Hey gang, hoping someone might have a good suggestion on pulling the fuel injectors out of the intake manifold. I'm in the process of replacing my upper intake and fuel manifold gaskets on my '97 4.0 and I want to pull the injectors and replace the o-rings while I'm at it. I have removed the intake plenum and fuel rail.

Anyway, I can't seem to get them out. They twist and spin easy enough in the holes but I'm afraid to pull/yank/pry too hard and break something.

Any tips on getting them out without breaking something?

Thanks for any help.

 

Some silicone spray. It just dirt and grim holding the o rings in the manifold.

 

No luck. It seems like the o-ring has hardened and is stuck to the mating surface in the intake. I can spin the injector, but it acts like it's spinning inside the o-ring and the o-ring is not turning. I've got 150k miles on it and they have never been out.

Is it safe to try some PB Blaster or something that may penetrate the o-ring seal?

Thanks

 

I sprayed a little WD-40 on them and that did the trick.