Question about Volkswagen Passat

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Oil in water resovour vw 2002 passat

Vw passat oil in coolant resovour is oil cooler gone bad

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  • 7 more comments 
  • Anonymous May 17, 2009

    Oil level going down and collant contaminated with oil.
    Coolant reservoir overflowing.

  • PAUL Sep 17, 2013

    no oil in water

  • Camilo Serguera Sep 24, 2013


  • Camilo Serguera Sep 24, 2013


  • Anonymous Mar 15, 2014

    98 vw passat 1.8 does not idle,turns over but wont stay onand a lot of oil everywhere

  • Anonymous Mar 15, 2014

    98 vw passat 1.8 does not idle,turns over but wont stay onand a lot of oil everywhere

  • Anonymous Mar 19, 2014

    VW Passat 93 runs but it over heats and shuts water out of the container were you pour the antifreeze!

  • Anonymous Mar 19, 2014

    VW Passat were is the water pump?

  • Anonymous Mar 28, 2014

    Engine oil cooler keeps going bad 2002 e350


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This is probably a head gasket problem and not an oil cooler problem.

The oil cooler is fairly easy to test.

Remove the cooler from the engine but do not disconnect cooling lines and then pressurize the cooling system. You can use a radiator test tool to put pressure on the cooling system and look for leaks. If it leaks, replace it.

You may also be able to bypass the oil cooler altogether if it leaks.

The head gasket is another story.

Get a 1/4" pipe to spark plug fitting and put a male air coupling fitting in it.

Then you can charge the cylinders with air from your compressor.

Make sure each cylinder that you test is at top dead center so that the valves are closed.

If air bubbles into your coolant, you found your problem.

If air leaks out your intake you have a bad intake valve

If air leaks out your exhaust you have a bad exhaust valve etc.

If you find this useful, please take the time to rate it.


Posted on Apr 15, 2009

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This is not a head gasket problem, it's the oil cooler.  
Water in oil= head gasket - will also overheat, bubbles in expansion tank and loss of water.
Oil in water = Oil cooler. You will also have with non of the above symptoms.
Don't wast hundreds of pounds having your head gasket canged, there is nothing wrong with it!

Posted on Dec 13, 2009

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Might be transmission fluid in the antifreeze not engine oil in water. Could be a fault in the tranny cooler - only a one-way flow, so there is likely no coolant in the transmission. Might have to change the radiator.

Posted on Nov 14, 2014

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1 Answer

2005 Vw passat oil in coolant resovour

This might be a cyl head gasket or oil cooler gasket on oil filter housing

Feb 08, 2014 | 2003 Volkswagen Passat

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VW Caddy - black oil in coolant tank. Runs fine, no smoke, no froth. Is it the oil cooler - is it safe to drive as does not appear to be overheating

This is the transmission cooler,it feeds off of the coolant system.get it fixed right away,because the next problen will be in all of the coolant lines.
Sorry to say but this happened to me before,I ended uup with a fried vr6 and 8,000 bucks of parts and labor for a 58 dollar part that went bad.
please flush the transmission as well as the cooling system.I just about gurantee that this is your problem, believe me I know volkswagens.Gary

Oct 22, 2013 | 2001 Volkswagen Passat

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:

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

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

May 05, 2011 | 1999 Volkswagen Passat

1 Answer

I have oil in the coolant of my 1999 VW Passat 1800 sport, engine code APT. Although on the face of things it looks to be a head gasket failure, I have been told that it may well be an oil cooler issue....

The oil cooler is almost definatly the problem

The reason for this is.

Your oil pressure is normaly anywhere between 2 and 5 Bar depending on engine temp and oil type, where your water pressure is never more than 1.2 bar. Thus the oil pushes into the cooling system due to the fact that it is of higher pressure.

In the event of a head gasket leaking it will push water into the oil not the other way round causing the oil to eventually go white.

These cars are known to have problems with their oil coolers from time to time.

Feb 14, 2011 | 1999 Volkswagen Passat

1 Answer

Got a vw passat 1.9 tdi got oil in water but no water in the oil,changed the oil cooler which was recomended.still finding oil in water is it just still in the water system or a deeper problem

you could have oil in the system for years,as it sticks to the waterways/pipes,so shows as a "slick"Just check you levels every week, to make sure nothing is untoward.

Jan 31, 2011 | 2003 Volkswagen Passat

1 Answer

2000 vw jetta 2.0 checked oil no oil showed on dip stick. saw that oil leaked into coolant system. replaced head gasket w/ new head bolts. flushed system, drained oil, new filter. after all done no oil...

Most likely place for oil into coolant is oil cooler, the aluminum box that mounts between the oil filter and a flange that comes off the block.

Jan 10, 2011 | 2002 Volkswagen Passat

3 Answers

Oil in coolant.had head gasket done.but the problems still ther

either you havent flushed the cooling system out properly ,or the oil cooler has packed up ,their is a oil cooler radiator of sorts that the oil filter screws onto ,these often leak ,just remove the water pipes and join them together with a small piece of copper pipe ,then if you see oil coming out of the water pipes fit a new cooler

May 02, 2010 | 2001 Volkswagen Passat

3 Answers

Oil in coolant . oil cooler bad but which one

Oil generally will get into the coolant due to a headgasket leaking, or a cracked head.

You'll need to pressurize both systems (OIl & Cooling) to try & determine where the leak is coming from. .

Antifreeze in the oil can cause the pistons to sieze in the cylinders and if you've got oil in the anti-freeze, you more than likely have anti-freeze in the oil, or soon will.

Good luck.

Feb 18, 2010 | 1999 Saab 9-5

3 Answers

05 vw caddy. oil is leaking into coolant

This sounds like the oil cooler is faulty .you will need to replace this and then wash out collant system

Jun 26, 2009 | 2001 Volkswagen new Passat

3 Answers

Oil in water resovour vw 2002 passat

Could be just the OIL COOLER. VW IS CORRECT.
If the oil cooloer fails internely you will have a mix of coolant and oil. In the engine and in the Radiator,

But not to say the other guys were wrong...

May 27, 2009 | 2003 Volkswagen Passat

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