injector 0-ring lube

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Nov 16, 2010 | 09:53 PM

bigbird

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Newbie

Joined: Jul 2009

Posts: 29

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Model: Cherokee

injector 0-ring lube

getting ready to replace the o-ring on the fuel injector and fuel pressure regulator. i hear to use lube to install but what kind of lube? thanks for the help

Nov 16, 2010 | 10:00 PM

Aldakoopa

Seasoned Member

Joined: Oct 2010

Posts: 272

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From: East Lake, NC

Year: 1987

Model: Cherokee

Engine: 4.0

I used a little bit of motor oil when I did it to my old Jeep.

Nov 16, 2010 | 10:12 PM

ZachsXJ

CF Veteran

Joined: Sep 2009

Posts: 4,145

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I've always heard people say that petroleum jelly is the best thing to use.

Nov 16, 2010 | 10:15 PM

1991Jeep_Man

CF Veteran

Joined: Oct 2009

Posts: 2,867

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From: Fauquier County, Virginia

Year: 1991

Model: Cherokee

Engine: I-6 4.0 HO

I just used some left-over 5W-20 motor oil from when I did a change on my dad's focus. Worked just great, no issues. Basically anything that lubes it up should work.

Nov 16, 2010 | 11:01 PM

jeff2285

Seasoned Member

Joined: Jun 2010

Posts: 275

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From: Ontario Canada

Year: 1998

Model: Cherokee

Engine: 4.0

according to the textbook Automotive Technology: A System Approach: First Canadian Edition it is best to use motor oil
just did a chapter on fuel system diagnosis and repair and this was one of the questions
12. What should be used on the injector sealing O-ring when installing an injector?
A) silicone grease
B) silicone sealant
C) engine oil
D) gasket cement

Last edited by jeff2285; Nov 16, 2010 at 11:03 PM.