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Radiator has traces of oil

I found traces of oil in radiator, Engine has no leaks its starts and run but get heated up

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The usual source of this problem is a leaking head gasket that allows oil going to the valve area to pass over into the cooling system. If the engine overheated badly before this occurred, you may have a warped cylinder head which would allow this to occur. This is especially problematic in engines with aluminum heads. If any distortion is slight, the head(s) can be resurfaced and reinstalled with new gaskets. A severe warp is grounds for replacement. This is probably not what you wanted to hear!

Posted on Nov 17, 2009

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All you can do is to clean the radiator again and see if is doing the samething cause if it is then there is a leak somewhere

Posted on Nov 17, 2009


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My infiniti q45 is over heating and wont hold coolint

Sounds like the thermostat is stuck closed...( did it overheat quickly?)..Where the top or upper radiator hose connects to the engine is where the thermostat is (usually) located.. it may have its own housing also.. but - coolant flows through this from the you can trace the flow and find it.. make sure you get a new gasket and clean all the mating/gasket surfaces
1997 Infiniti Q45 Service Repair Manual Software

Sep 10, 2017 | 1997 Infiniti.5 Q45

1 Answer

I have noticed a whitish /milkish appearance from the engine oil on the oil dip stick what is the meaning of this milkish


Do a compression test and look for symptoms of head gasket problems. If the leak is internal, then the most common cause is a worn head gasket. Water (or coolant) leaks internally through the head gasket reaching the cylinders where it gets vaporized. Symptoms are coolant fluid level going down (with no external leaks), bad performance, loss of compression, overheating, white smoke from exhaust because of vaporized coolant, traces of fuel in coolant reservoir etc.

If there is no head gasket problem and there is no overheating, then the leak is external. Check pump, radiator and coolant lines.



Oct 22, 2011 | 1993 Toyota Corolla

1 Answer

Heating has stoped working and there is a little water in the oil, think radiator may be leaking, does my car just need a new rad

water in the oil will turn the oil brown like mud,is that what you see? if so,then you have a blown head gasket,do not run motor if this is the case as the motor wiil spin a crank bearing or lock up.are you sure about the water in the oil? look for real brown oil just like mud with bubbles on the oil dipstick. if the heats stopped working it may be because the radiator's low on fluid. look in the radiator for low coolant,if you can't see the coolant when you remove the radiator cap,it's low. with engine cool,remove the radiator cap 1st then start the engine. do you see steam and fluid blowing up frome the radiator? if so,you have a blown head gasket in the motor. head gaskets can blow and leak water into the oil or oil into the radiator. or blow and leak into the exhaust sysytem and blow coolant out of the tail pipe. three different ways for a head gasket to blow. usually the head gasket only blows when the engine has been run really hot!!! hope this helps.thank you for choosing fixya .com

Jan 06, 2011 | 1997 Hyundai Accent

2 Answers

Heaters were not heating up machanic replaced water pump + thermastate and timing belt as radiator wasnt heating up now the water is boiling nut has not oil in it the oil level light is flashing but has no...

I don't understand why the timing belt was replaced for a heater problem. Is the car running rough or missing badly? Have you actually checked the oil or just relying on the oil level light. Check the oil and look for signs of water in the oil. If the oil doesn't show signs of water, refill the radiator with antifreeze and bring the oil level up to the full mark. Run the engine until it gets hot. Turn the engine off and let it cool enough so that you can remove the radiator cap. If the radiator is empty again, there must be leak somewhere. If you can't find a leak then it may be going inside the engine. If that is the case then the engine should be running very rough. Let me know what you find.

Dec 27, 2010 | 1993 Toyota Previa

1 Answer

Has water in oil dont know if a gasket needs to be replaced or the head it do i know.

If you pull the dipstick and the oil looks like chocolate pudding, you have a head gasket failure and possible that the heads are cracked due to over heating. If you start the car in this condition the bearings will seize due lack of lubrication.

If there is only a little trace of oil in the radiator fluid it could be the transmission cooler inside the radiator is leaking trans fluid into the coolant, replacing the radiator will solve this. Just make sure all traces of oil get flushed out.

Oct 18, 2010 | 1992 Dodge Caravan

1 Answer

I would imagine its the head gasketbut what the *** I've never seen anything like the Gulf of Mexico coming out my radiator. i've got 146000 miles on my 91 22-REruns great no had exhaust leaks for...

Hi there

You're probably right about the head gasket.

When one fails it's just the nature of the beast that the blowout is between a cylinder and:
- another cylinder
- the coolant system
- the oiling sytems

BUT, the high pressure needed to cause a blowout is not found exclusively inside a cylinder.

During an over heat, the cooling system can generate enough pressure to blow the gasket by itself.

During the overheat situation you spoke of, the coolant flashed to steam, found the path of least restistance which probably ended up venting into the valves.

This would account for it running pretty much the same
This would account for the gulf in your radiator
This would account for the lack of smoke of any color
This would account for the condensation on the oil filler cap

Pull a valve cover. See if the oil looks like a milkshake.
Run a compression test on all cylinders

Sorry man

Even though the news isn't good, please take a moment to rate my response.


Jun 26, 2010 | 1991 Nissan Pickup

1 Answer

Our Intrigue is blowing anti freeze. We have

The problem will have nothing to do with switching on the heater in the car.

The cooling system pressurizes and if there is a leak in the system the coolant will flow out the points of least resistance. If you are losing a gallon every 2 days the leak is major.

1. All elements of the cooling system need to be checked for leaks including the radiator core, all hoses including the heater hoses, all connections and all cooling system gaskets. I would also run a pressure test.

2. If everything in and on the system checks out then I would suspect coolant is leaking from a blown head gasket and running into the engine's lubricating system and into the cylinders.
If the car has been operated with the engine overheated at any time it is not hard to cause head gasket failure and other damage to the engine. Head gaskets can fail in some vehicles over time in any event. Pull the engine oil dipstick out a number of times and check the oil quality. If you see any traces of a whitish substance in the oil that substance is coolant and it is escaping through the faulty head gasket. Also after running the car, and checking the coolant in the radiator once it has all cooled off, you may also notice traces of oil in the coolant.

Do not drive the car any distance in this condition as you will run the risk of too much coolant escaping and the engine will definitely overheat potentially causing even more damage than might otherwise be found now.

Get the vehicle to a reputable auto repair shop and have the problem checked out.

If a faulty head gasket is the source of the leak, the head on the engine will need to be removed (to access the gasket) and the head and engine block inspected. This work will not be cheap especially if machine work on the head is required or if the head itself was found to be cracked.
Given the low market value of these 2000 build cars, you would have to consider if it was worth repairing in the event you were faced with major repair costs.


Dec 22, 2009 | 2000 Oldsmobile Intrigue

2 Answers

All my antifreeze is gone no heat

DO NOT RUN THE CAR WITH NO WATER,water has to be present in the reservoir to enable the output of heat from the heaters. switch the engine off put water in the reservoir/antifreeze look at the bottom of your engine, see if there is a leak, ifnot fill water on to correct level, close cap, turn engine on, check for leak under the engine, if not when engine reaches optimum temperature, your car should give out heat. after an hour check level of water in reservoir. if it has totally depleted or decreased by a significant amount then, go straight to the mechanic and tell him your observations, it could be your HEAD GASKET, if it is then start saving

Nov 17, 2009 | 1996 Mercury Villager

1 Answer

Car overheating

First, plastic tube may be the overflow vent from the coolant bottle.Check to see where the attached end goes. You are going to have to check engine for coolant leaks (carefully refill system without spilling anything, then look for dripping anywhere. Look for leaks from all hoses, fittings radiator, water pump etc) After checking for leaks, start it up and check again (watch where you put your hands though) While running, check that the fan comes on when the vehicle reaches operating temp.(no fan, check fan motor, sensor & relay) Turn the heat on (does it have heat?) Check temp of lower hose and upper hose. If overheat happens, is lower hose still cold? (likely bad thermostat). If you found a leak, replace whatever is insurance is to change thermostat after any overheat. Last, is there any white smoke from tailpipe, does engine run rough? If so, could be a failed head gasket or crack in cylinder head. (at this point last thing to worry about unless there is excessive smoke or rough run or oil in radiator or coolant in oil).

Feb 24, 2009 | 1998 Oldsmobile Intrigue

1 Answer


It could be your head gasket.

Oct 29, 2008 | 2001 Chevrolet Express

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