Join Date: Aug 1998
Location: Waldorf Md. USA
2 possibilities I can think of. Not enough clearance between the retainer and seal to begin with or valve springs broken or starting to "go away" allowing the valve to jump open further than it should be. If it's a roller you are pushing your luck with 2 seasons woth of racing anyway.
Advanced Automotive Machine
1971 Chevelle "Heavy Chevy" original owner
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