MARF75

First off, the search isn`t working. I finally had my truck running for a decent length of time(idleing in the driveway). There`s fuel dripping off the bottom of the filter (FS1221) and down almost the whole driver side of the block

The trucks probably been running a total of 20 minutes since I changed the filter, 15 minutes of that was today and the other times were 2 or 3 minutes at a time.I know I`ve read before about leaking o-rings and also something about the fuel heater (possibly deleting it).

Can somebody please fill me in on where to look for this and how to remedy it? I am not familiar with the heater. Or could it be something else?

maybe368

There is an o-ring for the fuel heater above the filter that is known to leak. It leaked on mine. It's an easy fix...Mark

MARF75

You mean between the heater and the block?

maybe368

Yup...Mark

BearKiller

Fixing the O-ring is easy.

Getting the filter stud out is not.

Finding the right O-ring is not easy either.

Best is to get a heater delete stud and eliminate the problem forever.

jimbo486

The "o-ring" used between the head and fuel heater is actually a rectangular ring seal, according to Cummins.

Call your local Cummins and give them your ESN (engine serial number) and tell them what you need.

I don't have a P/N for it but if it'll help them find it, it is under Option FF9018, Group 06.04, Graphic ff900gp, Ref. No. 7 in the following diagram which the parts guy/gal should be able to find.

Brian.B

the o ring wasnt to hard to find ,,but the dodge dealer here could only get a pack of 30 and he said i was the first person to ever ask for one in the whole 15 years he worked there,,so he checked around and found me one 50 miles away for 3 dallors,,,the pain in the a$$ was getting the stud out,the sticky said you could use the dodge spare key but that wasnt happening so after i sat there thinking for an hour watching bthe sun go down i figured it out,,,i took a 13/16 plug socket and a small piece of flat metal as thick as a key about as tall as a hack saw blade and cut it so it would fit in the furthest points in the six point socket then just tapped it down in there and its centered,,,it works perfct,,,ill try and take a pic and put it up.....good luck and just remind yourself how much you like this truck if it starts getting aggravating......

MARF75

Does the heater loosen up when you take off the old filter?
I'll check the sticky for changing the oring but,does the stud hold the heater on the head?

Onemoparnut

Yes the stud holds the heater on.

1992gen1_fan

Yes, the stud holds the heater to the head. If the stud is not tight enough, the heater can loosen up when the fuel filter is removed. Its not supposed to. If you remove the filter, you can loosen or tighten the stud with a piece of flat steel, a wide screw driver, or like I do with a 12gauge shot gun choke remover tool that I made to fit.

squarenose

I fixed mine by cutting out a piece of fuel gasket and putting it on top of the old ring. Have had it in there about 2 years has not leaked since

BearKiller

I don't doubt for a second what he said; but, of the many 1st Gen. trucks and engines we have here, not a single one hasn't had an issue with the heater leaking.

I can't remember exactly where, Sheids maybe, or possibly Geno's, I bought a pack of a dozen seals in a little Cummins plastic bag.


Then, I found out I could buy a different filter stud and eliminate the heater completely, so that is the route I have went on some of our stuff.


One big improvement of the heater-delete stud is that it's center-bore is HEX-shaped and accomodates a plain old Allen-wrench.

Twitchy

BearKiller,

Where did you find the heater delete stud?

Thanks in advance,

Ryan

maybe368

When I did mine, which was long before I ever found this site, I had absolutely no problem removing that stud. Problem is that it has been so long ago. I don't remember how I did it. Probably it was a result of only 1 prior owner and the truck has never lived anywhere but AZ, where things don't corrode or rust...Mark

jimbo486

Both Cummins and Case/IHC have them. Cummins P/N: 3925945, Case/ICH: 925954.