Hey folks, I have a an '86 sport edition and recently acquired a fresh engine for it through a raffle at a rotary event. I'm still new to RX-7's (I have only had the car for about 8 months), and I have certainly never done anything like an engine swap before, so I need some advice on a parts list for the build (will make a build thread as well). The engine currently in the car runs well with 116k miles on it, but the clutch is at the end of its life, the slave cylinder is failing, and the transmission input shaft bearing (I think) is making noise in addition to the shifter just feeling clunky and sloppy in general. So I decided to go ahead and swap the engine since the transmission and clutch need to come off anyways. I know I should replace stuff like radiator hoses, spark plug wiring, belts and pulleys, as well as brake/clutch cylinders and lines and all the fluids. Beyond that, I'm not really sure what I should absolutely replace. Would it be wise to do new engine and trans mounts? Basically I just want the drivetrain and all its accessories to perform like new and be headache free for some time to come. Thanks in advance for any feedback.

 

Fuel pulsation dampner, motor mounts, transmission mount with cubes, front differential mount. Verify you have an s4 motor as well. Have injectors cleaned professionally (fuel injector connection, Cummings ga). If you still have original radiator with plastic ends have that rebuilt or replaced. Make sure to get a new Mazda thermostat. No aftermarket.

 

wow, clean, and I love that engine color combo. The above mentioned for sure, I would do the radiator hoses, new vacuum hoses, and I know there is a thread around here somewhere..... about new OMP lines made out of some 3M stuff. If you plan to keep the OMP system the originals like to crack just by looking at them. I have 2 leaking on mine right at the pump... It never ends.....

 

I can confirm the engine is an S4. Everything on the car right now is original equipment, I'll be sure to replace the driveline mounts, and I'll look into the pulsation dampner and injectors. I was already looking into radiator replacement/rebuild, as I have noticed engine temps rising very quickly to about halfway up the guage when going up hills, running the A/C, or doing spirited driving (pretty sure that's not normal) . I've also read the aftermarket thermostats fail/get stuck easily so I'll be getting a mazda one.