Question about 1998 Buick Park Avenue

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Oil mixing with coolant.Car is overheating, coolant is tan.Had radiator tested.It's not trans fluid.Oil level fine and no coolant in oil.Oil on top of heads look fine.Buick park ave 150,000 miles 1998 supercharged

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If this is a 3800, Upper Intake Plenum or Lower intake gaskets are an inevitability. Head gaskets on these engines rarely go out! Seriously, don't get duped. I am doing the job on my grand prix right now. Google it for further explanation.

Posted on Oct 19, 2009

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Possible Head Gasket Problem As OIL PRESSURE is ALWAYS Higher that Cooling System Thus Allowing OIL to Get into Coolant

Posted on Jul 30, 2009

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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



toyota_1rz_20_efi_hiace-ldszvhuomwkbtubxskurqnxk-1-1.jpg

Apr 06, 2017 | Cars & Trucks

1 Answer

I had an accident and something put a hole in my radiator, now its leaking red fluid and i dont know if it was trans fluid or antifreeze any advice on the system would help


depending on the make of car, some have a red antifreeze additive
put your finger in it and if it is slipper then it will be transmission oil
however the oil cooler for the transmission is in side one of the tanks ,unless the hole is in a tank then I would think that the fluid is coolant, check radiator level at the cap and if you need water then it will be the radiator coolant
check the transmission oil on the stick and if it is bright red or tan colour then the damage will be in the cooling system as water in oil tends to pink or grey

Jun 13, 2015 | Cars & Trucks

2 Answers

My s 430 has smoke coming from under hood after driving but not all the time temp gauage reads normal. I had oil and trans leaks sealed but it is still happening, what else could it be? Thanks


SMOKE UNDER HOOD COULD BE COOLANT LEAK FROM RADIATOR ITSELF OR CHECK FOR LEAKING TOP RADIATOR HOSE AND CHECK FOR LEAKING BOTTOM RADIATOR HOSE.LOOK UNDER THE HOOD IF COOLANT BOILING OUT COOLANT OVERFLOW JUG ENGINE OVERHEATING FROM BAD THERMOSTAT OR BAD WATER PUMP.CHECK FOR COOLANT LEAK AT WATER PUMP WEEP HOLE.IF SO WATER PUMP NEED REPLACING.ADD MORE COOLANT UNTIL LEVEL CORRECT.TRY LOCATE LEAK. IF CAR OVERHEATED AND BOILED IT OUT. SMOKE UNDER THE HOOD CAN ALSO BE CAUSED BY LEAKING VALVE COVERS WHICH CAN BE FIRE HAZARD IF OIL LEAKS ON HOT EXHAUST MANIFOLD.

Mar 21, 2011 | 2002 Mercedes-Benz S-Class

3 Answers

The coolant jug has a creamy tan color fluid in it


that means trans fluid or engine oil is getting into cooant system. Not good. Either a leaky trans cooler in the radiator or a blown head gasket. Hope it's the trans cooler

Dec 08, 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

2 Answers

I have a 2000 pontiac grand prix gtp with supercharger. I have oil in coolant reservoir, I am not getting the white steam from exhaust pipes. car runs fine. not overheating. I checked the oil dipstick and...


The reason for this is because your trans cooler(which is built into the radiator itself) has failed and burst causing trans fluid to contaminate the cooling system.The fix for this is to remove and replace the radiator with a new one and then flush your cooling system to remove all trans fluid.I hope I could help!!! Any other questions please get back to me and rate me accordingly.

Apr 10, 2010 | 2000 Pontiac Grand Prix

3 Answers

My trans fluid is mixing with my radiator fluid, what can i do.


I hate to contradict the prior poster, but I would not see how a blown head gasket could get transmission fluid into the radiator. Motor oil, yes, but transmission fluid, no.

the transmission fluid in your tranny runs out of the transmission and up into the radiator to cool it off.

So if there is transmission fluid in the radiator, I'd look for a leak in the radiator. If it is mixing the two fluids then the leak is probalby internal.

Remember that if the radiator is now 'mixing' water and transmission fluid, there is a possibility that the fluid/water mixture may be going back into the transmission as well

May 16, 2009 | 1994 Buick Park Avenue

3 Answers

Overheating, water in oil


You have a bad head gasket. You will not know how bad the damage is until the engine is disassembled. Chances are, a head has warped though, and will need to be machined.

I hope this helps you, and I wish you luck on your repair.

May 12, 2009 | 1997 Chevrolet Blazer

3 Answers

Some kind of oil in coolant


Start by flushing the radiator first. Also if the oil is darkish in color it's a big possibilty it is tranny oil. If the car was worked on because of blown gasket then oil residue is also a probability.

Apr 28, 2009 | Toyota Celica Cars & Trucks

3 Answers

98 Acura CL oil in coolant/radiator


its a blown head gasket 100% sure of it!!

Apr 15, 2009 | 1998 Acura CL

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