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Can anyone describe the design of the engine oil cooler on a 1995 northstar? Is it air to oil or water to oil? thanks
 

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2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
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If your car is so equipped there will be 2 lines which leave and return to the oil filter adapter upper body by way of a cooler in the passenger side tank of the radiator. They snap into spring loaded quick-connect fittings which are supposed to be replaced if the lines are removed for any reason (O-rings, probably).

So, your oil cooler is water to oil, and is designed to rapidly heat the oil to proper temperature (200 degrees, + or -) and keep it there. Why maintain the oil at temperature? In order to assure correct flow characteristics and to vaporize any moisture or acids for removal from the crankcase/valve cover airspace by the PCV system. Cold (<180 degrees) oil or an unventilated engine rapidly turns the oil and engine internals into a black, gooey mess. Witness the older engines from the early 60's back which had only a road draft tube stuck in the valve cover. I have overhauled old flathead Fords and early Chevy V8's that were so full of sludge that the moving parts had actually created their own channels through the goop.

Sorry for the soapbox...................:rolleyes:
 
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