chouwalker

I have my fuel rail off as part of a turbo swap. I inspected the injectors and found that 3 of them have cracked plastic at the tip (see photos below).

Do I need to replace these injectors, or is the cracked plastic inconsequential? Before I had the car apart, the injectors were working just fine (as far as I could tell anyway).

BTW - At a minimum, I plan to replace the injector O-rings.

hosrom_951

You could get a fuel injector seal kit which includes the cap.

It's cheap $4 per kit from rennbay (www.rennbay.com)

I would also suggest sending out your injectors for cleaning (at a pro).

chouwalker

Hosrom,

I just ordered the injector seal kit for all 4 injectors. Thanks for the info.

Next question, how do I find an injector cleaning place in my area? What sorts of shops do this work?

hosrom_951

Well, i don't know in the US, but here in Dubai, i went down to the Bosch service centre (the injectors are Bosch ) and had them cleaned, re-sealed and reconditioned by them.

tconn

MARREN FUEL INJECTION is the place to have your injectors rebuilt.
They will clean them flow match them and install new seals very inexpensively.
www.injector.com

MitchB

Marren!
Just got mine back - they give you before and after specs. $104.57 for four with shipping...

PorscheDoc

What if you think your injectors are leaking, can they solve that through the cleaning/rebuilding process? Or do you just need to buy new ones.

KLR

Generally, a rebuild solves all ills. If not, injector.com can sell you a new or used replacement and flow match it to the others.

Tom M'Guinn

The official Porsche injector kit comes with o-rings and caps. However, the caps are the taller yellow caps that apparently work on the n/a injectors. You may want to check with your supplier if they have the correct cap for the 951 injectors. Someone had sourced the right caps a while back, but I lost the link. I had one cracked hat like yours, and ran it for a while with no problems, including a trip to the smog test center.

Travis - sflraver

The ones we carry are universal. They work well for both the 944 and 951. I have never had luck with the bosh ones on the NA or Turbo... thats why we carry the ones we do.

Tom M'Guinn

Good to know. Not sure why Porsche sells a part that doesn't seem to fit.

theedge

Usually if the injectors are leaking, it IS the seals that are cracked.

I was quite happy with the place I went to to get mine cleaned at tested. Theyre all 99% of new IIRC. And they looked new when I got them back.

Gator_86_951

Yes. I ordered the bosch reseal kit and mine leaked like a siv. The Hats were wrong and so were the spacers. Ordered travis' kit and it is totally dry now. Big thanks to travis for preventing my car from catching on fire. Ball joint kit was sic too. Travis, I should tell you some of my cafe risque stories sometime. That place is hilarious. You can only imagine what the stores would be like going to Florida and being just up the road.

Pauerman

I was able to find a Bosch part number for the shorter (6.6mm) yellow pintle cap that should be used with our injectors - 1 280 423 731

This pintle cap is included in Bosch injector seal kit - 1 287 010 708. This is a kit for late 928 cars.

Marren sells the correct size 6.6mm cap in their seal kit

HTH

PorscheDoc

Are there internal seals then? I have replaced all the old rings and pintle caps, so i know those don't leak, but i think i am getting fuel leaking past the rings, which to me would indicate a leaking injector internally over time. I pulled the fuel rail, and turned on the fuel pump, and they did not leak at all, but i definetly have the smell of gas when i remove the oil cap.