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Old 06-04-2010, 12:14 AM   #1
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Have some oil showing up in the rad. Where do I start to find the problem?

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Old 06-04-2010, 12:15 AM   #2
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What car, year, engine?
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Old 06-04-2010, 12:17 AM   #3
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1989 chevy van. 350
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Old 06-04-2010, 12:22 AM   #4
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Could be a blown head gasket. Do you have any coolant in the oil?
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Old 06-04-2010, 12:26 AM   #5
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No. Been down that road before though. Not with this vehicle.
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Old 06-04-2010, 12:47 AM   #6
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Are you sure it'* oil and not tranny fluid?
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Old 06-04-2010, 12:50 AM   #7
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It'* a brown in colour. Looks like rust acutually. Just had a flush but there is still some there.
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Old 06-04-2010, 12:54 AM   #8
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Tranny fluid in the coolant looks like rusty scum. You may have a cracked radiator. Both the water and tranny fluid run through it in different passge ways. Pull your tranny dipstick and see if the fluid is "normal"
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Old 06-04-2010, 12:58 AM   #9
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I'll do that tomorrow. The rad is fairly new, about 2 years old.

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Old 06-04-2010, 07:55 AM   #10
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If you don't have coolant in the oil then it'* unlikely you have oil in the coolant. Trans fluid is a bit more likely. Check the trans fluid and flush the radiator to see if it comes back. Could be rust. Was it filled with premixed?
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