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1999 Other Saturn Models Oil Mixed in the coolant

Tiny
SHAUNABAY
  • MEMBER
  • 1999 SATURN
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 145,000 MILES
Oil is mixed in the coolant, but the dipstick has no milky substance, but the coolant reservoire is full of oil and water, replaced the radiator, thought the oil tank might have burst inside of the radiator inside the oil lines. What is the next step to check, hewlp me out, please? I'm stumped on this on.
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Saturday, May 24th, 2008 AT 12:28 AM

1 Reply

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

The first thing to do is flush the coolant & as much of the oil residue out as possible, use a coolant flush, when you have the system cleaned. Check after a few days driving, if oil is still entering system, you may have a cracked head, allowing high pressure oil to enter the coolant when a small crack my open when engine hot. If the trans cooler has been replaced (has this been checked for a breach?) It would be a good idea to make sure there is no water in the transmission as well. Start here.

Mark (mhpautos)
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Saturday, May 24th, 2008 AT 3:49 AM

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