Re: Gaskets?

Posted by TO-35Man on July 06, 2003 at 06:05:22 from (209.86.129.103):

In Reply to: Gaskets? posted by Sean W on July 06, 2003 at 00:09:28:

I agree proper torque is paramount to a good seal but there are more things to check...it may look clean and flat but check it and you will know for sure, use a known straight edge and feeler guage to check flatness on block and head.Antoher common mistake is cleaning those surfaces with a grinder with sanding pad or wire brush attachment these will leave the surface uneven enough to cause a leak if your not careful. 3m makes a rubber pad gasket remover for use on small grinders they work good and dont distort surfaces.Always tap head bolt holes and check bolt thread pitch with a pitch guage or just run a proper size nut on it if you cant run nut on it by hand replace bolt after all its over 20 years old,also check bolt for pitting.Every time you torque bolt it stretches it may have reached it stretch limits ,if while torquing it, it pops or squeaks its time to replace it.I always use copper coat spray on sealer on all head gaskets and any gasket that is not cork and I also lightly spray head bolts or head studs only takes a little dab on each.I build a lot of engines and have not had one leak when I do this.
good luck on your next restortation hope this helps....

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