Partial flow oil cooler

[Wingphil]

Hi all
On an om642 which has a reputation for high oil temps I am fitting an oil cooler. Rather than aftermarket solutions I thought would use the factory option used on the pickup truck.
A partial flow oil cooler. The size I have chosen is basically the same as the aftermarket full flow option and a bit bigger than the factory partial flow solution.
The question is really related to do I need a thermostat, aftermarket and merc version don’t use them.
And the other is does a partial flow cooler have the same effect as a full flow if it uses the same size cooler. Obviously it only cools half the oil perhaps a bit cooler than full flow, then mixes it back into hotter oil, where a full flow cools the whole lot.
Anyway interested in thoughts.
Thanks.

 

[Kira]

Since diesels are said to be cooler running and/or take a long time to heat up, whatever you decide to do MAY REQUIRE a thermostat be included.

Where you live and how you drive might be factors.

An M-B site might have more members with specified knowledge and experiences. I had to look up om642.

If you can benefit from an oil cooler, maybe adding a transmission cooler is smart?

 

[oil pan 4]

Hi all
On an om642 which has a reputation for high oil temps I am fitting an oil cooler. Rather than aftermarket solutions I thought would use the factory option used on the pickup truck.
A partial flow oil cooler. The size I have chosen is basically the same as the aftermarket full flow option and a bit bigger than the factory partial flow solution.
The question is really related to do I need a thermostat, aftermarket and merc version don’t use them.
And the other is does a partial flow cooler have the same effect as a full flow if it uses the same size cooler. Obviously it only cools half the oil perhaps a bit cooler than full flow, then mixes it back into hotter oil, where a full flow cools the whole lot.
Anyway interested in thoughts.
Thanks.

Why not run a oil to coolant type oil cooler/warmer?
I have Kubota diesels that are up to 27 years old they typically run 140 to 160f and are fine. Don't worry about "over cooling the oil.