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Water reservoir coolant is creamy looking... no water in oil... maybe oil in coolant system

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There is oil in your coolant reservoir, you may have a big problem, either there is a crack between one of your oil passages in the head or the block and the coolant passage, your head gasket is compromised, or the problem could lie inside the radiator if the vehicle is equipped with an oil cooler.

Posted on Mar 28, 2011

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  • hgzinc
    hgzinc Dec 24, 2012

    so if i have and oil cooler what does that mean ...,

  • hgzinc
    hgzinc Dec 24, 2012

    because i have the same problem, oil mixing in my coolant resevoir and not in engine.

  • hgzinc
    hgzinc Dec 24, 2012

    1992 saab 9000 cd turbo automatic w/ oil cooler.... please help .. what do i need to do



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Never use water these days but special coolant. Water makes vapour spots and cause block cracks, worse then blown gaskets!!!
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Look like you have cracks already.
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1 Answer

Engine overheating

From your brief description it appears you have an air lock or maybe head gasket issues.
I presume/hope that recently you have had something to do with the coolant (Rad change or Thermostat) or maybe let water out to add anti freeze? what is needed is a system bleed.
O.k. when engine cool remove header tank cap (Where you add coolant) have the car on level ground start it up and leave it to idle, have plenty of very warm water available. Hopefully after the engine has reached operating temperature a bubbling and boil over will briefly occur. (Make sure you are well away from Coolant filler) top up the system with the very warm water, wait a good few minutes or more as it will possibly gurgle over again. If after a good while it stops then replace cap and hopefully problem sorted.
If the fault persists you may need to repeat process, If when you are doing this operation the water boils over profusely and a lot of air bubbles are seen all the time when warm the Head gasket may have fractured between cylinders pushing gases into the cooling system causing the air lock and overheating.
Final checks! Is the oil on the dipstick Creamy/Coffee coloured? Has the oil filler got gungy creamy gloppy stuff all over it? Is there oil in the coolant? From the exhaust pipe is there a considerable amount of Water dripping when engine running? and finally do the hoses go very hard become pressurised?
The above point toward Cylinder Head or Gasket failure.
Last thing, could the water pump be faulty? is there any coolant driping from behind it?
Sorry for the Epic!
Hope this helps?
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