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Grease for injector seals? #3488824 09/20/14 08:04 PM
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Spetz Offline OP
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What grease should I use on injector O-rings?

And, should this be done on both the bottom and top O-rings?


2003 Mitsubishi Diamante 6G74. 165k miles.
Penrite HPR10 10W50, 12K km OCI
UOA:
https://www.bobistheoilguy.com/foru...ante-shu-5w40-1-2-can-mos2-7-8k-mile-oci
Re: Grease for injector seals? [Re: Spetz] #3488829 09/20/14 08:07 PM
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Posts: 13,688
bdcardinal Online Content
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For a regular MPI injector, Vaseline works great. Use on both the top and bottom.


2014 Ford Mustang GT Track Pack
1995 Ford Mustang GT

Ford/Mazda Parts Counter
NRA Benefactor Member
Opinions expressed are my own.
Re: Grease for injector seals? [Re: Spetz] #3488831 09/20/14 08:09 PM
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Oil Changer Offline
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Dielectric.

Re: Grease for injector seals? [Re: Spetz] #3488834 09/20/14 08:14 PM
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andyd Offline
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Bentley for E28 BMWs advises gear oil. Regular oil doesn't work as well. I know, I tried. never thought of vaseline or silicone.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Grease for injector seals? [Re: Spetz] #3488835 09/20/14 08:14 PM
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Spetz Offline OP
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Won't vaseline deteriorate the rubber as it is a petroleum grease?


2003 Mitsubishi Diamante 6G74. 165k miles.
Penrite HPR10 10W50, 12K km OCI
UOA:
https://www.bobistheoilguy.com/foru...ante-shu-5w40-1-2-can-mos2-7-8k-mile-oci
Re: Grease for injector seals? [Re: Spetz] #3488836 09/20/14 08:15 PM
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Bud_One Offline
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white lithium grease


16 Civic- PUP 5W-30, XG7317
14 Civic- PP 0W-20, XG7317
05 Chevy 2500HD- QSUD 10W-30, PF61E
97 Accord Wagon- Napa Performance 5W-30, Napa 21334
Re: Grease for injector seals? [Re: Spetz] #3488840 09/20/14 08:24 PM
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demarpaint Offline
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Super Lube grease is what Trav suggested I use when I installed my injectors. It worked fine.


God Bless Our Troops

Re: Grease for injector seals? [Re: Spetz] #3488843 09/20/14 08:31 PM
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michaelluscher Offline
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I use a very liberal amount of silicone dielectric


2006 Toyota Camry SE V6

131k
Re: Grease for injector seals? [Re: Spetz] #3488857 09/20/14 08:54 PM
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Bluestream Offline
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STP oil treatment is what local injector shop uses.


2000 VW Beetle 1.8T M5
2006 Pathfinder 4X4
1991 BMW 735iL
"A fool and his money are soon parted" - Thomas Tusser
Re: Grease for injector seals? [Re: Spetz] #3488871 09/20/14 09:16 PM
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Chris142 Online Content
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Originally Posted By: Spetz
Won't vaseline deteriorate the rubber as it is a petroleum grease?
they seal a petroleum gasoline.oil or Vaseline wont hurt em.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Grease for injector seals? [Re: Spetz] #3488879 09/20/14 09:25 PM
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crazyoildude Offline
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We use regular STP or any other oil thickener


Check To See That The Oil Jugs You Buy Have The Exact Amount Of Oil In Them And Have An Inner Seal Under The Cap. I Use Mobil 1 And Fram Ultra Filters
Re: Grease for injector seals? [Re: Spetz] #3488927 09/20/14 10:34 PM
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joegreen Offline
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most dielectric grease is 100% silicone. you should use 100% silicone grease.


1978 Chevrolet k20
Engine: Delo 10w30xle
Transmission: Castrol transmax dex/merc

1984 Mercedes-Benz 300 turbo diesel
Engine: Delo 400 15w40le
Re: Grease for injector seals? [Re: bdcardinal] #3488935 09/20/14 10:48 PM
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ls1mike Offline
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Originally Posted By: bdcardinal
For a regular MPI injector, Vaseline works great. Use on both the top and bottom.

That is what I use for all my O-rings. Works great!


Mike
00 Trans Am WS6 5.7 LS1
17 Silverado 3500HD 6.0
14 Caprice PPV 6.0
15 Malibu LTZ Turbo
12 Passport TT
Re: Grease for injector seals? [Re: Spetz] #3488950 09/20/14 11:11 PM
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Quest Offline
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I've been using vaseline on injector O-rings and also the ones that goes into the fuel rail.

Do not use silicone grease of any sort. If it gets into the fuel rail (which it will, trust me on that), will subsequently gets into the emissions control components (upstream O2 sensor, CAT, etc.) and will ruin them over time.

Also: these o-rings (seals) are made of viton, and 100% resistant to mineral oil products.

Q.


"Internet discussion boards act as echo chambers for conspiracy dittoheads" A.Allen
Re: Grease for injector seals? [Re: Quest] #3488977 09/21/14 12:35 AM
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michaelluscher Offline
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Originally Posted By: Quest
Do not use silicone grease of any sort. If it gets into the fuel rail (which it will, trust me on that)


Yes and no.
I am fully aware of silicones nasty habit of poisoning Oxygen sensors, but you're not globbing it on, your putting a extremely thin film on, not enough to see, or wipe off. I've done it on some part into plenum o-rings that refused to go in, and injector o-rings, to no ill effect of oxygen sensors.


2006 Toyota Camry SE V6

131k
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