I've searched and searched tonite and I still have a question. I got a combo of a heads, cam, pushrods that were slightly used and installed them. I got the idea to check pushrod length/preload and here's what I found. I get apx 2 turns of preload with caddy lifters which should be good. While doing this I notice both valves start to open slightly. Is this normal? The engine has been apart since about Oct. The cylinder is at TDC also.

 

Make sure the lifters are on the basecircle. If so, you should back off until the valves stay closed. What combination of parts.

 

the heads are ETP 225 w/their rocker stand, stock rockers, 8.2 pushrods and a comp cam of some sorts. I found an old post from 06 where the member had the same setup, same results....but there were no replies. here's the post

https://ls1tech.com/forums/showthrea...hlight=preload

 

i think my etp heads use 8.1 and 8.125. mine are some older 235s...gm mls gaskets. i think i got around 3/4 of a turn on my stock rockers/lifters...doesnt seem overly loud. lq4 block in mine so deck is around 9.220