Mechanics

MERCEDES BENZ S420 COOLANT PROBLEM

1996 Mercedes Benz S420 • 220,000 miles

Please help My car is losing compression but it overheated once some time a funny smell came out of exhaust and coolant continues to disappear.
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Mh1459
October 11, 2011.



It sounds like you have a bad head gasket. Coolant is most likely getting into the combustion chamber causing the smell. Also, coolant creates white smoke when it burns. If you see that, it reinforces the head gasket. Make sure no coolant is mixing with the oil. You don't want to damage bearings and other internal engine components.

He said it is a small leak at 15%. What do you think of using a sealant called blue devil?

Tiny
Mh1459
Oct 11, 2011.
Where is the leak? I never heard of blue devil.
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