Injector installation technique

[timatt]

I'm putting this in a separate post to raise visibility in hopes of getting an answer before this evening when I can work on my Q.

What is the correct for installing injectors into the fuel rail???? I want to prevent pinching or otherwise damaging the O-rings. I know to lubricate it. Last time I used a silicone spray. Do I twist as I push them into the fuel rail or should I go straight in????

GURUS; Please advise

[elwesso]

If you twist, then it could pinch the O-ring..... Im fairly certain you ALWAYS want to push straight down..

[911/Q45]

Vaseline as lube has worked great for me.

[Chally]

Any grease should work OK. To make it easier, put a film of grease on the Rail as well as the O ring. The parts only need to be slippery & not covered in heaps of grease.NB It will still seal perfectly with the grease on it.

[timatt]

I removed the injectors on Friday night and found out that I damaged three of the lower O-rings damaged when I installed them last weekend. I replaced the damaged O-rings with new ones and installed them lubricated with sil-glyde. They went in easily, and now the car starts and runs properly and maintains fuel pressure when the engine is off. I learned the following from this experience.

1. Use a heavy grease type lubricant on the injector O-rings. The first time I installed them, I used a spray type silicone lube and the injectors were much harder to push into place. With the sil-glyde silicone grease, the injectors snapped into place quite easily.

2. I don't believe that it makes a difference whether you push the injector straight into its seat or whether you twist while you are pushing the injector in, PROVIDED THAT YOU USE A GREASE TYPE LUBRICANT ON THE O-RINGS.

[elwesso]

Glad ot hear your already GORGEOUS Q is running even better.....