Injector Pump leaking

Topic: Injector Pump leaking (Read 1784 times) previous topic - next topic

Injector Pump leaking

October 30, 2015, 05:06:29 pm

Anyone had any experience with Cummins in Chattanooga Tn? Checked under the coach this morning found fuel leaking from the back of the pump. Looks like it's coming between the pump body and end cap. I checked all the fuel lines cleaned and checked still leaking.

Re: Injector Pump leaking

Reply #1 – October 30, 2015, 05:17:40 pm

Your best bet may be a shop that can disassemble and reseal/rebuild the pump. Any diesel injection shop should be able to repair. If they are unable to pull it off the engine, they should be able to refer you to a good shop that can. I would imagine all a cummins shop would be able to do is swap it for a new/reman pump.

Re: Injector Pump leaking

Reply #2 – October 30, 2015, 05:40:32 pm

Are you sure it is the Injector pump (CAPS pump) and not the lift pump? Lift pump is not rebuildable according to Cummins, but the lift pump is a lot cheaper than the CAPS pump. About $350 or so for the part... changing it is a pain though.
Don

Re: Injector Pump leaking

Reply #3 – October 30, 2015, 07:19:46 pm

Hey Don it is the CAPS pump, it's leaking on the end where the injector lines are. All the lines are tight and dry, I hope Cummins can reseal it. Rebuilt pumps are a might pricey from what I'm seeing. At least we are not dead in the water its not leaking bad. The lift pump is less than a year old. I'm betting at least 2 coach bucks min.

Re: Injector Pump leaking

Reply #4 – November 02, 2015, 02:43:35 pm

Well we have a plan. Going to stay with my daughter and take the coach to Freightliner in Decater Ala Monday to see what they can do with it we'll see how that works.

Re: Injector Pump leaking

Reply #5 – November 02, 2015, 03:14:49 pm

Quite a few have converted the 8.3 Cummins CAPS pump to a Bosch P pump. As I remember, it bolts up but will need injection lines. Will throw a fault code each time the key is turned on. Lots of low mile failures with the CAPS but others get many miles with them. Might be worth investigating.

Pierce

Re: Injector Pump leaking

Reply #6 – November 02, 2015, 06:38:30 pm

Pierce I did think about that. If I was back in central Florida where I have connections to pump shops and a private place to park with a full shop. I would take a good look at it. Be as we live in the Coach full time and are about 2 mos from there going to have to go with a Cummins reman (4K) if it can't be fixed

Re: Injector Pump leaking

Reply #7 – November 02, 2015, 08:04:48 pm

Bruce,

I understand completely. If you have to go the reman route, I would want a pretty good warranty on the CAPS pump. I have bruised and cut myself many times R&Ring Bosch MW and MRSF pumps for added fuel recalibration (more HP). Have never seen one give any kind of trouble other than normally replacing the fuel return valve. Generally, they will outlast the engine.

Pierce

Re: Injector Pump leaking

Reply #8 – November 02, 2015, 08:08:50 pm

I would like to see at least 3 years, but probally do good to get a year.
I agree most fuel pumps will out last the motor it's attached to.

Re: Injector Pump leaking

Reply #9 – November 09, 2015, 12:42:37 pm

Well coach went to the Freightliner shop in Decater Al to check the fuel pump leak, we'll see. I did notice the labor rate was 127.00 per hr.

Re: Injector Pump leaking

Reply #10 – November 10, 2015, 08:01:51 pm

Shop called need a rebuilt CAPS injector pump $5400.00 installed. Ouch but got to have it.

Re: Injector Pump leaking

Reply #11 – November 10, 2015, 08:32:43 pm

How many hours @ $127 per? That is a BIG ouch!
Don

Quote from: bbeane – November 10, 2015, 08:01:51 pm

Shop called need a rebuilt CAPS injector pump $5400.00 installed. Ouch but got to have it.

Re: Injector Pump leaking

Reply #12 – November 10, 2015, 08:56:02 pm

That's really expensive! Sorry to hear the news.

P

Re: Injector Pump leaking

Reply #13 – November 10, 2015, 09:09:07 pm

Big ouch pump was $3850.00 the rest is labor, tax and freight. About 9 hours or so labor.

Re: Injector Pump leaking

Reply #14 – November 14, 2015, 02:43:36 pm

Picked up the coach last night from Neely Coble Freightliner in Decater Al. Rebuilt Cummins CAPS fuel pump installed ( 5 1/2 coach bucks) after 200 miles all looks good. Seems like it's got a little more power.

Re: Injector Pump leaking

Reply #15 – November 14, 2015, 06:56:43 pm

Quote from: bbeane – November 14, 2015, 02:43:36 pm

Seems like it's got a little more power.

That's cuz your wallet is a lot lighter. Less weight = better performance!

Re: Injector Pump leaking

Reply #16 – November 14, 2015, 07:45:44 pm

Quote from: Chuck & Jeannie – November 14, 2015, 06:56:43 pm

That's cuz your wallet is a lot lighter. Less weight = better performance!

You are probably right. Kind of a big chunk of money for a something the size of a shoe box. The only place you can get one is cummins.

Re: Injector Pump leaking

Reply #17 – November 15, 2015, 10:39:33 am

After I read this I immediately looked to see if I could find used, rebuilt, ebay, etc. Nope. Ouch. I'll have to keep my fingers crossed if the 99 M11 uses a similarly expensive pump.

Re: Injector Pump leaking

Reply #18 – November 15, 2015, 12:46:53 pm

Quote from: bbeane – November 10, 2015, 09:09:07 pm

Big ouch pump was $3850.00 the rest is labor, tax and freight. About 9 hours or so labor.

I think book rate is 2.5 hrs R&R with 15 minutes additional for the black light leak test. 2 hours is about what it seems to take on Cummins forums.

See details at: http://cumminsfirepower.com/documents/CFP08E%20(12).pdf Pages 12-179 to 12-183

Pierce

Re: Injector Pump leaking

Reply #19 – November 15, 2015, 01:09:12 pm

For Cummins 8.3 owners, you might prepare to change over to a Bosch pump by getting all the parts together well ahead of time. Here is a NOS pump for $495: 3354438 Auto P Pump Bosch 8 3L 6C Cummins Turbo Diesel Fuel Injection Pump |... These pumps will outlast 2 or 3 engines and still be going strong. While these are great pumps out of the box, it's a good idea to take a new or used Bosch pump to a pump shop and have them put it on the bench for an hour or two (in the old days, faster now) to get all six cylinders exactly the same from idle to max RPM. The Bosch factory only spends about 15 minutes when they are new to get them close. The injection shops can also add fuel for more HP. These pumps can be purchased used with confidence, especially if taken to a pump shop.

Here is the latest Bosch flow testing bench. We collected the fuel in glass vials but the new style does it much faster and more accurately. Here is a short 1:23 video of the new bench:
http://www.youtube.com/watch?v=Qty6ZK8o6U8

Pierce

Re: Injector Pump leaking

Reply #20 – November 16, 2015, 10:33:23 am

Some pretty major changes involved in installing a P pump to replace a CAPS pump on an 8.3.

I've had good luck with having pumps rebuilt by independent shops. Of course kind of tough to do if you're on the road and can't wrench on it yourself.

Re: Injector Pump leaking

Reply #21 – November 17, 2015, 07:23:34 pm

Hey Chuck, I agree on the pump changing, little more to it than swapping pumps. By the time the dust settles cost would be about the same. I checked with all the pump shops from Birmingham to Nashville all of them told me no parts out there Cummins only.

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