Lift Pump leaking

OP, if you plan on keeping the MH I'd replace it. This problem started with ULSF as the gasket doesn't like it. A year ago I paid $225 from Cummins... The price is not going to get less.

hdeddie1 wrote:
Well after reading everyone's posts, I decided to pressure wash and clean the area and located the three bolts and the each took a half to three quarter turns. Did the trick. It is no longer leaking. How long that lasts is anybody's guess. I will keep a close eye on it. And in the event it doe's need to be changed, I've decided to do the job myself. I got lots of good advise on the forums. Thanks for all of your help. Ed.

It is prone to leakage in two place. The three bolts you tightened and the electrical entry area. I did what you have done to keep from being stranded and then had the pump replaced at my liesure in order to prevent another stranding situation.

hdeddie1 wrote:
Well after reading everyone's posts, I decided to pressure wash and clean the area and located the three bolts and the each took a half to three quarter turns. Did the trick. It is no longer leaking. How long that lasts is anybody's guess. I will keep a close eye on it. And in the event it doe's need to be changed, I've decided to do the job myself. I got lots of good advise on the forums. Thanks for all of your help. Ed.

It took Angela the better part of three hours to re and re ours when we had a clogged line problem. A few years later we had a leak but re-tightening solved the problem. We actually keep a spare now. They are not that expensive at a cummins shop. mid 300's or so.

Well after reading everyone's posts, I decided to pressure wash and clean the area and located the three bolts and the each took a half to three quarter turns. Did the trick. It is no longer leaking. How long that lasts is anybody's guess. I will keep a close eye on it. And in the event it doe's need to be changed, I've decided to do the job myself. I got lots of good advise on the forums. Thanks for all of your help. Ed.

Ivylog wrote:
Takes 3-5 hours. Do not bolt to engine until all five lines have started back. You cannot just replace the pump... The entire pump and mount has to be replaced. You cannot buy just a new gasket anymore.

Normally I would agree. However on mine, I couldn't get to all of the bracket mounting bolts once the fuel lines were installed onto the pump unit.

Ivylog wrote:
Takes 3-5 hours. Do not bolt to engine until all five lines have started back. You cannot just replace the pump... The entire pump and mount has to be replaced. You cannot buy just a new gasket anymore.

Right! You will be purchasing the entire pump assembly. From the price that you mentioned, that is what you will get. As Ivylog said, you MUST replace the entire pump/manifold assembly. What you are experiencing is typical for around that model year era for that engine.

I changed mine myself last year. Not all that bad of a job, depending on the particular coaches accessibility to that section of the engine. Mine was very easy to access from my bedroom floor via a large "L" shaped section that removes from the floor and the front underwall of my closet. With it opened, I can easily access the top 2/3's of my engine.

I did it over a couple of evenings after work, so I really can't say exactly how long it took. Plus, this was the first time I replaced one of those, so I was taking my time to get it right. I took a lot of photos with my camera phone before each step of dis-assembly so I would have a record of how everything was before I got my hands on it. The worst part of the job was moving all the rest of the "stuff" (i.e. cable and hose bundles)out of the way to get to the pump. Then, put it all back where it belonged when the job was done.

One "pain" was breaking the bolts loose that hold the pump bracket to the side of the engine. I recommend using PB Blaster or some other high quality penetrating oil on them before attempting to break them loose. The LAST thing that you want to happens is to snap off one of those mounting bolts. I drenched mine in PB Blaster for a good 20-30 minutes before putting a wrench to them, and they came right out.

TIP: With the new pump unit, you will see that the ports on the top (manifold) portion are all open. The various plugs and fittings will have to be removed and reused from the old pump. Just be sure to install them all in the same positions as were in the old pump. Ask Cummins for the o-rings for all of those fittings when you purchase the new lift pump. You should use new o-rings when reinstalling the fittings into the new unit.

Takes 3-5 hours. Do not bolt to engine until all five lines have started back. You cannot just replace the pump... The entire pump and mount has to be replaced. You cannot buy just a new gasket anymore.

hdeddie1 wrote:
I have a 2002 Safari Sahara with 350 Cummins ISC, and recently discovered that my lift pump is leaking at the gasket where it meets the engine block. Just a weep. But want to fix it before it gets worse. I've sourced the pump thru Cummins (337.45), but am wondering about the labor involved. I'm getting quotes all over the place. 2-5 hours, between 80.00 to 130.00 an hour. Not sure which way to go. Or who to trust. I' m in western Washington, soon to be heading to AZ. I go thru Coburg OR on my way. Anybody have any input either here or there or otherwise. Thanks. Ed M. 2002 Safari Sahara.

International truck, in south Mt.Vernon, Or Freight Linner just down the street.

you might try to tighten the bolts.

Oregon Motorcoach in the JC area or Brazels in WA