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My Jeep Mixes Oil into the Radiator but not into sump

Some people say it's mixing in the oil cooler but the oilcooler is loose infront of the radiator. It doent overheat, keeps on filling radiator with oil.

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You probably have a blown head gasket or cracked engine block .

Posted on Jan 14, 2013


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Posted on Jan 02, 2017

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SOURCE: coolant mixes with oil when

Well, I have bad news. The problem you are having is teh same problem I had with a 94. That front cover over the timing chain has a hole worn in it from teh timing chain. that means one of teh timing chain guides has broken or come free. There are two bolts that hold the right had guide in place as you look at the engine. If the top bolt is missing then water goes directly from the water channel to the engine oil pan. When you fix this remember to flush the motor several times to get the water out of the block. The good news is you can usually have this front cover welded at a machine shop if there is an actual hole. Total cost of teh repair when I did it, $85 new chain and welding and tube of form-a-gasket.

Posted on Jul 07, 2011

  • 6468 Answers

SOURCE: radiator mix engine oil, what the problem came up???? is't oil cooler spoiler??

some cars crack heads like saturn s series the satun v-6 blows out oil coolers as well as saab v-6 some cars have the intake gaskets leak if it has a oil cooler in the raid it could fail as well don't know what your working on if the oil looks pink check the trans fluid the trans coolers fail as well

Posted on Apr 16, 2012

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2 Answers

My 1Rz engine has oil in the radiator mixes with water but not water mixed with oil in the sump and its not overheating its running fine

toyota engine ...typicaly hilux Efi

inlet manifold gasket blown
corroded water jackets on the inlet side

if found to be sound
wont be long before the oil will mix with the sump
try re torque the head bolts as a stop gap
head warped or blown across water jackets of the block
and not the oil jackets yet


Apr 06, 2017 | Cars & Trucks

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Why engine oil and water mixed in mazda3

Um, most likely not good. Most likely means the block is cracked allowing the water and oil to mix. Major engine repair.


May 16, 2016 | Cars & Trucks

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Oil mixing with water

Then where are you seeing the oil mixing with the water? If it is in the radiator, and you have an automatic transmission, check to see if the transmission oil cooler is internal to the radiator. This can crack and leak into the coolant. Unfortunately, if that happens, coolant will also get into the transmission and damage it.

Dec 30, 2015 | Cars & Trucks

1 Answer

What to do if my water is mixing with the oil

What oil is it mixing with. If it is engine oil then have a compression test done to determine head gasket/cracked head. Water ( grey/white colour oil)can also get to the sump from corrosion holes in the timing cover case behind the water pump impellor. If it is oil in the radiator and is pink ,then it will be from a failed oil cooler in the radiator for the transmission allowing transmission oil to get to the coolant.

Jul 01, 2014 | Cars & Trucks

1 Answer

2000 porsche 911 has oil in coolant

Check your Oil cooler ,which is the aloy mount of the oil filter with two water pipes on. Be Careful first to see whether is the engine oil mixes with coolant and not the Automatic Transmission Fluid if your car is Automatic. If is red colored oil surely is the Automatic Gear box Fluid which is other subject to follow. You have to remove the radiator to renew it or if they have the auto fluid cooler radiator. Good luck.

Aug 19, 2012 | 2000 Porsche 911 Carrera

1 Answer

What's the likely cause for an oilcooler to mix

The passages that the oil runs through inside the oil cooler have likely become corroded and are allowing oil out/coolant in. This has been an ongoing issue with vehicles using extended life antifreeze, particularly Dexcool. The antifreeze becomes corrosive and rapidly wears components that it passes through, i.e. radiator, heater core, oil cooler, etc.

Apr 16, 2012 | 2007 Opel Corsa 1.8

1 Answer

Radiator mix engine oil, what the problem came up???? is't oil cooler spoiler??

some cars crack heads like saturn s series the satun v-6 blows out oil coolers as well as saab v-6 some cars have the intake gaskets leak if it has a oil cooler in the raid it could fail as well don't know what your working on if the oil looks pink check the trans fluid the trans coolers fail as well

Apr 15, 2012 | Beijing BJ Cars & Trucks

1 Answer

I just changed the alternator, the water pump, the thermostat and the serpentine belt in my 1990 Jeep cherokee, 4.0L in-line 6 cyl. However, my truck is still overheating, WHY?

After all said and done,its a bit pertubbing that your car is still overheating.
However,there is still a particular component which if you don't replace,all the other components you replaced won't be of great importance.
I'll suggest you replace the rubber gasket which lies in between the engine compartment and the radiator, When this component is weak,the water mixes with the oil in the engine compartment,hence the oil looses its viscousity easily thereby it looses its ability to absorb heat which makes the engine to overheat automatically.

Thank you for using fixya.

Jul 10, 2011 | 1990 Jeep Cherokee Limited

12 Answers


Everyone automatically assumes that oil and water mixing means a blown head gasket or cracked engine block. Of course common sense is usually not that common. Oil in coolant is a different problem than coolant in oil. The former is a low pressure leak, and could indicate only an intake manifold gasket. It could also be an early or small head gasket leak. Coolant in oil is usually a cracked block or torn head gasket, and has concomitant symptoms of white exhaust smoke and milky oil on dipstick. If you replace the head gasket and the problem persists, an intake gasket could have fixed the problem.

Jun 27, 2008 | 1999 Saturn SL

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