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David 12/26/2012

1996 Chevrolet Lumina Base 6 Cyl 3.10L


I used some stop leak for a coolant leak. Now I have brown sludge in my oilpan.

I kept having to add antifreeze. I could not find where it was leaking at, so I used a bottle of stop leak in the radiator. Now I have some kind of brown sludge on the dipstick when I checked the oil and I still have to add antifreeze.

1 Answer


Jimm 12/26/2012

The brown sludge is not a good sign and it indicates the cylinder head gasket has a leak - it means the leak is large enough to allow the engine oil to mix with the coolant - causing the brown sludge. The cylinder head gasket must be replaced.


David 2/5/2013

I have heard from other people that it might be a intake gasket leak.

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