Hey guys, I have a couple of problems concerning my secondary injectors and a coolant leak.

First of all, I searched and I'm pretty sure I found the problem, I just need some advice on how to fix them.

I'll talk about the injector first (it freaked me out when I first saw the problem). I started my '88 10AE for the first time in awhile a couple of days ago. I'm in the process of converting all the bolt-ons back to stock, but leaving other upgrades such as stainless steel lines, S5 turbo, Walbro FP, etc.

Now, I got about halfway through (removed FMIC, BOV, added stock airbox) when I decided to start the car. It started fine and was running ok (idled fine and all that) but I noticed when I revved up a little (around 4k rpm) it wasn't as smooth. I figured it was just 'cuz I hadn't started it in awhile. I checked under the hood anyways, and everything was fine EXCEPT when I look around the UIM and the secondary fuel rail there was fuel dribbling out near the injector! I freaked out and turned off the car. It was getting dark so I rolled the car back in the garage and decided to leave it alone for now.

Today I started taking it apart to get to the fuel rails and such, but I couldn't find anything wrong. I decided to take the injectors out, and found this.


Notice near the top the O-ring (I think) was all broken and crap. This was from the injector that was visible and the one leaking. I'm pretty sure this is the problem, because when I put it back into the rail to see if it would seal, it didn't and you could see that the fuel could have came from there. So how would I go about fixing this problem? The material is hard plastic, is there a different kind of ring (like somekind of rubber that can't crack) that I can put in? Is this what's causing the problem? The other injector was fine, but I'd like to replace its ring so that I don't come across this problem again.

Also, notice how the injector is like rusted or something. Both are like this. When I got them serviced, they looked brand new. I only drove the car every now and then, maybe a total of 20 times since I put those injectors in. I'm pretty sure they're rusted because of some coolant leak, which is causing maybe steam/fumes to go on the injectors to contribute to the rusting. Under the hood, it smells like coolant when the car is running, and sometimes you could see like steam or whatnot coming from the area near the manidfolds/turbo. I'm thinking that I installed the LIM improperly (I took the motor out awhile back), and that maybe the o-ring inside isn't on right. Could this be causing the problem? If I want to take the LIM off, will I have to take the turbo out and everything, or is there a way to reach the bolts without doing all of that?

Sorry for the long post.

P.S. I forgot to ask, does anyone know where I can get the small, thin cotter pins for the OMP/Throttle body linkage/connecting rod? I'm gonna need to replace mine on both ends, and they don't have them in the local auto store that I've checked.

Thanks in advance.

 

A- You could use paper clips
B- You can go to autozone and get injector o-rings for the car and that will solve the problem, only like $3, just bought some for a rebuild.

 

Option B sounds good.
Any advice on the coolant problem? Can I take off the LIM without taking off everything else?

 

If coolant is leaking and causing the injectors to rust up I'd look at the lines to the TB. They are above the turbo, so that could explain the steam form that area maybe. Good luck with those lines!!!

 

Which lines? I removed all emissions, if this makes any difference.

 

injector o-rings? Are they a special o-ring? I thought a rubber o-ring was a rubber o-ring?? I have a million of these in my work van. Maybee I should replace mine just because.

 

there are water lines that run to the TB, they are small and way bent out of any shape you could possibly think of getting rubber to bend to; but, they are there. I'd post a pic but it is dark..... maybe tomorrow I will post some and photoshop some directions. Look at the far passenger side end of the TB. Above where the UIM connects into the TB, just left and above of the connection you will see a rubber hose with some water hose clamps on them into what could otherwise be vac intake spots. that's the hose I'm talking about.

 

And BTW O-rings can get real hard when they get old.

 

When I say o-rings, I mean the black ring thats right about the connector. I'm not sure if its officially an o-ring, but you'll see what I'm talking about. Just look how its chipped or what not. Because of those chips, that ring didn't seal the distance between the rail and the injector, and I think thats where the fuel came from. That ring was already hard plastic though (or maybe it was soft, and just hardened and I didn't realize it), I think when I was putting stuff back on, I tightened something too tight and it broke or whatever. But anyways, I hope this is the o-ring you guys are talking about. I have the rings from the injector to the LIM, and those are fine right now.

A picture would help alot. I'll check it out tomorrow (its too dark right now).

 

Don't replace just the o-rings either... replace the grommets too...

 

Can someone clarify which is the o-ring and which is the grommet?

 

The o-ring is at the top of the injector. It's the ring that looks like an "o".

There are two grommits: the upper grommit located just below the o-ring which is visible in your picture, and the lower grommit which goes between the injector a and the block (may still be stuck in the block/intake).

 

Got it. So I'm guessing my problem was that the grommet was all busted up and I needed new ones. Should the grommet be hard plastic or like a rubber/flex material? I can get these at an Autozone right?

Also, anyone know where I can get those really small cotter pins (I checked Pep Boys, didn't have 'em).

 

Not that I know of... mazdatrix.com