what year did Gm stop making the dreaded plastic hg that dexcool eats up, or did they even stop?
plastic gaskets
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I think the plastic frame was only on the intake manifold gaskets, not head gaskets.
HGs are composite -- part metal, part something else and they also have a bead of silcone around the coolant passages and that's what Dexcool attacks the silicone beads. Once the bead breaks down then the coolant escapes somewhere, air gets in and brown sludge disaster occurs.
Don't think that GM has solved the Dexcool/gasket problems, 'cause they haven't. It just takes HGs longer to dissolve than the old plastic IMGs. Shops are still replacing HGs on many high mileage GM engines.
Denial will get nothing but grief -- deny at your own risk.
Don't think that GM has solved the Dexcool/gasket problems, 'cause they haven't. It just takes HGs longer to dissolve than the old plastic IMGs. Shops are still replacing HGs on many high mileage GM engines.
Denial will get nothing but grief -- deny at your own risk.
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Thats what i thought, the intake is the worse but also the head gaskets .
So the new cars are still installed with the same gaskets that dexcool eventually kills ?
So the new cars are still installed with the same gaskets that dexcool eventually kills ?
is that right ?
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