omega 2.6 v6 CD oil in water expansion tank and over heating?
over heating after about 3 miles emulsified oil in water expansion tank. Chemical test shows cylinder head to be ok. Water boils over after about 3 miles, system has been flushed and new oil cooler installed and has made no difference ?
i had same problem it was the oil cooler vauxhall wanted over £950 did it my self for just over £100
alan
May 2010
Oil cooler failure is common on the v6 omega. It was probably driven for some time before it was replaced, filling the entire cooling system with that emuusified oily goo. Although now the failed cooler is fixed, the gunge left over is now blocking other parts of the cooling system, notably the radiator, causing the over heating.
Headgasket failure is posible but not so likely on that v6.
VX man
October 2009
Oil in the expansion tank is a sure sign of head gasket failure so I wonder if the test was carried out correctly....the only other reasons for overheating like this is a faulty thermostat or water pump.
John
July 2009
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