EstateWagon79 Posted July 30, 2001 Share Posted July 30, 2001 Please help. I need to know the size of the bolts used for 65 300 valve covers. Any info will be appreciated. <P>Thanks. Link to comment Share on other sites More sharing options...
Guest Posted July 31, 2001 Share Posted July 31, 2001 They are 1/4 20 NC x 5/8" They are the same as Chevy. Some of the Chevy and aftermarket hold downs need to be ground because the radius of the rounded indent is smaller on the Buick. Never over tighten... bent covers are hard to stop leaking. JIM Link to comment Share on other sites More sharing options...
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