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Author
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Topic: adjustable valve-train question
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Boss66
Gearhead Posts: 167
From: Tucson, AZ
Registered: Feb 2000
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posted 04-04-2001 11:53 PM
   
My question is about the poly-lock nuts that hold the rockers down and are used to adjust the valves. The little allen screws that screw in the top of the nut and lock in the adjustment only have a few threads before they hit the rocker stud, when the valves are properly adjusted. I'm afraid a few of the ones with the least amount of threads might come loose. What can I do? Put a spacer underneath the nut? Use longer pushrods? Has anyone else run into this situation?Thanks, Boss66
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steve'66
Gearhead Posts: 9555
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 04-05-2001 01:18 AM
Boss,If you use a spacer make sure they are hardened. Comp Cams and Crane sell a "kit" for making early 351w heads "adjustable". It consists of hardened washers and lock nuts. Throw the lock nuts away and use the hardened spacers, unless you know where to get hard washers. Don't use normal washers, maybe grade 8 washers will work?!? SteveW
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Butch Jennings
Gearhead Posts: 634
From: No. California
Registered: Apr 2000
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posted 04-05-2001 08:30 AM
You didn't specify what size the studs are, if they're 7/16" I'd use a head bolt washer, provided your rocker arm geometry is correct. Butch ------------------
Butcher's Home Page
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Tom351
Journeyman Posts: 93
From: Marietta,GA
Registered: Mar 2001
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posted 04-05-2001 09:00 AM
You could get shorter studs.
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Moneymaker
Administrator Posts: 27660
From: Lyons, IL, USA
Registered: May 99
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posted 04-05-2001 11:16 AM
A little dab of Loctite and some judicious tightening will work fine also.  ------------------
Alex Denysenko Co-Administrator and Moderator NHRA/IHRA/SRA member
Fleet of FoMoCo products
Moneymaker Bio
US Class Nationals link
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