Gary wrote:
>
> I've got an 85 passenger van and I'm getting combustion gas in the coolant.
> Heads were rebuilt about 6000 kms ago.  I'm thinking of pulling the heads
> with the engine in the van, leaving sleeves in place.  My question is: has
> anybody used a sealant such as permatex ultracopper on the green o-ring and
> the thin flat metal ring gasket?  Or is this a stupid idea?
> What kind of sealant did you use?
> I'm guessing that the black ring gasket at the crank end of the sleeve is
> not the source of my leakage problem.
> Head bolts have been used twice, how many times have other people torqued
> their bolts?
> I'm willing to try some kind of repair and R and R before I buy new heads.
> Any suggestions?
>
> Thanks for any ideas
>
> Gary
Gary
the green oring is not the problem its the gasket on top of the
cylinder. If the engine has been overheated then the top gasket will
leak most times it stops when the cylinders warm up and expand restoring
the seal. I cant think of any sealants that would help prevent this. you
may need new heads to cure this leak but give it a shot if you have more
time than money
head nuts can be reused torque them to 37 lbs
Bob
http://www.bostonengine.com