pump rebuild/ replacement

[McGivern]

Hello Guys,

I blew a seal in my injection pump this morning and it's bleeding like a stuffed pig. I need to have it rebuilt or buy another rebuilt pump. I looking for input from anyone who has had to rebuild or replace thier VE pump.



Thanks

Mark



92 W250 Crew Cab Getrag 16cm 3" Exh

 

[Power Wagon]

You didn't say where it was leaking... BUT, since you can see it, I'm going to assume it's leaking OUTSIDE the engine, right?



There is one very likely situation that's caused the leak. It's that the advance plug has come loose. It is sealed with a special o-ring, but every so often, it comes loose. It is on the backside of the pump, next to the block, and at the very bottom. fuel tends to run off the bottom edge of the pump, which is the side closer to you... don't let it fool you.



Now, the pump does have to be removed, but the "fix" should cost no more than roughly $50, excluding labor to R&R the pump itself.



For that money, you should get a new o-ring, the end plug (really, a flat plate) put back on and the screws that hold it locktited and torqued in place, the timing set to stock or your specification (geez, why go stock... ask them for 1. 35 to 1. 4). Removing and replacing the pump is normally about 3-4 hours flat rate time.



So, it's probably not as bad as you may have thought



Other places to leak, are the throttle shaft in the top cover. It's more expensive to fix, but you're still looking at only about $300 excluding R&R the pump on the truck, and that should get it run on the test bench and tweaked to best part of the specs.



OOOPS, almost forgot. Go to your yellow pages and find the diesel injection shop that's Bosch authorized in your area. There should be at least one, maybe more. Ask if they do vehicle work. If they don't... well, yer on your own. Cummins itself can do the job, but that would not be my first choice. First choice would be some place that's totally familiar with performance mods to the Cummins.

 

[paccool]

Mine blew last year. When it went, looked like I had a drum of fuel in the truck with the valve open. There was a trail of fuel in the road behind me. The pump was "leaking" at about the spot Power Wagon said, but it was a stream about the size of your little finger coming out of the back of the pump and spraying all over the place.



Ended up having the pump rebuilt and then tweaked and Dyno tuned. Still didn't run as good as it should so had Wentland Diesel pull it out a couple of months later and set it up properly. The pump timing was way off from the shop that did the first install and the pin was also off top dead center about 2. 5 degrees



The whole thing ended up costing about $2000 but it runs pretty good now.

 

[McGivern]

Thanks to you both,

I plan to pull the pump on Saturday and take it to one of the Bosch dealers here in Phoenix. I think I'll let them pop test the injectors as well. I'm still running stick injectors, so they may need to be replaced. The best deal I've found so far is $375 for BD performance injectors at Diesel Injection Service. What are your thoughts on injectors?

Mark

 

[Power Wagon]

How much extra power do you wanna make?



PW injectors give you about 30 HP. The lucas injectors from the guys north of the border get you somewhere around 50 HP.



On an otherwise untouched truck (except timing), the PW injectors do not smoke significantly (faint haze), the Lucas ones will.



I believe you can get the new Bosch injectors (PW hosers) from Wentland Diesel Service (www.wentlanddiesel.com) for less than the figure you mentioned... but you'll be in line behind me when they arrive (backordered at present ETA last of Jan... )



Please note, although I used to work there, I get no commission, nor have I been paid to promote anything... It's just the place I know best.

 

[paccool]

Good disclaimer Mark!!



Was wondering about the horsepower difference between the PW and the other injectors. My truck is smoking pretty good with the PW's, sure don't need more! That is the star wheel adjustment I mentioned in the E-mail that I need you to show me.

 

[backroad]

Mark McGivern- Please contact me with your contact information. I've tried to reply to your e-mails but get a postmaster nondeliverable mail message.



Sorry, but i've tried several times and methods since our first contact.



Thanks,

Dennis in Dewey.....



AND GUYS, sorry about cluttering the thread.....

 

[BushWakr - RIP]

Pump Pic...

Does this help ?

 

[Evan A. Beck]

Originally posted by Power Wagon

... There is one very likely situation that's caused the leak. It's that the advance plug has come loose. It is sealed with a special o-ring, but every so often, it comes loose.

Seen this one happen a few times... It is caused by one of two things, typically: 1. Small air bubble getting trapped in the bottom of the pump. 2. KSB solenoid staying on all the time, due to a bad pressure switch.



Be sure to check the operation of the KSB after you get the pump fixed. On a cold start, you should see 12V at the KSB solenoid, and it will be turned off after the engine has warmed up a little. It should NOT be on when the engine is at normal operating temperature. If your engine is a CPL 1533 (if I am not mistaken) the KSB will operate on 10V, and there is a resistor in the wire to the solenoid.

 

[McGivern]

Hey Guys,

Pump is back. The verdict was the seal around the throttle shaft. There was an update from the original copper bushing to a steel bushing. The total damage for a complete rebuild was $475 including an installation kit. They also set my timing to 1. 45 and turned my governor up a tad. Finally, they offered to adjust the pump after I reinstall it and the new injectors for a mininal cost. I was very impressed with the price at this Bosch factory auth shop! The guys are nice and know what they are doing. I had been quoted upto over $1000 for a rebuild. If anyone is interested in a reference, please email me at -- email address removed -- .



I can't wait to get back on the road!!!



Mark

 

[paccool]

Sounds like you have found yourself a good shop! Is getting hard to do that these days.



Stan

 

[McGivern]

OK guys,

Pump and injectors installed. Wow... Now I get 25 psi boost, and zero smoke! I went with the 30HP injectors and that was plenty. They are just a Bosch factory injector from a different application with a dirrenent nozzle.



Thanks eveyone for their input, and I'd recommend Diesel Performance in Phoenix for pump work if you're in the SW US.



Take Care

Mark