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Re: Fuel Injector O Rings
I just had the fuel injector O rings replaced in November. I watched
as the Audi mechanic replaced them (incidentally he's a friend and
actually enjoys showing me how to work on the car - can't say the
service managers are as friendly). He used an 18" (or so) pry bar
with two prongs to pull the injectors out. It looks like a long screw
driver with two prongs at the end, bent at about 70 degrees to the
shaft, the prongs fit around and grip the injectors. In the past I've
borrowed the injector puller tool "thingy" - which is a short piece of
metal that grips the injector and has slots for a screw driver to
lever out the injectors. This latter method works, but not as well as
the pry bar.
Once the injectors are out inspect the O rings for cracks, distortion
and general aging. The old ones should pull off fairly easily, if they
are hard, just cut them off. A neat trick for installing the new
injectors is to obtain a piece of pipe just wider than the injector.
Lube the pipe, the O rings and injectors with WD40, then force the O
ring on to the end of the piece of pipe, then put the injector inside
the pipe and push the O ring off the piece of pipe on to the injector
seat. This makes it much easier than rolling/pushing the O ring up the
length of the injector.
It would probably take me about 30 minutes to an hour to do, my
mechanic did it in literally 5 minutes - I was impressed, How does the
saying go "give me the tools...."
.... and I'll break something really expensive!"