Was the cooler a "Cat Classic" part or Gen. Cat?
Gary
It was general Cat
Any sign of oil in the cooling system?
Transmission oil cooler is about the only place transfer could occur.
Normally the oil side of the cooler would be higher pressure than the cooling system
The pressure in the transmission cooler is only lube pressure and could be below cooling system pressure when hot, the oil could also be too viscous to go through a hairline crack in the cooler, but coolant will, after the engine is shut down and there is still pressure in the cooling system.
There is some oil in the radiator. Thanks for the help. Guess I'll get one on order.
All signs of oil/water being transferred across the cooler as either side alternates from hot to cold and cycles through the operating temperatures and pressures.
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