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I i was cheking my car and i noticed that there was oil in my coolant reservior .. I flushed the system but it keeps coming back

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You probably have a leaky gasket somewhere in the engine although I'm not sure which one it would be the oil is getting in the antifreeze when the antifreeze is pumped through the engine though so follow the radiator hoses to the engine and try to follow its path through the engine I would recommend replacing all the gaskets in that area.

Posted on May 03, 2013

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Posted on Jan 02, 2017

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66 chrgr
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SOURCE: seem to be losing oil in coolant of 2003 impala 3.4

hello your intake gasket is most likely leaking internally into your engine.pretty common problem.the plastic and silicon gaskets get weak over time.

Posted on Jan 26, 2009

66 chrgr
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SOURCE: OIL IN ANTIFREEZE

if this is dexcool antifreeze and it has never been flushed after time it will gum up and turn brown if this is the case have your coolant system power flushed I HAVE BEEN DOING THIS WORK FOR MANY YEARS AND HAVE YET TO SEE A 3.8 MOTOR HAVE A CRACKED BLOCK!

Posted on Mar 06, 2009

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SOURCE: OIL IN ANTIFREEZE

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.

Posted on Jun 24, 2009

  • 55 Answers

SOURCE: ENGINE OIL IN COOLANT SYSTEM

Either your oil cooler is faulty or blown gasget. Oil cooler located on left side of cylinder block size of little bigger than cigaret packet made from aluminium

Posted on Oct 07, 2009

  • 564 Answers

SOURCE: Flush radiator and cooling system on 1997 Calillac DeVille Concou

your radiator has a pecock on the bottom of it screw it out then you can run water through a hose behind it once it stops draining to get any residue out as far as the engine youll never truly get all of the old coolant out without tearing it down and putting it back together so flushing the radiator is just fine.

Posted on Jun 18, 2010

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actually it is not good idea to replace your coolant by water only you shoul full your coolant system 50/50 mixture coolant and water because coolant has uniqe smell and color so easier to identified leaks.
first check your oil condition and coolant reservior for any coolont oil mixture for figure out head gaskets condition if you have any oil coolant mixture in oil or coolant you have a blown head gaskets this will send you to mechanic if everthing looks clear then go front driver side bottom of radiator and open the drain **** (make sure car is cool and put container under because coolant is toxic and mess up your drive way )open reservior tab too and drain all the water close back drain **** probably your vehicle prefer dexcool(red color)
fill 3 qt dexcool then water or just buy ready mix run the engine with reservior tab open and check coolont level add more if necesery suquize collont hoses for air inside when engine start hit up close reservior tab. on passanger side front of the engine has a coolant drain plug open with number 8 wrench untill you see the coolant come out( bleed the system for air) make this several times turn on your heat too and bleed again and watch your upper and lover hoses for any visible leaks fallow small coolant lines like under throttle body check thermostat housing under throttle body on 3.4l engines check under radiator if your pressure cab dosen't look good get a new pressure cab .shut of the car and check for leaks once you find out where is leak from easy to fix it.

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I would really recamend getting a lawyer, and finding out what rights you have in your state. If you can prove all the stuff you claim, this is gross negligence. A mechanic is suposed to be able to put everything back the way they found it. I am thinking they didn't even change your heater core, and just charged you for one. Did you request to see the old one the box the new one came in and the reciept they paid for the heater core. I would have the thermostat checked also.

It sounds like you need a complete power flush witch you can do your self at home but you need to check with a lawyer and a real mechanic first on the problems you may have gained from your first "mechanic"

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It is possible that you have motor oil leaking into your cooling system. A common cause of this condition is a bad head gasket. Since both coolant and oil flow through the cylinder head (through their respective passages), a bad head gasket would allow for cross-contamination. Does the car still run well? Have you noticed any coolant in the oil whilst doing oil changes?

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Oil in coolant reservois


Hi!
The details you have supplied point to possible head gasket failure, however if as you say 2 Winters and No problems if it were me I would leave well alone as if you flush the system it might make matters worse and overheating could occur.
Failing that can you temporarily by pass the heater matrix/core if it runs fine and stays cool then a flush possibly will return warmth to the interior.
Keep an eye on coolant as although you reckon No oil in radiator it is coming from somewhere and settling in the heater.
Finally this sounds saft but do you let your local service station check/top up your fluids? If so then possibly someone not too clever has popped oil in your coolant by mistake?
Good Luck!
Paul 'W'

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