1996 Mercedes Benz S420 Car Losing Compression Overheated Once Time Funny Smell O

1996 MERCEDES BENZ S420
220,000 MILES
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MH1459
  • MEMBER
  • 4 POSTS
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.
Oct 10, 2011 at 10:26 PM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
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.
Oct 10, 2011 at 11:18 PM
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MH1459
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  • 4 POSTS
he said it is a small leak at 15%. what do you think of using a sealant called blue devil?
Oct 11, 2011 at 10:23 AM
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JACOBANDNICKOLAS
  • ✓Experienced Mechanic
  • 110,240 POSTS
Where is the leak? I never heard of blue devil.
Oct 11, 2011 at 6:14 PM
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