Fuel lines

[MountaineerTom]

Shouldn't both the inlet and outlet fuel lines, from the fuel filter, have o-rings on them?  I'm in the process of changing my fuel filter, and I noticed the outlet line (going to the engine, doesn't have one.  It's not stuf in the old filter either.  Hmm.  Guess I'll head out to Advance and see if they have any.  

[GreenRado]

Got me on that one, Tom - changed mine some months ago and never noticed.  

 

Doesn't leak though.  

 

You say the inlet side of you old filter had one?  Was it rubber-like or metal, like a compression fitting?  Suddenly racking my brain and can't remember how all the connections were.

[RyanbabZ71]

Same here changed mine in july and didnt notice.  However i dont think they had any o rings but that is just speculation

[MountaineerTom]

Yeah, this is the second time I've changed it, and I didn't notice the first time either.  LOL  It's never leaked, and still doesn't, so I guess it's ok.  If it's suppose to have one, I can easily put it on, just got to find out if it's suppose to.  Daryl, yes, the inlet side did have a rubber looking o-ring.

 

A friend of mine that works at an auto parts store, said he doesn't think it's suppose to have one, but not sure.  He said he's got plenty of 0-rings if I need to put one on though.

 

Anyone have access to a factory manual that can confirm weather or not both lines are suppose to have an 0-ring?

 

CMNTMXR81??

[CMNTMXR81]

Nope, no O-rings.  The inlet side to the filter is sealed by the flared end of the fuel line and where it seats on the filter itself.  When tightened, the threads on the filter and the bolt on the fuel line clamp it all down.

 

On the outlet side, the plastice squeeze clamp on the filter and plastic connector on the fuel line seal it up.  There may be a rubber o-ring in the plastic connector on the fuel line, but probably not replaceable without replacing the entire connector.

 

Unless you have a leak, there shouldn't be a need for O-rings as the fuel system isn't a high pressure line that expands joints due to the pressure.  Most fuel lines only run between 10-15psi.

[MountaineerTom]

Thanks CMNTMXR81, but mine has no plastic clips fot the lines.  It's the kind that the ends of the fuel lines screw into the filter on each end.

 

Here's a pic after the filter was removed.  You can see the reddish/brown o-ring on the inlet line (left) and no o-ring on the outlet line.   ???

[carguru]

I never remembered seeing any o rings in there before.   ???   If you do replace the o ring, make sure it is a nitrile type.  Standard rubber o rings will deteriorate in the presence of gasoline.  Nitrile doesn't.

[CMNTMXR81]

I have a feeling that flange on the outlet side when put under pressure with the bolt seals it.  Like previously stated, this isn't a high pressure line, so there shouldn't be much worry.

 

However, for cheap insurance you could always add an o-ring (nitrile like Car said).

 

:thumb:

[MountaineerTom]

I never remembered seeing any o rings in there before.   ???   If you do replace the o ring, make sure it is a nitrile type.  Standard rubber o rings will deteriorate in the presence of gasoline.  Nitrile doesn't.

Thanks.  Yeah, I knew it wasn't regular rubber, but didn't know what it was actually called.  

 

When you look at the outlet line up close, it looks like it has a small indention for an o-ring to sit in, only it's not there.  

 

I don't see what it would hurt having one on there.  But it's never leaked, so...

[MountaineerTom]

I have a feeling that flange on the outlet side when put under pressure with the bolt seals it.  Like previously stated, this isn't a high pressure line, so there shouldn't be much worry.

 

However, for cheap insurance you could always add an o-ring (nitrile like Car said).

 

:thumb:

Thanks CMNTMXR81.   :thumb:

[CMNTMXR81]

No problem.  But even if it were leaking that would be good too...getting high off the fumes isn't wrong you know.