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 Second Generation Camaro Owners Group Message Board
 High Performance Modifications
 Rocker arm galling
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| Author | Topic: Rocker arm galling |
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Mz28att Veteran Member |
posted February 27, 2005 03:18 PM
     
Hey guys, I was setting my valves again today and noticed that the Trick-flow roller rockers are galled in the area where the screw in studs transition into a flare where the hexagon shape is. Ill have some pics up here later. The only thing I can think of is that the pushrods may be too short. Any suggestions? MaTt
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rustbucket79 Veteran Member |
posted February 27, 2005 03:30 PM
I would concur. You may want to entertain lash caps, longer pushrods, or a combination of the two. ------------------
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Mz28att Veteran Member |
posted February 27, 2005 03:44 PM
Um whats a lash cap? Also, there is no wear pattern on the valve tip to determine this. What increments do pushrods come in? Im pretty sure I have stock length ones. thanx MaTt
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Mwilson Veteran Member |
posted February 27, 2005 03:46 PM
i had to go to .100 longer
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rustbucket79 Veteran Member |
posted February 27, 2005 03:52 PM
Lash caps are a hardend cup that sit on top of the valve tip. Comp, Manley, etc sell them. You can buy quality pushrods in .050" increments. ------------------
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1978LT Veteran Member |
posted February 27, 2005 04:10 PM
I'm surprised everyone doesn't use lash caps. They are cheap insurance against beating up the valve stem.
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Mz28att Veteran Member |
posted February 27, 2005 06:25 PM
Ok, lemme understand this. If I put a lash cap on the valve/spring, that will make my pushrods effectively longer? MaTt
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rustbucket79 Veteran Member |
posted February 27, 2005 06:32 PM
what it will do is raise the rocker arm up (like having a longer valve tip) which will move the rocker away from the rocker hex. ------------------
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Mz28att Veteran Member |
posted February 27, 2005 07:26 PM
I think I have some on some other heads, but it looks like for what I need, pushrods would be easier to change right? MaTt
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Breese Member |
posted February 27, 2005 07:50 PM
We use the Super Locks set-up for lash caps. 10° You can gain or loose .050 assembled spring height real easy for a inexpensive set-up. A solid or maybe a mild roller cam. We need some pics..Good Luck
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rustbucket79 Veteran Member |
posted February 27, 2005 11:34 PM
The pushrods are a better option because the lash caps can be an issue with keeper/retainer interference. Make sure your geometry isn't out to lunch with the longer pushrods, you may be forced to run the caps as well. http://www.compcams.com/Technical/CurrentCatalog/HTML/JPG/352.jpg P/N 621-16 if you need them, the outer lip must NOT contact any part of the keeper or retainer, dropped valves can result!! ------------------
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Mz28att Veteran Member |
posted February 28, 2005 01:01 AM
Hey Rust, how exactly are the lash-caps installed? Does the valve train have to be dismembered? If so, I think I will try one size longer pushrod. When I assembled the engine, I did the test where you mark the valve tip and run the rocker over it to check the witness mark. If I remember correctly, the roller was more inside than out. MaTt
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rustbucket79 Veteran Member |
posted February 28, 2005 01:25 AM
They sit on top of the valve tip, there's a recessed hole that the valve sticks in. A longer pushrod should move the rocker contact further outside. ------------------
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