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Very little, less than pt.
 

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Actually, I came to find out that coolant passes through the engine oil cooler hoses. When I originally started this thread, I thought oil ran through the hoses.
Maybe I miss read your first post. did you mean the trans oil cooler lines that go to the external cooler and the bottom of the radiator or were you referring to the hoses connected to the oil cooler where the oil filter is mounted?
 

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I thought he was talking about the trans cooler too. The ones in the oil filter cooler are antifreeze hoses. Pics would be nice.
 

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Discussion Starter · #7 ·
I was referring to the hoses that connect to the oil cooler. The oil cooler is what the oil filter threads onto. I originally thought oil flows through those hoses then I came to find out coolant actually goes through those hoses.

On a separate note, I just got done replacing the transmission cooler hoses. Six of them. In the vicinity of the radiator. Lost about 1/3 pint of transmission fluid in the process.
 

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Sorry man. I must not have read it correctly or something. As you found out the cooler right behind the filter has coolant running through it. How much coolant did you loose?

Did you bypass the radiator warmer? and did you add an aux cooler?
 

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What do you need to know about the Engine oil cooler and/or the transmission fluid routing and cooling system?


Here is a diagram of the Engine oil cooler system. From thermostat housing down to oil cooler then to driver side on engine block.



Link to all components needed. https://www.factorynissanparts.net/images/parts/motor/fullsize/3625062.jpg

Titan (VK56DE) factory engine oil cooler. The U-shaped line on the left leads to the long metal hardline that runs vertically up to the Thermostat housing.




The transmission cooling circuit is a little more detailed, but its nothing you (in general) can't grasp. You have to look at how the lines are routed. Nissan in my opinion could've had their engineers design a more efficient cooler setup; using less metal hardlines/rubber hoses, a different fluid cooler size and location of mounting. Overall, a general redesign in plumbing.
 
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