Re: Post about my GMC "making it"
 

Dude im a seafoam fanatic, its in my oil right now as well as gasoline. Im not sure how i can apply seafoam to this application. Even if i start it with the valves closed it wont get any on the stem. I've been just soaking the piss out of the valves and springs with wd-40, it seems like im just going to have to pull the head off.

Re: Post about my GMC "making it"
 

No amount of varnish is gonna hold a valve open against a spring. You either have terrible carbon build-up, clearance or oiling issues.
Get a dang timing light, who knows what you're running now? Sounds like you might have a cam going south...

Re: Post about my GMC "making it"
 

Do the intake valves get carbon deposits as well? I have been spraying pb blaster on the tops of the holders and the base of the spring, i tap the valve with a hammer and they are moving, One popped loose so far.

Re: Post about my GMC "making it"
 

I cant believe it, after soaking the valves in pb blaster and tapping with a hammer the valves have been free'd.

Re: Post about my GMC "making it"
 

If I were having troubles like this I think I would have gone back through the motor one more time to see what all is damaged. It would probably be quicker.

Re: Post about my GMC "making it"
 

I agree completely, i wish i had enough time and money to go through everything. Im trying it right now turning the motor with a breaker bar and my wifes help, so far so good. As far as things being damaged i confirmed 3 pushrods are bent and 3 valves were stuck closed. Im suspecting the cam is okay since it had plenty of lift to bend the living hell out of the pushrods. Im hoping carbon or caked on oil deposits cause this, in that case it may work, if the valve guides are screwed up its going to bend the valves and ruin the pushrods again im sure, either way worse case scenario i pull the head off, i've planned on this anyways but if this fixed it that works too.

Re: Post about my GMC "making it"
 

UPDATE: After turning it over by hand with my wife watching for loose rockers i decided it should be okay. I just started it and it runs perfectly, better than i have ever herd it run, perfect idle even. Im going to change the oil and seafoam the living hell out of this thing and drive it around a while.

Re: Post about my GMC "making it"
 

well thats good news, hopefully all works out and you don't need to tear things apart.

Re: Post about my GMC "making it"
 

I still can not believe it worked, i changed the oil and put a new valve cover gasket on it and drove it around a while, as soon as im done eating im going to give it one hell of a test drive up a mountain close by. This thing is running like a top.

Re: Post about my GMC "making it"
 

Thats good to hear! :metal: :metal:

Re: Post about my GMC "making it"
 

Thanks man! what a blast, it makes a difference when you have all your pistons firing. Im in love with this truck now.

Re: Post about my GMC "making it"
 

:two: I know the feeling. I hated ny 62 till I fixed the fuel problem and added a 4 barrel then I loved that truck. I hope the truck gives you pleanty of hassle free miles!! :metal::thumbs:

Re: Post about my GMC "making it"
 

that is cool. glad you got it going.