Question about 1986 Volkswagen Jetta
Typically the oil in the coolant would be partial or whole head gasket failure. Head gaskets can fail one direction in that they can cause mixing of oil in water and not the reverse depending on where the gasket failure is.
I would recommend using a combustion leak detector such as
quote from product page:
"Quickly pinpoints combustion leaks. Checks combustion leaks caused by bad head gaskets, cracked blocks and cracked or warped heads. Indicating fluid changes from blue to yellow when exposed to combustion gases in the radiator. Connect the hose to any vehicle vacuum line. Place tapered end of tool into radiator opening after draining of some coolant. With the engine running, the vehicle's vacuum draws vapors through the indicating fluid for testing Includes leak detector and testing fluid."
If you get a color change you can confirm your head gasket issue. This needs to be confirmed solidly before removing the head. Once you have the head off the car you can read the gasket and see where the leak was coming from. My guess is this is from a pressurized oil passage to a water jacket.
You can also use glowing dye in the oil and a black light to confirm the leak more. Either way if this is mixing oil in water only one way it will be a head gasket.
Posted on Jun 04, 2009
Under most normal circumstances on any engine water in oil is a real
problem, and can usually be traced to a leaky timing cover gasket, that
is if the coolant is routed through there to the water pump. Some 4
cyls have the pump attached directly to the block so if that is your
case ignore the timing cover idea, but I've had a leaky one once that
Another one, obviously is the head gasket,
Hmmm... really there aren't too many places where coolant could get into your oil, unless you had a crack in the block somewhere that it doesn't affect your engine performance. because if the gasket is new (considering it was installed correctly) there should be no problem with that, and if your timing cover provides no coolant flow through to the pump, it really can't be too many things other than the head gasket or block.
water (condensed or not) should not be present in the oil at any stage. please get the oil changed and see.... but i seriously doubt the gasket... have it checked.....
Posted on Jun 04, 2009
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Posted on Jan 02, 2017
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