No oil through OMP lines after rebuild
 

Hi everyone,

I noticed no oil going through my OMP lines after my rebuild first start. I kinda freaked out and shut the car off after maybe 30 seconds. I did premix and lube the housing before the start up in fear that the OMP wasn't going to work.
How long after a start up should I see oil flowing through the lines?

Moe Greene

It takes a while for oil to start moving through, it goes through slowly. I have a thread somewhere about pre-filling the lines with oil.

Dale

It takes a while for the lines to fill with oil and like Dale said, Mazda recommends filling them before installation. This is a pain in the ass so I always add premix to new builds. In fact, I feel every rotary benefits form premix.

My thread on filling the OMP lines -

https://www.rx7club.com/3rd-generati...lines-1100719/

It would be a ROYAL job to do this once the motor is in the car. I would probably just let the car idle and run with no load until the lines have oil in them. You should have plenty of assembly lube in there.

I've done many engines over the years with dry OMP lines. I typically run the engine for 15-30 minutes at idle and maybe revving a bit in the driveway until it's warm, then change oil and filter and let it cool to make sure the coolant is topped off. Then start driving. I've NEVER had a problem with it. The motor that's in my car now that I built 10 years ago I started just like this with dry OMP lines and no premix and it's still healthy as a horse.

In general, I think it's a good idea to pre-fill the lines. But, I don't think you're hurting anything not doing it.

Dale

Are you using a gasket on the front cover? I have seen many failed DIY builds where the builder filled the omp supply passage with RTV, when not using a gasket.

Very good point.

I did...something...to fill the lines when I rebuilt my engine...but damn if I remember it now! I put the stainless lines on and was worried about not being able to see any flow. I seem to recall using a little syringe I had...probably all just ended up draining into the engine, but it made me feel good, lol!

I'm using a metal front gasket, no RTV.

I will start the car back up again and let it idle while watching the lines, in the meantime I have to figure out whats going on with my clutch pedal/slave cylinder.