Thread: Dex Coolant

Dex would turn to oat back years ago. Formula's have changed many times since. Ford, Dodge and GM all went to nylon based gaskets and had issues. That particular part wasn't the coolant's fault. It was either neglect to do maintenance (coolant exchange) or it was nylon gaskets. Hence why GM fixed the issue with metal frame gaskets.

Originally Posted by KennethJohnson

Are you saying if I swap to metal gaskets I should not see the sludge again? (After doing a complete flush on the coolant system of course)

sludge is from air making contact with the old dex coolant. flushing it to clear water, then adding a flush to it will clear most of it out, you'll still find a booger here and there on the rad cap after wards down the road. nothing to worry about.