solid roller lifter?

we're going to grind out clearance in the rocker arms, replace the bad roller lifter and pray that the noise goes away

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