I'm wanting to replace the injector seals on my 84 245 turbo w/IC. It's the kjet CI system. Bentley says to disconnect the fuel lines from the injectors before removing the retainers/injectors. The only thing I see to do is to loosen the nut at the end of each fuel line but when I try that I just end up twitsting the metal line fuel as well as the nut (which can't be good). What am I missing? Also, do I need to relieve fuel line pressure before disconnecting the lines at the injectors?
Thanks in advance!
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1966 122s + 1984 245ti = much to learn!

If I recall right you don't need to disconnect the fuel lines to change the seals on a turbo. Take out the allen bolts and pull the injector up with the line attached. That way you don't risk damaging the lines or getting dirt in the injectors.
Also the nut on the attached fuel line is usefull for prying off the plastic intector retainers. You can wedge a flathead screwdriver in between and wiggle the retainer off. Without the nut there is nothing to pry against.

You're correct, don't disconnect the injectors. Very easy to replace the seals. Even easier to check if they are leaking by pouring some water over the injector while the engine is running. Revs chance means seal is leaking.

The way it should work is you take a wrench, I prefer a crow foot wrench, and turn the nut to the left and it loosens right up. The gold colored metal piece ontop of it is supposed to anchor the injector and keep it from spinning when you tighten it or loosen it. With time and multiple times in and out the little retainers tend to loose their ability to do so. What has worked for me in the past has been to jam a little slot head screwdriver in through the openings in the retainer piece. Get it in their so it indexes on one of the flats for the injector and then pop the nut loose. Once you have the line off completely remove the socket head screw that is holding the retainer to the head and then pull out the injector and injector cup assembly. I use a set of long needle nose pliers that are round on the end for grabbing hoses. They will offer some resistance but you should be able to pull them out without too much trouble. With them out take the retainer off and bend the little ears over so it will hold your injector as it should. I always use a little silicone lubricant around the seals both big and small and I have a special brush that is made for cleaning the holes in the head that it all mounts in. Clean these holes really well regardless of what you use and be careful because it is more or less an open hole to your cylinder. If you drop anything small down that hole it will not be a pretty sight.


Mark

Thanks for the reply. I think it must be the case, as you suggest, that the retainer is not holding as it should 'cause the nuts are simply. I'm curious though, why not do as "hodgeas" posted and simply leave the injector attached to the fuel line? Is there some danger in doing that that is not readily apparent? Thanks for the help! Corey
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1966 122s + 1984 245ti = much to learn!

Well he is dealing with a '79 240, a non-turbo car. That is an entirely different beast, he has hard plastic lines and you have the steel lines. The plastic lines are free to move around quite a bit and the steel ones are not only steel but they are mounted in those little blocks. I have never tried doing it that way because every other Volvo tech that I have worked with has done it the way I laid out and part of servicing the injectors on those old cars was to put them on the injector cleaner and clean them out. On a normally aspirated car you take them out just as he says. Pull the bolt, pull the injector with the cup and then unscrew the injector from the line. In fact if you are not going to clean the injectors then it is completely uneccesary to remove them from the line. You could probably get away with pulling them with the steel lines still attached but it is going to be a little hard on them. Otherwise you would remove them and just push it aside and pull the injector and cup out and service them.

Mark

I think I see what you're saying. I'll try the trick you suggested above using the flathead screwdriver to hold the injector in place while removing the fuel line. If I can't get that to work then I'll try the other way. Thanks a lot for taking the time to respond in depth! Corey
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1966 122s + 1984 245ti = much to learn!

Corey, no problem whatsoever. You have already noticed that when the injector does not remain stationary that the line spins with it and have figured out that this indeed cannot be a good thing. Pay close attention to that because if you turn one of those thin little steel lines into a barber pole you are going to wish you were double jointed so you could kick yourself in the ass. Good luck and keep us posted.

mark

I'm by no means an expert, but I didn't have to disconnect the injectors on my k-jet ('79 242) when I changed my injector seals a couple weeks ago. Just remove the retainer bolt and pull the injector out carefully the skinny seal goes on the plastic retainer piece and the fat seal goes on the injector itself. If you dip the seal in a little gas first it will all slide together a lot easier.