Mitsubishi shogun 2004 2.5TD
Hi There, How about letting us know your given name, seems friendlier when answering your questions? Okay the problem your friend is having can be caused by something very inexpensive, the radiator cap, or as expensive as a replacement cylinder head. I suggest having the pressure cap tested which means using a cooling system test kit. If the release pressure of the radiator cap has become too low, coolant will be expelled. Also have the radiator tested. If there is a pressure drop look for where the leakage occurs. Other common places of leakage are from core plugs on the engine block and the water pump. Leakage from the pump is many times only evident with the engine running, but be careful only to observe and not to touch anywhere dangerous. If there is a pressure drop but with no evidence of leakage from the parts already mentioned but no leakages are evident, check inside the cabin to be sure that the leakage is not from the cabin climate control. Pressure should be maintained for at least fifteen minutes a little above the pressure stamped onto the radiator pressure cap. If all else fails it is time to suspect the cylinder and cylinder head gasket. If the cylinder head gasket is blown it can sometimes result in a mixture of oil and coolant, evident from the changed colour of the engine oil, but can also leak into the cooling system and result in the symptoms you report. If the engine is petrol with an alloy head, skimming and a replacement of the gasket will usually sort out the problem. If it has a diesel engine with a cast head, the head may be cracked, requiring the cylinder head replacement. Regards John .