Quote:
Originally Posted by NeighborsComplaint
Rocker to retainer clearance gets a lot of things jacked up. One guy on this forum dropped a valve as his retainer was being compressed by a rocker.
The prior owner of my car had a similar issue. He was running the 1.7" installed height springs on RA IV heads and had a paper trail of receipts for changed lifters, springs, retainers. etc. chasing valve train noise. His solution was to grind notches in the underside of the roller rocker rails for clearance! lol
Turned out he was running Dport (short) pushrods causing his problems. I wound up installing Dports with RAIV valves and 1.7" installed height springs and RAIV (long) pushrods and -.050" keepers as a final to get the necessary clearance.
Re: springs, I thought yours was a fresh engine but you say you have run it this way for 10 years?
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Seems like I heard about this with 1.65 rockers, not the 1.5 I'm using.