Truck started to start real hard yesterday and by the time I've done all my Christmas running it now has a good size leak up near the injector pump.  If i let it run for about 5 minutes it has a pretty good size spot on the ground.  I can't really see any wet fuel lines but it's definitely dropping down on the front diff. Could my injector pump itself be leaking? It does have an airdog pump on it but like I said I don't see any fuel on the lines. 

 

Got any suggestions? 

98.5 24v if that helps any. 

Edited December 26, 20159 yr by Millfire517

Do you still have the factory fuel filter housing? Those have been known to leak from a few different spots. 

Yes I do. I'll look to see if it's still connected in the morning. I thought it was unhooked but I could be wrong. 

Check your fuel filter drain valve. They are known to leak. It might be the o-rings are worn out too. Some people have been known to take them apart and reseal them. Depends on the version of valve.

Yes I do. I'll look to see if it's still connected in the morning. I thought it was unhooked but I could be wrong. 

 

Ok. The fuel filter housing is unhooked and I found a metal line that it was dripping from. I included it in a picture. It's the banjo fitting on the left next to my fuel line. 

 

Does that thing use copper washers? If so where do I get them from?  And what size it that fitting?

It's a 14mm rubber coated washer. I've used copper washers as a temporary fix to get me home but they didn't seal up completely. Google something like "cummins banjo washers" you'll get a better idea of what I'm talking about. 

Also the fuel return banjo bolt on the back of the head takes a 12mm washer so you should get a few of those while your at it, I'm sure you'll need them eventually. 

I've seen 12mm and 14mm, I'm all confused now, lol

 

I think it's called the over flow valve/banjo fitting. 

Edited December 26, 20159 yr by Millfire517

1 hour ago, Millfire517 said:

I've seen 12mm and 14mm, I'm all confused now, lol

 

I think it's called the over flow valve/banjo fitting. 

Correct the one you're pointing to is the overflow banjo fitting. This is where excess fuel returns back to the tank. It takes two 14mm rubberized washers. 

Edited December 26, 20159 yr by Buzzinhalfdozen

What size wrench will I need? All I have is 3/4 and it was too small. I also tried an 18mm but it was too small too 

Edited December 26, 20159 yr by Millfire517

I just put a 3/4 on mine and it was a hair big. Most likely metric.

19 mm=3/4 in

Not sure what size it is though if you look for one specifically for it get a tubing wrench likely a metric beings cummins uses metric everywhere.

Figured I'd ask before I bought them, but my buddy says his store sells rubber over metal drain plug washers that are in 14mm. Wood those work till the ones I ordered come in? 

It's worth a shot the worst that can happen is it will leak. 

Come to find out it's actually the metal line that is leaking. I'm over this truck. Just going to sell it as it is

What you want for it?

I'll sell it for 12k with the brand new western plow on it

I just got done doing an inspection of my truck and come to find out I had a small fuel leak. So I power washed the engine bay clean since there was fuel everywhere. Now let it dry over night. Now fired up this morning and watch things closely with a flashlight. What I found was in the 3,5,6 group of lines on the block side one of them was leaking. So using 3 different wrenches with all different pitch angles of the open end I tighten the one line problem solved.

@Millfire517 Sure would be a shame to sell a good truck over a minor fuel leak. I could most likely fix that with a soldering iron or a propane torch and solder. It's a shame to give up so quick. If I had the money I would buy your truck.

Yes listen to Michael. I've been driving my truck for 20 yrs come this October with minor problems just like yours off and on throughout it's use. Stay away from dealers is the main thing and you begin to get some smarts on simple repairs and fixes. My old 1st gen has saved me at least $100,000 Bucks not buying other trucks to replace it.

If you stick with it.... it will give you back with an unbelievable experience of long term trouble free use.

Trust me, I love my truck but it's coat me several grand the last couple years on a bunch of crap. Seems like I get it running god again and something else pops up. 

It is an old truck.  A good old truck, but it is an old truck.  No getting around that.  It will take maintenance and some patience to run old equipment. 

1 hour ago, Millfire517 said:

Trust me, I love my truck but it's coat me several grand the last couple years on a bunch of crap. Seems like I get it running god again and something else pops up. 

How many miles are on it?

I know a guy that bought a brand new truck that is having worse problems.

BTW, I spent 4 grand after buying my other 2nd gen truck only 30,000 miles with no problems I invested in it's my future making it bullet proof. Still way less than a new truck and better still.