347 headgasket Question

Those gaskets typically have a 4.08-4.10 bore so that I would not worry about but you may want to check.

Did you put sealant on the lower head bolts/studs, they enter water passages in the block, the upper holes are blind and only require moly lube or oil. If you didn;t that is you source of leak, use Black Permatex to seal the lower bolts/studs, if you have antifreeze already in the motor you need to try to get the threads clean before you attempt to seal them.

You can pull 1 at a time, and reseal them...just draing the coolant level down below the block level.

mikenstang said:

Well, I drained the block, pulled all the short outside head bolts (one at a time) cleaned the bolts and blew out the holes. I put Loctire PST thread sealer on them and retorqued to 85 Flbs. Plus a "little tug".

FIXED!! No more leaks. Whew.. That saved me bunch of work and $$.
Thanks for the help and advice..Now I am off to the TwEECer board to do some tuning.Thanks

Click to expand...

no problem, good luck!