Question about 1999 Oldsmobile Silhouette

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Have a 1999 Oldsmobile Silhouette that is overheating? The overflow coolant container is full and there is oil. What else could the problem be?

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  • Oldsmobile Master
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Oil in the coolant caused by blown head gasket or cracked head. This will also cause overheating. :o(

Posted on Sep 04, 2010

  • Noe Solano Jan 08, 2011

    #1 cause.-could be oil trhu transmission cooling system, (radiator broken)
    #2 cause.- oil trhu cooling oil filter, check it at all, before make major job!

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If there is no noticeable coolant leak, there are 2 major causes of overheating #1-thermostat is bad, #2- fan clutch or in your case electric fan could not be working.

Posted on Sep 04, 2010

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When oil mixed with cooling sys. can cause overheating blocking thermostat, check motor and transmission level at dipstick, if doesn't shows mixture(brown or rare color), then the problem isn't at head or engine, good luck

Posted on Jan 09, 2011

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SOURCE: vehicle is overheating...2000 oldsmobile silhouette

It's possible you have a blown head gasket. In that case, the heater core which is above the engine fills with exhaust and stops working. To verify this condition, check exhaust for excessive white smoke. If leak is still small, it's possible you won't see much. In that case have a shop check the radiator for hydrocarbons (exhaust). If the test shows any in cooling system, you definitely have a head gasket problem.
I'd also check the thermostat. Sometimes it can give similar symptom but more often than not this will trace back to the hg.

Posted on Apr 08, 2009

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SOURCE: 1999 Silhouette Oldsmobile. My van is jerking when

How many miles on the transmission, and have you ever changed the trans fluid?

Posted on Feb 16, 2010

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SOURCE: 1999 Oldsmobile silhouette brake light and tcs

check the abs sensors common to hit or damage the wiring or knock connection loose when doing a brake job the traction control system[tcs] is tied into the abs system

Posted on Jul 21, 2010

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1998 Oldsmobile Silhouette overheating


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Aug 04, 2011 | 1999 Oldsmobile Alero

1 Answer

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1 Answer

How do I put coolant in my oldsmobile shilouette?


add coolant to the overflow tank. when needed, the radiator will **** coolant from the overflow into the radiator. coolant is added to the overflow tank due to this being a closed - pressurized system

Aug 07, 2010 | 2000 Oldsmobile Silhouette

1 Answer

2000 oldsmobile Silhouette engine over heating and oil mixing in engine coolant


These two problems are related, your engine is overheating because there isn't enough coolant to dissipate the heat. There are three main causes for coolant in the engine oil:

1. Cracked head
2. Blown head or intake gasket
3. Cracked block.

The gaskets are an easy and relatively cheap fix, the head replacemnet isn't to difficult but will run you more than the gaskets. If the block is cracked (pretty rare) you'll need a new motor because it's going to comletelyu fail sooner or later.

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