Question about 1995 GMC Jimmy

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Oil in the rad - 1995 GMC Jimmy

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If it's brown, you have a blown head gasket and most likely there is coolant in the engine oil pan as well. If the oil is red, it's transmission fluid leaking internally from the cooler...Radiator needs to be replaced and trans oil needs to be changed. You should not drive or run the engine with either condition.

Posted on Oct 02, 2009

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  • Richard Scordino Oct 02, 2009

    Hope it turns out to be the cooler...cheaper to fix!!
    Good luck!



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My Jeep grand Cherokee 2.7 2003 mixes oil with water in the reservoir.

engine oil brown, or ATF oil, pink/red/maroon?
did you look in the rad neck , and then drain out some (by any means)
rad coolant to a jar
let it settle and LOOK, see that oil pool up.
and say, (engine oil or ATF to self?)
first check transmission oil (at dip, or drain it)

if it has has any signs of milkshake color, (cream) BINGO.
the 14psi coolant is pushing in to the transmission too.

try to understand. this:
trans cooler in rad, bottom can be breached.
when you start and engine the trans pump pushes AFT to the rad.
then when engine gets hot, the 12-14psi RAD pressure reverses this flow , coolant to trans.
why not pressure test the trans cooler next, or first.

Jun 15, 2016 | 2004 Jeep Grand Cherokee

1 Answer

I replace the oil pump and the oil sensor, and the oil light keeps beeping and the car is over heating, and the fan is not running

Check to see if your thermostat needs replacing. Sounds like a rad over heating problem.... oil pump problem would seize your rad cap on a cold engine, start her up and look down into rad, takes a few min but if it doesn't circulate after 4 min then your water pump or thermostat needs replacing

Jun 11, 2014 | Cars & Trucks

1 Answer

Oil in coolant Dodge truck 5.7

Color of oil? Dark, is engine oil, looks more red, transmission oil. If engine oil, head gasket/intake gasket may be defective and leaking. If more of a red shade, transmission oil mixing in rad, as transmission is cooled through radiator. Faulty rad will cause them to mix.

Jan 15, 2014 | 2001 Dodge Ram 3500 Truck

1 Answer

The oil cooler has broke mixing the gearbox oil and coolant is this a big job

yes its expensive ,so disconnect the oil cooler pipes from the rad then buy some copper pipe about a 1/4 then make a nice few tubes with a plumbers pipe bender and make it fit infront of the rad or the ac rad where applicable then use a compression joint to connect it all up this will work just as well ,seal up the oil connection on the radiator with a couple of blanking plugs and away you go

May 11, 2012 | Cars & Trucks

1 Answer

How many radiator's does a golf 3 gti have?

it has one engine coolant rad,one a/c condenser(looks like a rad)that sits in front of the rad,they can have an engine oil cooler that sits in front of the rad that looks like a minature rad and if it has an automatic transmission it could have a transmission cooler that looks similar to the oil if your counting thats 4 if it has all of them,hope this helps.

Jun 13, 2011 | 1995 Volkswagen Golf

1 Answer

How do you get the transmission fittings off the radiator. There are no threads at the ends going into the radiator. I am trying to replace the radiator

you cant get the oil cooler off the rad as its all part of the end case,,,if you fit another rad you need the rad from an auto car to replace it with,,,or you may need to unsolder the end cap off the new rad and solder your end cap on with the oil cooler in it,,,
easer to get the right rad to start with???

Aug 14, 2010 | 2002 Volvo S60

2 Answers

Have oil in the anti-freeze and anti-freeze in the oil. Oil cooler checks out. took the head off and gasket looks good. Blew air into oil-ports on head, there was pressure.

you have either a cracked head or a cracked block, there is no other way to explain this assuming the head gasket is good and the oil cooler doesn't leak.

Oct 22, 2009 | 2001 Dodge Ram 2500 Truck

1 Answer

Oil in the rad water but no water in the oil

I would say that there must be a small track between an oil channel and a water channel in a cylinder head gasket. The oil pressure is normally more than the water pressure, so the fluid transfer is one way - to the water system. The track will be very small, so flow will only occurs when oil pressure is above zero. It's all it can be, I think.

Sep 26, 2009 | 1983 Chevrolet Malibu

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