Help, Rocker Almost Hitting Retainer Edge!!!
#1
Help, Rocker Almost Hitting Retainer Edge!!!
I'm putting together my 408 from Erik and I just got the heads on and started on the rocker arms only to find out that I had only .025 clearance from the bottom of one rocker arm to the edge of the retainer. The shop that freshened my 5.3L heads ground down the tips of a couple of the stems to make them even and I think that's whats causing the problem. Am I good to go with only .025 on one of the exhaust valves? The other seem to have like .050-.060 clearance.
#4
TECH Addict
iTrader: (3)
http://www.chevyhiperformance.com/te...springs_guide/
according to this article, .040 is acceptable.....maybe you can get a lash cap like they suggest for that one valve to regain that height?
according to this article, .040 is acceptable.....maybe you can get a lash cap like they suggest for that one valve to regain that height?
#6
Thanks, that was a great article. I do think my geometry is screwed up with a big bias to the intake. That would mean I need to shim, if I'm thinking right and that would most likely solve my problem. The motor is still on the stand and the new Caddy lifters aren't pumped up so that I can get an accurate wipe. I think I am going to pull the heads off and replace the valves. Absolute Speed used .080-.100 longer Rev valves. That, and the shop that just did a valve job on these heads, surfaced the valve stems so they would all be the same height, are the cause of my clearance problem. Wish I had the $ for new heads that the short block needs, because what ever I do with these is a compromise.