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Coolant coming out of the overflow is a sign of over-pressurisation. The cheapest cause of this is the pressure cap failing - have you replaced that? The other main causes of it are overheating, or gas getting into the system and so increasing the pressure, usually through a head gasket breach between a cylinder and the water jacket. Have you noticed any ...


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You have to be sure what the substance is, in your coolant. How are you determining that it is oil and not transmission fluid? They often get confused by people. A good way to be sure is to check the levels of the transmission fluid and oil, depending on the leakage, usually the low level one is leaking. If you are absolutely sure it is indeed engine oil, ...


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Check if its not residue (brown stuff) coming from your overflow reseviour, otherwise I'd say it could possibly be a rear main seal (have to remove transmission to replace) or head gasket (which I highly doubt unless you've overheated it around the red marker for a long period of time).


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This is the heater valve. It's Motocraft part# YG350:


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It's not unusual for a second radiator to be present behind the main radiator, often to cool the transmission fluid. If these fluids are mixing (water and transmission fluid), then both radiators have been damaged and are leaking their fluids together. Both radiators will need to be removed and repaired. Sometimes coolant will appear in engine oil because ...


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I take it from the wording, English is not your first language. To answer you outright, there is no reason to mix coolant and oil, under no situation where a vehicle is concerned. If you are actually asking why oil would be fed through something containing coolant (radiator or such), the reason would be simple in that it is cooling the oil. By cooling the ...


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I have never been able to find any empirical evidence to support the various claims made by different coolant manufacturers. As far as I know, it does not exist. There are no absolutes. You will not necessarily be safe even using coolant with the brand name of your car on it. I have been an auto mechanic for 35+ years. Back in the old days (actually not that ...


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This is normal behavior for some vehicles. They utilize the fan to further cool the system after engine shut down (even though it does not further circulate the coolant). This is something I would not be worried about.



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