My '85 12A is seeping oil from the OMP front plate (the one that's held onto the front of the pump body by two screws and facing the rad).

It has been more noticeable since I installed a metering pump adapter which feeds 2-cycle oil from a separate reservior (this is due to the fact that 2-cycle oil penetrates better than the 4-cycle stuff from the oil pan), but it was a problem even before the retrofit, just not as noticeable.

Mazda's parts dept is closed today (Saturday), so I can't just call them to see if they sell a gasket for this. But they'd probably say "no, but if you mortgage your first-born female child and allow us to take delivery of her on her 17th birthday we'll give you a complete metering pump." IE: The price is bound to be through the roof.My useless Haynes manual is no help either.

My first question is, if I remove that plate will spring-loaded components fly out of the pump body and not go back together?

Secondly, if no gasket available, has anybody ever used silicone or other sealant to fix this leak? I've found that JB Weld and other bonding is NOT impervious to oil, especially 2-cycle oil.

BTW, the metering adapter system has been in place for almost a year and otherwise works fine. It's a gravity-fed system that delivers the 2-cycle oil to the pump and then up to the carb while blocking off oil from the pan. Cost for the adapter was $76 U.S. funds, and it bolts directly between the omp and the mounting pad on the front cover.

 

id recommend just makin a gasket save your self the money it isnt hard at all maybe 5$ and you get a roll of it. hope this helps

 

i used rtv made my own gasket. works great never leaked since.

and how did you do the 2-cycle resivior? i just took off the metal cable that controles the OMP, and blocked off the lines. then add 2 stroke to my gas. but i have always been interested in the little add on's

 

http://www.mazspeed.com/oilmeteringpump.htm

 

Thanks for the info. So taking the plate off is no big deal? Also, what is rvt? Is that the rubbery gasket material used to cut out your own? If so, did it require sealant smeared on each side prior to bolting back on?

As for the adapters, they can be ordered from:

PCV Technologies Inc.
8029 Hwy 1087
DeFuniak Springs, FL
32433

The guy's name is Richard Sohn, and he can be reached at
(850)834-4905. Email address is unicorn@gdsys.net

Prices are $76 for the 12A, $82 for the 13B mechanical pump from 1984 to 1988 models inclusive, $88 for the adapter for the electric pump used on 1989 through 1991 models, and $92 for the one for the 3rd gens.

You'll still need to supply your own reservior, oil lines, mounts and fittings. The reservior's lowest point must be at least six inches above the level of the pump itself, and both the lines and the reservior must be impervious to oil. Neoprene fuel hose works fine, but don't use a plastic washer fluid reservior for the oil--- it will not last. Instead, use a phenolic plastic or metal power steering fluid reservior, or any larger metal container that can be mounted on an innner fender.

 

Thanks for the link Peejay!

 

Ok, having finally found the time to check into the website info it looks like the link (the one for Lowe Performance, who supplies the necessary rebuild components) is no longer available.

The actual gaskets on mine (two required because of my adapter) are new and are not leaking. As previously mentioned, it's actually the end plates located on the fore and aft portions of the omp that are leaking. These are sealed by o-rings. There's also one more o-ring sealing the actuator rod shaft that may also be on the fritz. I'll need to aquire these o-rings and then rebuild the unit with them as these are apparently the only parts that ever wear out.

Does anybody know where I might find these besides Mazda?

Thanks again,

Brett.

 

.... Don't know what ever happend of this... Was searching through threads as I think I'll be rebuilding my OMP tomorrow.

Aviator, those o-rings *are* available from Lowe Performance as part of the rebuild kit, however their website has been down quite a bit, and is no longer in the google cache, apparently.

Just give 'em a ring-- they were great to me.
(941) 924-8597 <-- Lowe Performance Phone Number

 

Thanks for the info. This thread is old news now. I ultimately had our local rx7 guru Max re-seal the end plates and replace the internal seal with a new one. Took me one hour to re and re the pump and him about 15 minutes to perform the seal operation. All is now well.