normal to look like this?

[eclimax13]

are my o rings leaking?...or is this normal to collect crap around the injectors?

[A4ringedONE8T]

Yes thats normal and they are not o-ring sealed

[diagnosticator]

Yes thats normal and they are not o-ring sealed

The injectors are sealed with 2 "O"Rings on each injector.

[F16HTON]

Correct, all A4s eventually get all of that buildup there. Unfortunately on a boosted car, there will be a very tiny bit of blowby of the injector seals, in addition to that is is a valley in which dust and dirt can accumulate.

You can clean the area with brake parts cleaner, or you can detail the motor. You do need to be careful I you are spraying water directly on the motor as steam and condensation can get into the electrical connections, particularly the coilpacks, you will see misfires upon startup and most likely store a code.

[eclimax13]

eh..doesnt bother me as long as its not a problem..thanks

[B6driver]

i have the same (if not a little worse) build up of grime in that area. whats a good cleaner? simple green? i also have some Nitro Wash (R/C car cleaner) that works really well with oily grime on my RC?

[oildrpr]

just use brake cleaner. you dont want to spray simple green on your motor, that stuff is slimy, will smoke and smell once the motor is hot..

[fitch303]

I just changed all 4 of my o-rings due to leakage. Very simple to fix and takes about 10 mins including the cleaning.

[A4ringedONE8T]

The injectors are sealed with 2 "O"Rings on each injector.

Is he talking about the INJECTORS? No ....

[A4ringedONE8T]

I just changed all 4 of my o-rings due to leakage. Very simple to fix and takes about 10 mins including the cleaning.

What your seeing there has nothing to do with the injector o-rings, it is blow by that seaps back up through between the manifold and the injector seat, just as Greg described

[eclimax13]

Is he talking about the INJECTORS? No ....

yes i was

[F16HTON]

At first glance it looked like you were talking about the coolant leak at your bleeder valve

[diagnosticator]

What your seeing there has nothing to do with the injector o-rings, it is blow by that seaps back up through between the manifold and the injector seat, just as Greg described

Yes, one "O" ring for the injector to intake port seal, the other "O" ring for the injector to fuel rail seal. They both tend to seep a little fuel, (especially the intake port seal, with the higher heat stress.) after the O rings relax due to aging.

[fitch303]

What your seeing there has nothing to do with the injector o-rings, it is blow by that seaps back up through between the manifold and the injector seat, just as Greg described

My o-rings failed and caused my mess, I have since cleaned it all up and with the new rings in place no more leak.

[A4ringedONE8T]

Yes, one "O" ring for the injector to intake port seal, the other "O" ring for the injector to fuel rail seal. They both tend to seep a little fuel, (especially the intake port seal, with the higher heat stress.) after the O rings relax due to aging.

The dirt/shit stuck to the injector seat is not from the injector o-rings leaking, its from seepage around the injector seat, again nothing to do with the o-ring on the injector ...

[A4ringedONE8T]

yes i was

As I said ^^, the crap that collects at the edge of the injector seat is from seepage around the injector seat, not from the o-ring seal. The pictures you posted where there is dirt/grime stuck to the injector seat is at the seat/mani seal, not at the injector o-ring seal. In your case, changing the o-rings on the injectors will do nothing to solve the problem

[diagnosticator]

The dirt/shit stuck to the injector seat is not from the injector o-rings leaking, its from seepage around the injector seat, again nothing to do with the o-ring on the injector ...

Note reference numbers 6, injector seat O ring seal, and 8, injector to fuel rail O ring seal.

[A4ringedONE8T]

Note reference numbers 6, injector seat O ring seal, and 8, injector to fuel rail O ring seal.

No shit ... whats your point?

[A4ringedONE8T]

Stop thinking your technical bullshit for one second and listen to what I'm saying. The shit stuck to the injector seat in his picture is NOT FROM EITHER OF THOSE O-RINGS LEAKING!!!! It is from seepage around the injector seat where the injector seat seals on the intake manifold. INJECTOR SEAT TO INTAKE MANI SEAL ... again, NOTHING TO DO WITH AN O-RING!!!!

[phoenixr2]

are my o rings leaking?...or is this normal to collect crap around the injectors?

Is he talking about the INJECTORS? No ....

What?

[A4ringedONE8T]

What?

Read the thread, the collection of dirt and grime around the injectors is caused from seepage between the injector seat and intake manifold, not from the injector o-rings. So to answer his question, no the injector o-rings are not leaking. The injector seats are, a very typically issue with all 1.8T's

[A4 TSCHUSS]

Shawn just say those plastic injector seats are leaking through the treads (they screw in to the intake manifold) The cause of that crap on the intake is from stuff getting through the threads on the intake manifold and making its way up between the manifold and the plastic injector seat. Fuel isnt actually coming out of the fuel rail or isnt coming up from the center of the injector seat where the injector goes in but from the threads where the seat screws into the mani.

Maybe they will comprehend that better.....

[eclimax13]

didnt mean to start a bitch fest...christ we get it already...its normal../thread

[diagnosticator]

Stop thinking your technical bullshit for one second and listen to what I'm saying. The shit stuck to the injector seat in his picture is NOT FROM EITHER OF THOSE O-RINGS LEAKING!!!! It is from seepage around the injector seat where the injector seat seals on the intake manifold. INJECTOR SEAT TO INTAKE MANI SEAL ... again, NOTHING TO DO WITH AN O-RING!!!!

OK, I understand what you are saying, but the plastic injector seat inserts are threaded into the manifold, and are installed at the factory using sealant compound. Therefore, it's unlikely the seepage is between the injector seat insert and the manifold casting. The reason is that the assembled joint, (with sealant applied before threading into the manifold,) will not seep fuel unless the sealant is misapplied or the inserts are not sealed properly for some other reason. Finally, the O ring seals move a little bit with temperature changes and vibrations, and it's that movement when added to the effects of compression set of the O ring material that allows the seepage past the O rings. After cleaning the fuel residue away, the seepage will be seen to migrate away from the O ring seal area, not from the injector seat insert to manifold joint.
If the inserts where removed and reinstalled without the specified sealant, then there will be seepage from that joint as well as from the O rings.
As you correctly posted before, the typical seepage and resulting fuel residue is not a problem as long as the O rings are not leaking false air into the manifold. (IE vacuum leaks.)

[F16HTON]

FWIW at 32psi once I blew the injectors right out of the intake manifold From that point forward I used a tiny bit of loctite on the two capscrews that hold the fuel rail down.

[AudiA4_20T]

stop Thinking Your Technical Bullshit For One Second And Listen To What I'm Saying. The Shit Stuck To The Injector Seat In His Picture Is Not From Either Of Those O-rings Leaking!!!! It Is From Seepage Around The Injector Seat Where The Injector Seat Seals On The Intake Manifold. Injector Seat To Intake Mani Seal ... Again, Nothing To Do With An O-ring!!!!

Loud NOISES!

[PCYC]

Brake cleaner great idea

[smarrick]

OK, I understand what you are saying, but the plastic injector seat inserts are threaded into the manifold, and are installed at the factory using sealant compound. Therefore, it's unlikely the seepage is between the injector seat insert and the manifold casting. The reason is that the assembled joint, (with sealant applied before threading into the manifold,) will not seep fuel unless the sealant is misapplied or the inserts are not sealed properly for some other reason.

I mostly agree with you but the seats do not seal fuel what so ever. Niether does the lower o-ring they only seal intake manifold to atmosphere. There is a possability of fuel being mixed with the air when something is leaking.

Also that's great that the factory used sealant. Most everything has some kind of seal or sealant on it and since 2 piece rear mains on model-t's everything can fail and leak and usually at some point does.

[coowhip]

Loud NOISES!

LMAO!

[fitch303]

Back from the dead. I was wrong, it was the injector seat and not the orings which were leaking. Is there anyway to replace the seats?

[kwimberly]

Back from the dead. I was wrong, it was the injector seat and not the orings which were leaking. Is there anyway to replace the seats?

those are the ones that screw in, right? Take off the IM, unscrew the old, screw in the new? I need to do the same thing.

[fitch303]

I wasn't sure if those pieces could be replaced