S4 OMP rebuild - Parts required?
 

The OMP on my 87 rx-7 is leaking pretty badly so I am looking for a parts list of what is required to rebuild / reseal it. There is a user on here who has a thread advertising O-ring kits for a very reasonable price however he is not responding to PMs or posts in his thread so I am hoping maybe somebody on here knows what exact O-rings are required to rebuild this thing myself? I have been searching for a while and I just can't find the O-ring sizes or a good picture guide.

There's a thread in the FAQ with the orange a place to order I got like 50 for 5 bux

I just took my disassembled omp down to my favorite seals shop. The guy there measured the fit of each part with some calipers and got me exactly what I needed. Was only $10 or so

Awesome, thanks for the link. I should have just thumbed through the archives in the first place :)

On a related question, for those who re-sealed their OMP's with viton O-rings years ago, how are they holding up? Still leak-free?

:wave: wow that was a long time ago

Though I dont own the car anymore, the OMP I refurbed in that thread is still running around town leak free

BTW that direct link doesnt work anymore, just copy the partnumber and search on their website

This link might help because if you pull the omp you might break a line.
https://www.rx7club.com/forum/showthread.php?t=348068

I have some new PFA lines to replace the old ones with. They feel extremely brittle and since I am pulling the UIM to fix some vacuum leaks I figure I'd just replace them while I was in there. I was checking to see if the OMP end of the lines was leaking when I found the oil leak at the pump. Thanks for the tip though :)

I did the lines and the o'rings on mine 2 years ago. Not a drop.