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Old 10-12-2013   #15
BlackWidow#2
 
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Join Date: Feb 2004
Location: Pittsburgh, PA
Posts: 148
Default Re: I discovered how to easily drain the oil cooler! (on my 91' at least)

Quote:
Originally Posted by A26B View Post
If I recall correctly, the oil cooler is not in the full flow path until the oil temp thermostat in the oil filter adapter opens. Prior to opening, the oil flow to/through the oil cooler is minimal, so that when the oil t-stat does open, the cooler is fully charged.

That is why you will not see any abnormal pressure lag after an oil change with an empty oil cooler, as mentioned by the OP.
Hi Jerry, That is exactly what I was thinking as I read this post. In my opinion, you are 100% right on. George
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