I got a real good oil cooler . Thought about running my trans to the external cooler and using the old cooler in the radiator to cool my motor oil. Bad idea?

Sorry.....99 obw 2.5

you can. make sure the radiator is cooler than the oil.

 

not much to gain unless you're racing, towing, adding forced induction, hardcore offroad, etc.

i've seen it done in a fair few (non soob) veihcle's so i don't see why it wouldn't work

first, the trans oil cooler in the radiator, doesn't it also warm the trans fluid in certain conditions? is the radiator ever warmer than the trans ? i thought the radiator ''controlled'' the trans oil temp, maintained it tot the correct temp.

 

why not just add an oil cooler for the engine oil?

 

where do you ''tap'' the engine for the motor oil?

first, the trans oil cooler in the radiator, doesn't it also warm the trans fluid in certain conditions? is the radiator ever warmer than the trans ? i thought the radiator ''controlled'' the trans oil temp, maintained it tot the correct temp.

 

why not just add an oil cooler for the engine oil?

 

where do you ''tap'' the engine for the motor oil?

 

That last one is the big question- you would certainly not put the pressurized feed through the trans cooler, it's far too small and not built to withstand internal pressure. So, you'd need a circulation pump.

 

 

I would suggest using the water-oil cooler from an H6, keep the oil where it belongs, bring the water to the oil.

 

In the winter I think there is a huge advantage in having it as an oil-warmer, as well.

 

Dave

that's a good point, i wouldn't want the extra travel for the oil.

 

some EJ25's came with an oil cooler that the oil filter piggy backs onto. screw it on to where the oil filter goes then the oil filter goes on top of it. it has a coolant supply that comes from the water pump i think, so you might need a certain style water pump...or pull coolant from elsewhere, i forget how they work (eventhough i just removed one a month ago!) $25 and i'll send you the one i have.

i think the foresters , or at least some of them , came with those. 99s maybe, or 00..

i think the foresters , or at least some of them , came with those. 99s maybe, or 00..

mine was off a 2000 forester and is now sold (someone saw this thread LOL). have no idea what they came on but H6's have them too.

Edited September 23, 201114 yr by grossgary

item #5,

 

http://opposedforces.com/parts/forester/us_s10/type_13/lubrication_system/oil_cooler_engine/illustration_1/

 

part number, 21311AA010, and usage,

 

http://opposedforces.com/parts/info/21311AA010/

'91 Legacy Turbo's also had an earlier version of the same unit. Actually I had to snap up GG's that he mentioned above because the original cooler on my '91 is clogged on the coolant side and full of metal on the oil side so I need a replacement for the '93 TTW engine it's got now.

 

GD

that's a good point, i wouldn't want the extra travel for the oil.

 

some EJ25's came with an oil cooler that the oil filter piggy backs onto. screw it on to where the oil filter goes then the oil filter goes on top of it. it has a coolant supply that comes from the water pump i think, so you might need a certain style water pump...or pull coolant from elsewhere, i forget how they work (eventhough i just removed one a month ago!) $25 and i'll send you the one i have.

 

 

Same style on all the H6s.

 

Dave

first, the trans oil cooler in the radiator, doesn't it also warm the trans fluid in certain conditions? is the radiator ever warmer than the trans ? i thought the radiator ''controlled'' the trans oil temp, maintained it tot the correct temp.

 

why not just add an oil cooler for the engine oil?

 

where do you ''tap'' the engine for the motor oil?

 

BINGO

Yes it not only removes heat from the transmission but helps heat up the transmission.

 

May i ask why you feel a need to do this. SUbarus tend to run forever so this not a weak point in the engine. If you want to do it use an external cooler with a T-stat built for this.

Oil coolers are VERY helpful. They will pay for themselves in longer oil change intervals over the life of the car.

 

They are pretty much standard on the turbo's (as they should be). And the non-turbo's that have them seem to be some of the longest lived engines subaru has ever made.

 

And yes - you can't just run a cooler - you need a thermostat to keep the oil from getting too cool or you need to cool the oil with engine coolant to keep it the same temp.

 

GD