removing 73.5 T CIS Fuel Injector Seals

[Seneca911T]

Team, I cannot seem to find this specific challenge on the Forum. In removing 1973.5 T with CIS injectors to inspect clean and test, I noted the injectors were very loose, moving up and down perhaps 3mm. I removed the injectors using a "Chuckster tool" that was painless and avoided damage to the sheet metal rim of injector holes.

However, I now want to remove and replace the rubber seals themselves. This is proving beyond my imagination of how to remove without risking damage to the sheet metal surrounds, or dropping something (rubber bits) directly into the intake valve area on top of cylinders. The seals - (our host provides https://www.pelicanparts.com/More_Info/91111092200.htm?pn=911-110-922-00-OEM) appear to be one piece but with 2 different diameters.


I have tried pulling out with right angle pick, and separately, using a coarse 3/8" lag screw with a lever tool and wood block. I have stopped short of cutting with razor blade for fear of dropping a cut piece into intake valve

Any tricks or advice would be appreciated!

[gazzerr]

The best and safest way is to remove the runners from the intakes and tap them out from the underside with a thin socket if they are like the phenolic liners on an 80 -> 83. On a 73.5T hopefully it's a lot easier than an 80's G body without all the extra CIS emissions vacuum pods. You might be able to get away with not even a partial drop.

[gled49]

The 73 injectors are in the heads not the runners. U might have to risk a little rubber in the ports. Maybe exacto blade cutting out the rubber.

[Seneca911T]

Thanks for suggestions, I will obtain a couple new exacto blades and let you know if surgical extraction works!

[Seneca911T]

Hi, I attempted to remove the rubber injector seal on Cyl #4 with exacto knife and narrow blade. The blade ran into metal about 8-9 mm below top of seal . I removed about 30 degrees of the top - larger diameter seal to discover that the sheet metal holder for the injector (and seal) actually narrows at that 8-9 mm below the top. so would probably hold the injector seal in place. makes sense, but then if I cut the rubber off above that sheet metal ring, the narrower diameter at bottom of seal will fall into intake valve area - not good!

I also noticed that with a section gone, that the sheet metal injector support of about 22mm diameter appears to have a lip of perhaps 0.5 mm on inside diameter, that could be what is blocking removal of the seal, although I also suspect that the smaller diameter part of the seal is also larger than that diameter of sheet metal that is below the top part of seal.

I suppose I will get a new seal, and do investigative destruction to determine what exactly I am facing to remove these seals.