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Old 02-14-2013, 06:12 AM
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couple of STUPID questions...

yeah, I got em:

1- Oil temperature as displayed on the mini max, is it actual oil temperature or is it the coolant temperature in the oil cooler?

2- delta's, my oil temperature when continuously operating, is often two to three degrees higher than coolant, and usually after a stop-n-go.. It generally stays about two degrees warmer.. I've been told not to concern about delta's unless there was significant difference of, like, ten degrees.. this question is kinda tied to the first question, as you may have figured.. 192/194 or 194/196 is the most common condition I see, but have seen 194/197 or even 196/199..

school me if you don't mind! thanks in advance..
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Old 02-14-2013, 06:31 AM
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ive seen 203 under highway conditions. of corse its above 70degrees f here so......

your fine, trust me.......and its the oil temp that it reads
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Old 02-14-2013, 06:34 AM
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thank you, sir...

the concern is the oil temperature, if it is the oil cooler coolant instead of the oil itself in my mind.. if it differs consistently even a couple degrees, by my notions, it may be the start of a clogging cooler- which can be flushed and recovered better than having to swap one of those dang things out!
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Old 02-14-2013, 06:37 AM
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The oil temp sensor is in the flow of the oil back to the engine from the cooler and filter. So it is a measurement of TRUE oil temp to the engine bearings, lifters, etc.

Ford's magic number for oil cooler efficiency is 15*F. So if your coolant temp was 190* and oil temp of 210* then you would know that the oil cooler efficiency is below the desired spec.
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Old 02-14-2013, 06:40 AM
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gotcha... most appreciated!!!

I've also read where the delta can be an indicator of blown head gaskets- and I would assume in such a condition the coolant would be hotter- is that a good assumption? and if so, would that not indicate EGR coolers just as soon as head gaskets?
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