Nick & Kels 08

The other day i drove from Northeast Texas to the Panhandle. I stopped after about 400 miles to top off on fuel(still had a quarter of a tank). I filled up and the truck wouldn't start. Finally went and purchased starting fluid and after a little squirt she fired right up. Upon closer examination i noticed fuel coming from either the water drain on the filter or from the top of the filter somewhere. Ive read somewhere that it may be air in the fuel lines. My ignition swith also was acting all retarded so i went and got a new one. What does it sound like the problem is to you guys?

Crossy's son

Sounds like you're getting air in the system through that leak. Which could be the water seperator

And what do you mean your ignition switch was goofing? Like it wouldn't shut the truck off or it wouldnt' turn in the column? haha.

JD730

Considering the age, if it leaking by the fuel filter its more than likely the fuel heater o-ring right above the fuel filter.

Nick & Kels 08

my ignition switch will turn back way farther than it should. when i turn it to start it starts up and i had to wiggle it to make the windows and radio work. Is there a sticky on the fuel heater o-ring or can you explain how i change it out and where to get the part from? Is it a dealer only item or will any parts store have it.

JD730

Check the fuel filter and make sure you confirm the location of the leak.

I don't believe there is a sticky about the fuel heater o-ring, a search may yield more information. I don't think the parts stores can get that o-ring, cummins dealer is the best bet, just have the engine serial number handy when you call for parts.

The hardest part of the whole thing is getting the stud out that hold the fuel heater on. Its a flat head screw driver, but I had to grind a special 3/8" drive one I had thinner so it would fit the slot.

YOUNG GUNS15

An O-ring is an O-ring, run to your napa store and take a gander at their O-ring sets.

No need to deal with the pricey cummins dealers!!

unixcowboy

Just make sure the new o-ring is square cut like the original - DO NOT use a round one 'cause it'll leak.

Nick & Kels 08

Thanks for the help, ill confirm and keep yall updated. Thanks Again

BC847

That is a square-cut O-ring as unixcowboy has pointed out.

It's been my experience that the local parts houses don't have it.

Nick & Kels 08

Thanks bc847 thats what i was looking for. Appreciate it

92smokin blacky

the fuel heater just unscrews like the fuel filter right? or is it reverse threads or anything? just unplug it first. dang maybe i need to check mine.

G1625S

Had the same issue on my 89. I took a used gasket from a grand cherokee oil filter and trimmed it to fit. It sealed up nice. It was Sunday and I was in a pinch.

JD730

Yes, normal right hand threads.

Subliminal

I'm pretty sure my fuel filter came with a new gasket...maybe just get a new fuel filter.