Templeswain

Well now I'm moving on to my 86 which has a rebuilt engine in it. Shortly before I swapped out my stripped 87 gxl to my new 91 I sprung this monsterous oil leak in my 86. I have 3 fc's

Now I'm pretty sure its the omp. Because I installed new oil lines for the omp, and the bottem of these lines were caked in dirty oil plus they were empty of oil also. I can tell that they were empty because new oil lines are pretty white and clear so you actually see the oil, or lack there of, in them. And there's a puddle of oil below the omp too.

I just wanted to know how many of you have sprung a leak here and any experience you have had with an omp blow out.

The leak was so horrendous that from the time I discovered it, and filled the engine up with a quart of oil five miles later that quart was gone.

I can't imagine the leak coming from the pan because it
just doesn't seem possible and the pan gasket is new from the rebuild that only has 10 K miles on it. I also think that the pan holds the oil that gets sucked into the engine by the omp. If the pan contained pressure to circulate the oil, then maybe I would think it was the pan gasket and could see the possibility of oil being pushed out through the pan gasket by pressure. But I don't really know for sure though.

It would seem that 30 plus pounds of variable oil pressure coming out of four holes that are about a 1/16 in diameter to each line would be a prime candidate to literally spray it out of the omp somewhere. Trouble is, upon inspecting the omp there's no somking gun as to where the oil would have come out of. The lines aren't broken either.

What happened when your OMP blew up?

Jamison182

HHHmmmmnnn.......Soiunds like the eact problem ive got right now. My problem may be that it was leaking evan above the OMP because mine looks perfectly fine too. Mine seems to leak right off the oil pan, frame, and engine mount.....Im thinking that is it not an OMP for me but rather the front of the block has a gasket which might be bad, sign of engine going out....Im pretty scared to so your not the only one, here are some pics of my disaster....



It all seems to be dripping from the somewhere up top, and running down into the OMP area, but im not sure yet....well see, im also seeing small drips of coolant..

Templeswain

Yup, that's exactly what my pan look like right now. As if it collected from somewhere and seeped along the pan in the omp section. And also dripped on the main front suspension plate. But I don't have anything coming from above. I can't see how it could come from the oil injector lines that are attached above at the manifold and housings. I know I would see oil there and there's just no evidence of a leak under the throttle body.

Oh well, I have 2 more omp's available to me, and I just got finished putting in a replacement one I know never had a problem. So we'll see if that fixes it. Otherwise I'm doomed and I'm tearing the engine out. I can almost do it in my sleep now though.

One thing I did notice on the suspect omp was that there was alot of drippy oil clinging to the spring part of it.

You can't see it in any of your pictures, but its the behind your radiator hose, and this part of the omp connects to the rod that is attached to your throttle body. Does it have a lot of oil, kind of just sitting on it like a big oil tear drop?

1987RX7guy

iTrader: (3)

https://www.rx7club.com/attachment.p...postid=2361659

Give up that junk.

Aaron Cake

iTrader: (1)

If it really is the metering oil pump, fixing it should simply involve replacing a 50 cent o-ring.

HAILERS

It's probably leaking from the spring area. Also check and make sure that the oil leak is not coming from the eccentric shaft pulley bolt. Put your finger inside the pulley area and see if it's wet with oil. NOt wet..ok. Wet...leaking copper washer and not tight enough.

The omp is not junk. Pouring oil in a gas tank is junque thinking.

Jamison182

YUP! Lots of drops, and they all drip off the oil pan, engine mount, and frame. im gonna take some brake cleaner to it next and clean it off. But the funny thing is there is not much oil above the OMP, so I have a feeling its something around there......Why do you ask?

Templeswain

I think because it may somehow be leaking from the spring end. There's these two screws on the end of a plate that's capped off back there. Although there's no big hole in it that would be intuitively obvious as the cause of the leak.

Yeah, I'm pretty sure its the omp itself and not the seal.
I got the "Right Stuff" gasket sealer and it works awesome for resealing components like these. So if it was a faulty seal, even though it was a new one from the rebuild, it isn't now.

I'd love to tell you if this solved my problems but she's been sitting for a little over a month. Yesterday and today its about 20 degrees outside. These two factors never help.

I won't even go in to the Why-won't-my-rx7-start-thread. I know its going to be a battle for initial start up. They just get so damn pissy. But when it warms up a little outside I'll tell you if I still have a leak.

Jamison182

Damn you said a mouthfull! I feel your pain, my rx7 has been sitting for about 2 months now cause of this oil crap. Im probably gonna take it to a local shop, no rotary experts, but I would assume those guys can find a simple oil leak...good luck templeswain!