HI there,
This is a possibility, but oil in the cooling system is normally a sign of a head problem, these questions are very hard to answer as if the problem was diagnosed as a head issue in the first instance, this may very well have been the actual cause, the only thing that is odd is that the original repairer has done so much work and what he has done can cause the issues you had, under normal conditions, a faulty oil cooler would bot normally cause this over heating, it could if considerable quantities of oil was in the cooling system nd causing a radiator blockage, but the oil would look like a coffee thick shake, the oil & water would emulsify and cause sever overheating problems.
Mark (mhpautos)
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Wednesday, November 25th, 2009 AT 4:51 PM