What could be the cause for engine oil to be leaking into my coolant system?
Feb 11, 2010 at 7:07 AM
ERNEST CLARK
✓Experienced Mechanic
1,730 POSTS
A blown head gasket, cracked block/cylinder head can cause oil to get into the coolant. Also, are you sure it's oil and not tranny fluid. Because if your radiator has a built-in trans cooler, sometimes the internal tank cracks and tranny fluid will leak into the coolant.