| Author |
Message |
david anderson (Davidanderson)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 03, 2005 - 10:22 pm: | |
I've never really given it much thought, but upon examining my oil cooler in my 6v92, I wondered how the the thing works. The OEM cooler is plumbed in series with the tranny cooler. Water comes in through the bottom of the water pump from the radiator. The water pump appears to Y off on top, one direction to the tranny cooler, one direction to the engine block.
After that coolant makes its way though the tranny cooler then through the oil cooler which hangs on the lower street side of the engine just behind (when looking through the engine door) the water pump. From there it goes back into the suction side of the water pump through a Y (one side from radiator, one side from oil cooler). All piping appears to be 2".
This setup appears to me to make a continuous loop which bypasses the radiator. The only time it will get radiator cooled water is when the t-stats open at the top of the engine and "some" of the coolant in the oil cooler's loop travels from the oil cooler through the water pump to the engine block through the Y and make its way to the radiator.
Am I making correct assumptions? Please bear with me, as I confess much ingorance in diesel engine engineering and design. My assumption is that Detroit Diesel wants the oil hotter than 180 degrees (water temperature), so it needs less cooling than the engine itself, thus the reason for the loop.
The reason I even explored this is that my engine oil always runs 220 to 240 degrees and the tranny always runs about 180. The tranny heat exchanger is about 20" long and about 8" in diameter. It gets the water first.
220 to 240 on the engine oil has always seemed hot to me. I'm using CF-2 straight 40wt. The oil temp sending unit is screwed into the side of the oil pan.
Could someone explain the reason for the design?
Thanks,
David Anderson |
jimmci9 #2
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, August 03, 2005 - 11:04 pm: | |
coolant is directed thru the engine oil cooler and transmission oil cooler before it enters the engine block...... if you look right behind the water pump, you'll see where it enters the engine block....when the thermostas are closed, the water pump circulates coolant thru the coolers and engine block.... |
david anderson (Davidanderson)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, August 04, 2005 - 2:59 pm: | |
That's kind of what I figured. It has the appearance of looping through the tranny cooler, oil cooler, and engine block when the t-stats are closed. When things heat up the t-stats open and it would be a path of less resistance out of the block to the radiator.
Thanks,
David |
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