Poly Lock Problem !!
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Joined: Jan 2009
Posts: 69
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From: Downey California
Poly Lock Problem !!
I have been working on the rebuild of engine. We opted for a roller setup and the poly locks will not clear the stamped steel covers. My question is will the stock aluminum finned valve covers clear these rollers? Anyone with suggestions...I am definitely open to them. 
Le Mans Master
Joined: Apr 2005
Posts: 6,355
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From: Seattle Area WA
You may have to use two extra thick cork valve cover gaskets to get your clearance. I think that ARP or another company makes a shorter poly lock that may help. The factory aluminum covers aren't any higher.
Here is an example of the short (.860") ones http://www.summitracing.com/parts/CRN-99795-16/
Here is an example of the short (.860") ones http://www.summitracing.com/parts/CRN-99795-16/
Last edited by Scott Marzahl; Mar 19, 2010 at 05:03 PM.
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From: northern california
C2 of Year Finalist (track prepared) 2019
Scott has given you good advice: 5/16" thick gasket and short poly-loks will work. That's the combination I have on one of my engines that has full roller rockers and stamped steel valve covers. No problems, ever.
Jim
Jim
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From: Clayton NC
I seriously doubt you will be able to get the poly locks to fit under the stamped steel covers even with doubling up on the gaskets. What could possibly resolve this problem would to reduce the overall height of the poly lock to clear the stamped valve cover..
Dave
Dave
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From: Dover AR
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From: Clayton NC
I think he is speaking of the small block 300 hp valve covers.
