1985 GMC S15 radiator fluid mixing with oil in engine

1985 GMC S15
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FRANKRIZZO89
Engine Cooling problem
1985 GMC S15 6 cyl Two Wheel Drive Automatic

engine was overheating, we thought radiator had a leak, put leak product in radiator, truck started, but after going a few blocks it started belching smoke. We then found out radiator fluid was mixing with engine oil. Why? How do I repair this?
Mar 7, 2009 at 11:52 AM
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JACOBANDNICKOLAS
  • ✓ASE Certified Mechanic
  • 110,193 POSTS
  • ASE Certified Mechanic
Chances are you either have a bad head gasket, or the intake is leaking. You can check compression to test the compression for a head gasket.
Jul 1, 2009 at 7:04 PM
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