paw140

Ok guys,

I'm in the middle of doing the vacuum hose replacement job and tracing a gas leak. I'm replacing the fuel pulsation damper (even though its not leaking), and all the injector o-rings. When I removed the primary fuel distributor (the thing that holds the primary fuel injectors), I found that one of the o-ring seals that seals the fuel distributor to the engine housing was completely mangled. However, I can't seem to find this part in my shop manual, or on Mazda's part diagrams.

The only seals that the exploded view shows are the two injector o-rings, and an injector insulator for each injector that sits on top of the air bleed socket (I think thats what its called). However, there are two other o-rings that seal the fuel distributor against the engine block. They sit right on top of the holes where the fuel distributor and injectors go into the engine, This is the part that I need, and I can't find it on any diagrams. I went ahead and ordered the injector insulator, hoping that this o-ring would come with it, but I kinda doubt it.

For anyone that has had the primary fuel distributor off before, please help! I definitely need this seal before I can put the car back together!

Thanks,

Paul
94 RX7

kevinmfaust

I think that is all that is there. The O-ring and insulator. I just did my engine and that is what I put back. Maby that is why it was mangled, because it was not intended to be there. There is an O-ring like thing on the top of the mixing plate. You can see this part when you remove the other O-rings. The mixing plate helps atomize the fuel and is inside the injector tunnel. Look on page C-37 in the work shop manual. It says to replace this part in a rebuild. If you pull it out be very carefull it is brittle and if it breaks you will have more dismantling to do to retrieve it.
Kevin

paw140

Does the insulator for the primary injectors, the one that you replaced, sit on a ledge just inside the hole in the engine housing (is it flush with the mounting surface of the fuel distributor?), or does it sit kinda deep inside, right on top of the mixing plate?

I'll try and post pictures of the o-ring I'm talking about because it very hard to describe.

Paul

Wargasm

You're talking about the little O rings that go where I've pointed to in this picture right?

Brian

paw140

Wargasm: Yeah, those are the ones.

Are those the insulators that I ordered? Did I order the right part (I ordered the insulator shown on page F-105 in the manual)?

I attached pictures of my o-rings. The two on top are the ones I'm talking about. The one on the left is the bad one (obviously). The o-ring on the bottom is an insulator from the secondary injectors.

I hope I'm not being retarded and getting worried about nothing. I probably ordered the right part.

Thanks guys,

Paul

Wargasm

Sorry to say this but...

I believe that item #12 on page F-105 is actually the rubber insulator pictured in the BOTTOM of your image.

I looked on my parts microfische (PDF format heh) and I couldn't find the right ones... I know that Mazdatrix sells them to you when you buy a "93+ gasket set"... try calling them???

Brian

paw140

Yeah, I looked in my .pdf microfische, and can't find them anywhere. I went to the Mazda dealer this morning, and worked with the parts guy trying the find the right seal, and we came to the conclusion that the one I referred to on page F-105 was the only one it could be. But I'm worried because it doesn't look like the seal I need.

If anyone else has any info, please let me know. The parts should come in Thursday morning, and I'll find out then if I ordered the right ones. But I REALLY want to get the correct parts by Friday so I can put it back together this weekend. I don't know how much longer I can stand driving my beater Chevy Beretta .

Paul

m_snoby

I have the exact same question. I think mine maybe leaking and I sent all my injectors to RC Engineering for rebuilds. I have not taken out the solenoid rack and I haven't yet taken the "fuel distributor " off of the engine. For those that have done this, can I leave the solenoid rack in place and take the fuel distributor off?

m_snoby

oh and I forgot to say
Thanks in Advance!

paw140

I'm surprised you were able to get your injectors out without removing the solenoid rack. I'm pretty sure you need to remove the rack to get the primary distributor out... if I remember right, its almost directly underneath the rack.

By the way, the o-rings shown in the parts catalogue (the ones I ordered from the dealer) are the correct ones.

Paul

m_snoby

Ok, now I am confused.
I removed the solenoid wrack and I also removed the primary injector distributer...
I had the air bleed things of course and I had the big rubber o -rings. BUT NO INSULATORS!!!
I think Dave left them out in the rebuild. Anyway my Mazda dealer had the insulators in stock so I got those however, they (like us) don't see in the parts any of the larger o -rings that are the original o-rings that paw140 and I are looking for.

Anyone?
Need a little help please,

paw140

The picture in the parts catalogue confused me as well. Their picture sucks. You need the insulators. P/N NF01-13-257A.

This is what I ordered from the dealer, and it is the correct part. P/N NFA1-13-257 are the insulators for the secondary injectors, and you'll probably need those as well.

Hope this helps. I did end up getting all of the correct parts, so let me know if you need any more help.


Paul

m_snoby

You are 100% right about the insulators P/N NF01-13-257A. I picked these up from my dealership, however these are just the insulators and not the O - Rings. Did your dealership give you the o - rings with the insulators?
Thanks, sorry to keep you on this topic.
Matt

wasabi

Looking at the parts fiche, it seems that the secondary injectors have an o-ring between the 'insulator' and the 'air bleed socket' but primary injectors do NOT. Did you get any clarification on that from the dealer??
-MP

m_snoby

Actually when I took the primary distributer off, there were large o rings there. So I'm pretty sure there are suppose to be some o -rings at that location.

j9fd3s

iTrader: (3)

N3A1-13-257 is for the primary rail
NF01-13-257A is for the secondaries

mike

m_snoby

I completely agree with that for the insulators, however I removed some o- rings on the primaries that are not listed. Could it be the person that rebuilt the engine placed o-rings there instead of the insultors. However paw140 stated that when he disassembled his there were insultors and o rings.

paw140

When I dissassembled, there were exactly two seals that sealed the primary fuel distributor to the block. I mistakenly called these o-rings, when they are actually called insulators. Other than the injector o-rings (which I'm pretty sure you're not talking about), these were the only seals that I replaced. See the picture I attached in one of my early posts. The two seals on the top are the insulators (13-257A), and the seal on the bottom is the insulator for the secondary injectors (13-257).

I didn't remove the primary air bleed sockets, so I don't know if there are any seals for them.

The only seals (insulators) that I replaced, and the only ones that were on my car, were 13-257A and 13-257.

Good luck...

Paul

m_snoby

OH!
Ok, I see what you mean. I think that the reason that I was confused was because Dave at KD Rotary installed the wrong type of rubber seal. on the primary injector distributer.
Thanks a TON guys I appriciate all your help with this!