Question about 2001 Cadillac Catera

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Oil in coolant

Had the oil cooler changed and coolant flushed and still have the same problem.

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  • brivera18 May 12, 2009

    It is engine oil. There is no coolant in the oil. Had the intake gasket replaced with the oil cooler. So I guess it could only be the head gasket. I just want it fixed.

  • Richard Scordino May 11, 2010

    What's in there? engine oil or trans oil? Engine oil can also enter from a bad head or intake gasket. check engine oil for coolant intrusion. Don't drive till fixed or engine will go away.



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  • 232 Answers

This would indicat a bad head gasket.

Posted on May 12, 2009


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My 2006 pacifica has yellow sludge in my coolant resivoir

Probably engine oil, unless you have been adding water pump lube. The oil can come from a blown head gasket, or if you are lucky it can be the transmission oil cooler inside the radiator has failed and is leaking. Either way, DO NOT RUN vehicle until you fix the issue and change all fluids. There is a tester that is used to pressurize the radiator which may help determine what has failed. Many parts stores have a loan-a-tool program that may have this tester.

Mar 09, 2016 | Cars & Trucks

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Oil in coolant

possible internal intake gasket leak. make sure its not trans fluid from the cooler in radiator

Apr 01, 2014 | 2002 Cadillac Deville

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I got a "Check Coolant" error message from my 2005

depends on the cost, oil seal if you can replace it ,it will sort your problem .but you have a158000miles on cooler already .if cooler is not too expensive i would change it completely

Sep 23, 2011 | 2005 Volkswagen Touareg

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1985 vw cabriolet there is oil in the coolant resivior and in there none in the motor is there a valve that is not working or is the head warped

Not uncoomon. If you look where the oil filter is in the front of the motor by the radiator. Where the oil filter screws onto is the oil cooler and has coolant passing around it in a jacket. The oil pressure is greater than that of the cooling system pressure. Replace that cooler and flush the cooling system. This should cure it.



  1. Disconnect the negative battery cable.
  2. Remove the thermostat to drain the cooling system.
  3. Remove the oil filter.
  4. Disconnect the hoses from the cooler.
  5. Remove the nut holding the cooler to the oil filter base and remove the cooler.

To install:
  1. Position the oil cooler, then connect the coolant hoses. Tighten the nut to 18 ft. lbs. (25 Nm).
  2. Install the oil filter and the thermostat.
  3. Fill the cooling system and connect the negative battery cable. Start the engine, allow it to warm up check for coolant leaks.
31liwy-v8nl._sl500_aa300_.jpgthese run about $50

May 06, 2011 | 1985 Volkswagen Cabriolet

1 Answer

Does the trans cooler exist inside the radiator on this V6 engine/auto trans combo? I found a brown foam in my 2001 Saturn V6's coolant overflow tank. It was so thick, i could not read the coolant level. ...

hmmm..........there is a OiL COOLER tube for the transmission cooler in ur radiator, that to keep ur tranny fluid to cool down!

As u said, u checked the engine oil, and it has no decrease on oil level!

Ur right about that... better bring that to ur mechanic and evaluate the radiator, the tube inside might have been damage or corroded!

Hope the seals up ur probs!

Dec 04, 2010 | 2004 Saturn L-Series

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

1 Answer

My car is a volkswagen passat diesel .there is oil in the coolant i was first told the head gasket had blowen. i have also been told it could be the oil cooler. the car is not over heating in fact the...

There is a very easy way to check the oil cooler for leaks.

Do this with the engine cool and be prepared to catch some coolant in a pan.

Remove the 2 coolant hoses from the oil cooler and attach them together using a 5/8 inch straight heater hose connector. You are bypassing the oil cooler temporarily. Wipe the oil cooler clean so you can clearly see any leaks develop.

Now run the engine and watch the oil cooler pipes (the ones you just removed the hoses from) carefully. If you begin to see oil seeping from the cooler pipes you've found your problem.

This might take a while to see so be patient and let the car run for at least 15 mins or more.

Don't worry about the cooler being disconnected while the car is running, but I do recommend reconnecting the cooler if you have to drive it even if you find it to be leaking.

If it is found to be leaking, you will need to replace the part and have your coolant flushed out properly to remove as much of the oil as possible from the system. Also change the engine oil at the same time, it is possible that coolant has gotten into the oil although it may not be obvious.

Good luck.

Jan 31, 2010 | 2001 Volkswagen Passat

1 Answer

So what happens if you get water in your oil cooler? is there a quick way to dry it out?

if you are getting engine coolant into the engine oil cooler then the cooler is porus and should be replaced also change the oil and filter flush and refill the cooling system hope this helps

Dec 16, 2009 | 1996 Volkswagen Jetta

2 Answers

I have oil in radiator ,transmission slips

Does the oil in the radiator look reddish? likely it does...You most likely have a failure inside the radiator where the trans cooler coil runs through it. Replace radiator and have trans fluid changed and flushed. If slipping continues trans will need a rebuild. (hope not)

Apr 01, 2009 | 2000 BMW 3 Series

2 Answers


Hi. the head gaskets on this engine should be replaced asap. they are worn and cracked. this will permit the mixture you have stated in your post.

Jun 24, 2008 | 2005 Dodge Sprinter 3500 Standard Roof

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