j_tyler7

So i replaced the tappet cover gasket....therefore removing the ip and resetting timing to 14.5-15* first it was at 16* but i set it back to 14.5-15* thinking that was a problem. I also added 4k gov springs and 60 lb valve springs. Since I have pretty much ruled out timing through checking it and retiming it I am really not sure whats wrong.....new hypothesis is a pushrod is off and not allowing a valve to open so its exploding inside....its pretty loud...anyway heres the vid please help
Thank you for your time
Justin

nascar mark

Pushrod on one of the exhaust was not seated in the lifter and now is bent or broken. You will also have to check now to see if the lifter bowl/ seat lip is broken.

infidel

Valve adjustment.
I would loosen the injector lines one at a time to identity which cylinder is causing the problem.

JD730

Pop off your valve covers and start checking. Should be easy to find.

When you find the cylinder, check both push rods, I've seen the other one bend too.

cj360trider

im goin with the consensus here.....Pushrod/valve problem

j_tyler7

Well thank you for all of your input. The problem proved to be quite nominal. I had gotten all of the valvetrain correctly installed.....HOWEVER...i rechecked valve lash and on the fifth cylinder exhaust I didnt get the locknut on the adjusting screw very tight so that explains how the problem worsened and was fine at start up....through driving it the adjuster backed out and the pushrod came off therefore the exhaust was not opening so I had an explosion that couldn't escape in my engine. the pushrod was off to the side and obvious through visual inspection. I removed it and it was not bent, rechecked valve lash and tightened those locknuts down tight. It runs awesome now!!!! thanks again,
Justin