Question about 2003 Cadillac CTS

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Oil is mixing in water container causing car to over heat.What could be wrong?

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The oil cooler is located under the intake manifold. The cooler has probably opened up and allowing the higher pressure oil into the cooling system. After replacing the oil cooler you should flush the cooling system.

Posted on Sep 15, 2010

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Posted on Jan 02, 2017

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What can cause a heavily mixing oil and water in the engine but no oil found in the radiator


There is oil already in the engine oil pan and lubrication system and apart from some condensation there should be no water. The only place water can come from in any quantity is from the cooling system and although cracks and leaky water heated inlet manifolds and gaskets can be the cause the most common source of coolant ingress is the cylinder head gasket.

A failing head gasket doesn't very often mean there will be oil in the coolant.

Apr 20, 2015 | Cars & Trucks

1 Answer

I bought a pontiac sunfire 2000, 2.4 twin cam. Bought housing water pump n now the car is throwing black smoke through muffler. Also when I drive mix firing on low speed. It drives great on high speed.


u may hav bad rings or valve guides causing oil to git in the combust chamber burn and foul plugs--watch how much oil is used-may not be that bad cause ok goin fast--try usin a 40 weight oil-called heavy duty on the container---giv that vehicle a detailed inspection before goin hiway--55 and no long trips

Oct 12, 2013 | Cars & Trucks

1 Answer

Mix half water half oil put in reervoir thought dexcool help


If it's in your coolant resevoir just drain it, there should be a hose running to the bottom of the container and has a hose clamp that you can undo to drain it.

Oct 07, 2012 | Cars & Trucks

1 Answer

AUDI A3 2.0FSI 2004 water in oil with no or very little coolant loss


does car heat. if dops water on dip stick it could meen crack in head gasket.milky collour in oil is aways signe water getting in ti sump. watch out for heating. change oil see if colour in oil changes good luck

Apr 05, 2017 | Cars & Trucks

2 Answers

Hi, i have automatic passat 1999 model and recently water happens to get into the gear box and it control board, i experiences a boom sound anytime the gear is changed, the oil has been changed by the...


If no external leak and the transmission fluid colour looks white, the problem belongs to the automatic gearbox oil cooler. The oil cooler has broke mixing the gearbox oil and coolant causing this milkshake. It's a small radiator core type oil / water heat exchanger. It is cracked inside and transmission oil is mixed with engine coolant. Because the transmission oil pressure is greater than engine coolant pressure, the transmission fluid level drops. See also the coolant colour inside recovery coolant reservoir inder bonnet! It could be like this:

tdisline_495.jpg
The automatic gearbox oil cooler type oil / water heat exchanger (oil cooler):

tdisline_496.jpg
In the picture above the transmission oil pan was removed for oil filter replacement.

May 05, 2011 | 1999 Volkswagen Passat

2 Answers

There is a white creamy substance around the oil cap what would cause this


The white creamy solution is oil mixed with water. Take out your dipstick and check for the same substance, if so, you have a blown head gasket. If not, it's just condensed water in your valve cover that mixes with the oil, witch isn't really a problem. Have a nice day!

Dec 14, 2010 | 1999 Volkswagen Beetle

1 Answer

Transmission fluid level need regular top up and there is no external leak.Fluid color looks white.


If no external leak and the transmission fluid colour looks white, the problem belongs to the automatic gearbox oil cooler. The oil cooler has broke mixing the gearbox oil and coolant causing this milkshake. It's a small radiator core type oil / water heat exchanger. It is cracked inside and transmission oil is mixed with engine coolant. Because the transmission oil pressure is greater than engine coolant pressure, the transmission fluid level drops. See also the coolant colour inside recovery coolant reservoir inder bonnet! It could be like this:

9d86426.jpg

The automatic gearbox oil cooler type oil / water heat exchanger (oil cooler):

138b4e6.jpg
(In the picture above the transmission oil pan was removed for oil filter replacement).

Oct 29, 2010 | 2005 Audi A4

6 Answers

Audi a4 mixing water and oil together hissing,grey/brown foam


That is not true oil and water being mixed can come from many different places. Such as a bad radiator which would cause transmission oil to mix with the water also alot of audi's have a water cooled oil cooler which are a very common cause of oil being mixed with with water. These type of oil coolers are located under you oil filter. They have water lines hooked to them which cools the oil and when they go bad the water and oil will mix. So dont be convinced that its your head gaskets it could be but not as likely. You can pressure test your oil cooler to see if this is the problem just romove it an plug one off the inlet or with rubber plug which can be purchased at you local hardware store (I found mine at ace hardware in there specialty drawers where they have all there bolts) then attach a air hose to the other outlet pressureize the system and place it in a bucket of water. this should tell you if the oil cooler is bad but be careful not to ove3r pressureize the cooler this could damage it and caust it to leak. 15 to 30 psi should be plenty.

Mar 30, 2009 | 1999 Audi A4

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