Praying for a stuck valve that MMO and Seafoam can fix. It only has 70k miles on it, surely the rings and the valves are all still good. Thanks.

 

I believe my valve got stuck open and the piston smacked it causing it to bend. You may be lucky with a stuck valve but I'm not sure about your case. Just wanted to compare.

 

Got to reading where the most accurate compression done is engine warm at WOT. I did neither of those. I'm not expecting drastic results, but gonna try again just to see (crossing fingers).

 

Did a warm compression test with WOT, no difference. Got desperate and did my own 'induction cleaning'. I sprayed and emptied two bottles of Deep Creep in the intake at about half throttle...amazingly enough the idle has smoothed out and the throttle response has almost doubled. Hope it lasts! Seafoam does it again. Maybe it unstuck my valve

 

Finally did a cylinder leak down test for #5 today. Put it at TDC (distributor pin pointing at #5 and with it puffing out air) and put compressed air in it. Air came out of the intake pretty loud. I moved it and 1/8th of a turn all the way through #5's compression stroke, and the leakage got quieter, but never went away and still hissed pretty good Intake valve = stuck or bent.

So, what can I check without taking the head off? I've got the valve cover off, and the valve spring doesn't look broken. Is there anything else I can check?

Thanks.

 

Finally took her in to a guy I trust. #5 cylinder dead. What I thought was lifters was bottom end noise Left side head valves were bad noisy. It was gonna cost more than a new engine to fix everything, so I'm getting a shiny new Jasper. At least I'll know how this ones been treated. Thanks for all the help.

 

i want a new engine, its on the list for next year lol