Thread: Brown Sludge under radiator cap

every one has thier beliefs on Dex-cool. I personally have seen what it has done to my '02 GP. about $400.00 worth of damage, thats if you rebuild the top half of the motor your self! GO-GREEN!!!!!!! Dex-cool eats intake gaskets, Head Gaskets, PLEASE FOR THE LOVE OF GOD DON'T WAIT !!!!!!
seriously thoughGM designed dex-cool to maintenance free for 100,000 miles -and it is.
it also is hard on other stuff inyour engine
good luck flush,flush,flush!!!!!!!!!!!!!!!!!!!!

thank you for the replies! the oil looks fine all of the time so i dont think any coolant is getting in there. this dex-cool stuff is nasty. i like to do everything myself, but i may have to take it somewhere to get a flush or two done. i do have a feeling, like you all said, that it will take a few times to clear out!

Originally Posted by scbird94

Sounds like your intake gasket allowing oil into your coolant. and coolant into your oil. An ethylene glycol test to your engine oil will confirm coolant contamination.

Good news is, its a super easy job and now Fel-Pro FINALLY made theyre famous upgraded intake manifold gaskets (permatorque) for the 3800. been using those gaskets on the 3.1 and 3.4 for years and its a permanent fix that doesent break down like the replacement plastic gaskets do.

GM has actually updated the plastic gaskets as well now