Twin_Turbo
Der Maulwurf
- Joined
- Mar 5, 2008
- Messages
- 7,575
engine suddenly makes horrible noises... uh oh!!!
clearly from pass side valve cover, pull cover... UH OH!!! I see a rocker riding a spring and no retainer... wtf??? didn't take a pic. Pulled off rocker.. oh no!!!



hey, I can still see the valve stem, pulled it up..hmm, goes up to almost where it has to go, maybe not terminal damage after all. Plug looks good too, not chewed up from debris bounding around. Oil was good, coolant too...good oil pressure.
tinker tinker tinker...pull head




Damned gm lt4 hotcam junk, I knew it was set up for lightweight lt4 valves, installed stiffer valve springs but it looks like the valve still floated (stock lt4 junk only has about .035 to bind w/ 1.6 rockers), all installed heights are spot on, I mic-ed it..I always do. The spring and everything were still where they belonged, just the spring retainer was gone and the locks and debris lying in the head. Still a crappy situation but not as bad as it could have been. Only issue is the marks on the piston and the scratch in the wall. I'll probaly smooth out the piston and will take the scratch for granted. Will not run these retainers again, going to use the normal thicker ones.
clearly from pass side valve cover, pull cover... UH OH!!! I see a rocker riding a spring and no retainer... wtf??? didn't take a pic. Pulled off rocker.. oh no!!!



hey, I can still see the valve stem, pulled it up..hmm, goes up to almost where it has to go, maybe not terminal damage after all. Plug looks good too, not chewed up from debris bounding around. Oil was good, coolant too...good oil pressure.
tinker tinker tinker...pull head




Damned gm lt4 hotcam junk, I knew it was set up for lightweight lt4 valves, installed stiffer valve springs but it looks like the valve still floated (stock lt4 junk only has about .035 to bind w/ 1.6 rockers), all installed heights are spot on, I mic-ed it..I always do. The spring and everything were still where they belonged, just the spring retainer was gone and the locks and debris lying in the head. Still a crappy situation but not as bad as it could have been. Only issue is the marks on the piston and the scratch in the wall. I'll probaly smooth out the piston and will take the scratch for granted. Will not run these retainers again, going to use the normal thicker ones.