Oil Cooler???

[AZFX4]

So Im in the process of swapping a 4.0 into my B2. I have decided to use an remote tranny cooler and electric fan for the trans. I am shopping around for a replacement radiator for the engine and notice that these all have the built in tranny cooler. Has anyone ever used this for an engine oil cooler? Seems like a waste to just have a cooler thats not being used. Couldnt I just use it for the engine oil?

 

[Ozwynn]

I would not if I was you bypass that radiator cooler. I would use it in a addition to your remote cooler..... If you want an oil cooler you can buy a generic cooler at autozone. I use one for oil and one for transmission.

 

[AZFX4]

Well...what would be the difference in using that or using a remote cooler?

 

[holyford86]

That trans cooler won't be able to handle the volume of oil flow, lines are too small. I had an oil cooler on my 2.9 and I contemplated swapping it to the 4.0 but I really didn't need it, the 4.0 doesn't work hard enough.

 

[Ozwynn]

a remote cooler by itself is not enough to cool the transmission. you need the one in the radiator to pre-cool the transmission fluid, then it runs into the auxiliary cooler. set your transmission cooling up right and buy a generic cooler for the engine oil.

 

[AZFX4]

a remote cooler by itself is not enough to cool the transmission. you need the one in the radiator to pre-cool the transmission fluid, then it runs into the auxiliary cooler. set your transmission cooling up right and buy a generic cooler for the engine oil.

Really? The remote cooler I bought is a hell of a lot bigger than the shitty little one that the tranny had before. How is a bigger cooler not going to be enough?

 

[Ozwynn]

alright .... you live in AZ. Land of extreme heat. a bigger cooler IS better. I have burned out more automatic transmissions than you got fingers and toes and they have all died from heat....... I even killed a 4L80e (perhaps the strongest automatic on the planet for a pick up before the 6spd allison was available in the silverado) in Michigan when it was 15* below 0*F.

an Auxiliary cooler is not sufficient to cool the box by its self ...... it would not matter if your cooler was the size of a big rig radiator. For a daily driver and week end wheeler you need to pre-cool the tranny fluid using the built in cooler before going into the auxiliary cooler..... it helps to maintain the fluid in the proper temp range of 150*-170*F.

Its truck, do what you want. but ..... you have been warned.

 

[AZFX4]

Thanks, I posted this over in the tranny section too. My dilemma is I jacked up all the stock hard lines when I pulled the tranny so I would have to make new lines or run hose I guess. I know more cooling will certainly be better. Thanks for your help.

BTW...The stock tranny cooler was external (not built in) to the radiator in the first place. if that makes a difference.

 

[Ozwynn]

it should have had one built into the radiator.

 

[AZFX4]

Nope. Nor did the 91 explorer that I pulled the 4.0 from the both had the exact same little dinky trans cooler in front of the radiator.

 

[Ozwynn]

yeah ....... I had a 91 Explorer. it had a cooler in the radiator and an auxiliary cooler in front of the radiator.

 

[AZFX4]

Well I have both radiators and they dont have any hookups for tranny lines either.

 

[flatblack]

Dude, first off I was in AJ for 6 years with my Nissan Titan, I HAD to add the extracool cooler to my tranny after the radiator cooler with an aux electric fan just to get the fluid to 188*F. If you don't have the cooler in the radiator you are really askin for trouble bro. Save the money and get a radiator that has the cooler in it and use the external one you have { AFTER } the radiator cooler. You will be way ahead.

Well I have both radiators and they dont have any hookups for tranny lines either.

 

[AZFX4]

Dude, first off I was in AJ for 6 years with my Nissan Titan, I HAD to add the extracool cooler to my tranny after the radiator cooler with an aux electric fan just to get the fluid to 188*F. If you don't have the cooler in the radiator you are really askin for trouble bro. Save the money and get a radiator that has the cooler in it and use the external one you have { AFTER } the radiator cooler. You will be way ahead.

Its not about saving the money, all of the radiators seem to come with an internal cooler which I was planning not to use but I guess Ill go ahead an use it. I will just have to run some hose up to the cooler now since I trashed all the hard lines.

 

[flatblack]

dammit man, trashed hard lines sucks, its not that bad to make new ones. all you need to do is get in touch with applied industrial hardware or call OMG I forgot the name of that place in Mesa that specialize in hydraulic fittings and hoses, its off of baseline and S. Macdonald just east of Country club dr......granberry supply company, These guys are the best. I used to have them make new brake lines for go- karts and fuel lines for mercury outboards.