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Valve stem worn down

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Old Apr 29, 2021 | 12:52 PM
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Default Valve stem worn down
So I was working on upgrading to dual springs for a cam sway and found one valve woth thr stem worn down pretty good. Obviously this is very concerning and I know what would happen if it be ded up breaking because of the increased spring pressure so questions is what caused it to wear like this...bad valve stem, bad lifter, etc.? The first photo is with springs install on each side of the damaged one to compare. TIA

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Old Apr 29, 2021 | 01:31 PM
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What kind of rocker arms are you using....and also what kind of valve spring was used on that valve that's worn down?
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Old Apr 29, 2021 | 02:26 PM
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Stock everything but it also has 230,000 miles
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Old Apr 29, 2021 | 02:35 PM
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Originally Posted by JA02ws6
So I was working on upgrading to dual springs for a cam sway and found one valve woth thr stem worn down pretty good. Obviously this is very concerning and I know what would happen if it be ded up breaking because of the increased spring pressure so questions is what caused it to wear like this...bad valve stem, bad lifter, etc.? The first photo is with springs install on each side of the damaged one to compare. TIA


Just a guess, but I'm guessing a mistake was made in heat treating, either the rocker arm, the valve stem, or BOTH. I've never seen a bad rocker, so I'm leaning towards a bad valve stem. Are these OEM valves? OEM rockers? At least you caught it pretty early. The only way a lifter could be involved would be that it somehow got plugged up, and no oil was flowing up the pushrod to the rocker. Check the pushrod cup, the end where the pushrod fits into the rocker. Sorry you're having this problem. But it should be a somewhat easy fix. Good luck, and please post up what happened when you know what caused this......
Last edited by grinder11; Apr 30, 2021 at 08:36 AM.
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Old Apr 29, 2021 | 04:25 PM
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There is a roller rocker in that photo. And that damage looks like a ditch caused by a roller rocker.
So those parts aren't stock.

You will need to replace that valve.
Last edited by RonSSNova; Apr 29, 2021 at 04:25 PM.
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Old Apr 29, 2021 | 05:34 PM
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Originally Posted by RonSSNova
There is a roller rocker in that photo. And that damage looks like a ditch caused by a roller rocker.
So those parts aren't stock.
Where?

The red piece is a valve spring compressor tool...
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Old Apr 29, 2021 | 07:05 PM
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Originally Posted by RonSSNova
There is a roller rocker in that photo. And that damage looks like a ditch caused by a roller rocker.
So those parts aren't stock.

You will need to replace that valve.
That's what I was thinking. MANY years ago, I mis-matched too strong a valve spring set with roller rockers, and that's what happened to me.....

Originally Posted by rjacobs
Where?

The red piece is a valve spring compressor tool...
You need to look again.....

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Old Apr 29, 2021 | 07:07 PM
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Originally Posted by rjacobs
Where?

The red piece is a valve spring compressor tool...
My bad
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Old Apr 29, 2021 | 09:41 PM
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Originally Posted by leadfoot4


You need to look again.....
No, the red piece is a valve spring compressor tool... NOT a roller rocker. I see ZERO rocker arms of ANY KIND in either of the 2 pics...
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Old Apr 29, 2021 | 09:47 PM
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Yep that's my spring compressor tool sorry guys should've removed that before taking pics and replacing the valve or entire heads is what is thinking too unfortunately
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Old Apr 30, 2021 | 07:48 AM
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Originally Posted by rjacobs
No, the red piece is a valve spring compressor tool... NOT a roller rocker. I see ZERO rocker arms of ANY KIND in either of the 2 pics...
It most certainly looks like one.....
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Old Apr 30, 2021 | 08:24 AM
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At 230k miles and that's the only worn out part I think that's pretty good.
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