1988 GMC C1500 coolant in the oil

1988 GMC C1500
160,000 MILES • 6 CYL • 2WD • MANUAL
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THEFOOSER
  • MEMBER
  • 1 POST
What can cause coolant to get into the oil?
Oct 4, 2009 at 2:12 AM
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MERLIN2021
  • ✓Experienced Mechanic
  • 17,250 POSTS
Blown head gasket, perform a compression test.
Cracked head do same as above
cracked block internal water jacket.
https://www.2carpros.com/dia/how_to_check_compression.htm
Oct 4, 2009 at 2:44 AM
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