Hello everyone, looking for a little advice. I successfully removed my injectors and cleaned and tested each one. I'm trying to reinstall and I am having a really hard time getting them back in the fuel rail. Any suggestions would be welcome.
Add a light coat of oil/grease on the o rings. If they are new they will take a bit of hard pushing to get them in the rail, at least it was like this on my M30. They went easily in the intake manifold though.
90,700 miles 1992 BMW 735iL Azure Blue Metallic with Silver Grey leather interior ‣My car ‣My YouTube channel
A little wd 40 on each o-ring.
Rob E3
+3...a little engine oil, WD40, grease, assembly lube or even a dab of silicone lube. Those o-rings are mildly oversize to ensure no leaks and will easily catch on the lip of the injector if they're not seated squarely in the bore. Some replacement o-rings I've used on other makes seemed to come in different sizes depending on the fuel rail, but that's not the case with our cars as far as I've seen. I usually give injectors a little wiggle & twist when I install them. It really helps to center that o-ring in the bore before pushing them home.
Be aware that many shops have replaced the older Nitrile/Buna-n rubber with Viton. Viton is far more alcohol resistant but less pliable, I've struggled with them a bit.
Ignore any temptations to use a rubber mallet...
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'08 128i 6MT, '86 635CSi 5MT (B32, Motronic 1.3, WBO2, G265, 18# FW, 3.46 torsen)
Past projects:
'96 318iS, sold 4/23 '90 535iM, RIP 1/23 '90 535iA RIP 6/22 '91 318i, sold 7/19 '97 M3 sedan, sold 11/18 '85 735i, RIP 2/18 '92 325iC, sold 7/16 '91 318iS, sold 6/16 '84 745i, sold 10/14 '82 633CSi, traded 9/12 '90 325i, RIP '87 325 sold '89 525i, traded '87 325iS, RIP
Thanks for the suggestions, this made it much easier!
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