hey everyone i have a 1982 rx7 that has the oil cooler that is mounted underneath the radiator and i found that it is ruined...the core of it is shot and leaking oil like crazy....now i need to get a new one but everyone wants to sell me the one outta the 83 model.....what is the difference between the 2 oil coolers and is it possible for me to mount the 83 oil cooler without many modifications

thanks parker

 

The 83 cooler is the one that is underneath the oil filter and is not very efficent, all coolers
79-82 are under the radiator, that is the one you want, i have 2 of the pm me with an offer
rx7doctor

 

Have you ever cut open an oil to air cooler? It is 100% crap. The turb is not brazed to the tubes, and does not travel the length of the tube. The oil to air cooler only works because of its size. I replaced mine with a high efficiency cooler that is about 1/2 the length and 1/2 the thickness, and my temps have never been cooler.

The oil to water is much more efficient considering its size, but this due to the fact that water can absorb more heat than air. Also, the oil to water cooler works even in stop and go traffic.

It is pretty strainght-forward to mount the beehive, the most difficult mod would be t-ing the coolant line that runs from the rad to the heater core, and running the t to the OTW cooler.

 

Your going to get alot of flack onthis one, check your threads and bulletins on beehives.
Prepare to be bombarded, lol. rx7doctor

 

Yeah, I put my flame suit on, but facts is facts. My fiance works in R&D for heat exchangers, and when our oil to air cooler cracked, her boss let her exchange ours for an equivalent one. After cutting it open and analysing the design, she cambe back with one that is 1/2 the size. I didn't believe it would work until I saw it. Oil and water temps are very low.

 

Did you have to switch over to an fittings for the hoses to make it work? rx7doctor

 

They brazed on fittings that they had on hand, and I spent some time at a hydraulics shop matching threads and such and getting some custom 5000 psi hose made up.

 

Pics Please. And where could we get one?