Fizzpop

Hey guys I currently have a 82 rx-7 with a from mounted oil cooler. I am swapping in a 83 rx7 motor but it has the beehive oil cooler design. Could I just get rid of the beehive and then slap on the oil cooler lines from the old engine to the new one or would I need new lines?

Thanks in advance

mazdaverx713b

iTrader: (91)

Yes you can use the front mount oil cooler. You will swap over your original oil filter pedestal to the 83 engine and use your current oil cooler lines. There's one coolant line that's different on the rear iron I think. I'll have to double check. But to answer your question, yes you can use the fmoc on the 83 engine.

LongDuck

Swapping the oil filter pedestal from your original engine when you remove the Beehive Cooler, is also a good time to replace the 2× O-rings which seal the pedestal to the rear iron. When these deteriorate from heat and age, they all oil to leak from the pedestal which drips directly onto the Heater Hose going to the Heater Core. This is a common failure point of the cooling system, and the hose splits at the worst possible time.

As above, replacing the FMOC hoses now might be a good idea given their age. I went with Racing Beat Oil Cooler hoses and the -AN adaptors and never looked back. Not only do they look great, but they last a very long time.

Frogman

You can get high quality Stainless braided hoses that are a OEM replacement. I don't get the hype of AN hoses unless it's a custom set up. I paid 50$ for the shorty hose from a company that makes braided fittings for bikes, they randomly have a Rx7 section . Fit perfect .

peejay

You will either need a 5/8" cap for the extra coolant fitting, or just saw the tee off at the tee, leaving as much as possible to clamp the heater hose on.
I suggest the latter. The caps available tend to fail after a couple years. This happened to me late at night on the road, I did not have a spare cap but I did have an inverter, extension cord, and 110v reciprocating saw