I think my CP4 has started to eat itself....

[EDankievitch]

The fuel system is constantly returning in used fuel to the tank. The flow both cools the pump and injectors and purges any air induced into the system. The older mechanical pumps returned almost 90%. Not sure how much the common rail system returns. Any thing failing in the pump will end up in the tank before long.

 

[Ozymandias]

I think if the pump fails, it will be fast from my knowledge. Within a couple Miles once the process of self destruction starts.

 

[p-Bar]

The China syndrome

 

[TFucili]

Guy's it is not Chrysler who choose the CP4.2 fuel pump for the Cummins engine! It was design decision by Cummins Inc. the CP4.2 is used across all models of the 6.7L CGI engine built at all of there plants. All of the production of the CMEP is shipped to Ram for their diesel trucks but other OME's use the 6.7L engine to. These are built at another pant at a lower horsepower rating for the other OME that use the 6.7L engine.

I have an email from Cummins stating that the Ram application is the only one currently using the CGI block.

 

[Bug Out]

I have a 2500 mile RV move to do this weekend and I'm praying this CP4 junk does not give out while I have the RV hooked to my truck. What a hell of a thing to have to think about with a 70K truck.

 

[Jim W]

I have an email from Cummins stating that the Ram application is the only one currently using the CGI block.

I was mainly referring to the CP4.2 pump.
But when I was at the Rally last year that was held in Columbus, one of the tour guides was a production manager. He stated that all of the production at the Columbus plant was made for Ram, and all other production that was required for the 6.7L was made at another facility. He did insinuated that the other manufactured engines were similar to the Columbus plant, making no distinctions between engine blocks. Just saying what he stated!

 

[TFucili]

I just reveived a follow up email clarification on the 6.7 HPCR pump question:

Some are the CP3 pump. It really depends on the chassis the engine is going into, and what the OEM specifies

So it would appear that not all non-Ram 6.7s are getting the CP4. Interesting.

 

[gsbrockman]

I just reveived a follow up email clarification on the 6.7 HPCR pump question:

Some are the CP3 pump. It really depends on the chassis the engine is going into, and what the OEM specifies

So it would appear that not all non-Ram 6.7s are getting the CP4. Interesting.

Wonder if the 4500’s and 5500’s fall into the CP3 category?

I may need to go to Somerset Saturday and pop the hood on this one:

https://www.donfranklincdjrf.com/ex...ssis+Cab-5e82bc3c0a0e0ae75d31a1ffb6a7fc28.htm

 

[SnoKing]

Wonder if the 4500’s and 5500’s fall into the CP3 category?

I may need to go to Somerset Saturday and pop the hood on this one:

https://www.donfranklincdjrf.com/ex...ssis+Cab-5e82bc3c0a0e0ae75d31a1ffb6a7fc28.htm

The 550 that I posted a picture of, had a failed CP4.2. At 9K+ on the clock.

 

[TFucili]

Wonder if the 4500’s and 5500’s fall into the CP3 category?

I may need to go to Somerset Saturday and pop the hood on this one:

https://www.donfranklincdjrf.com/ex...ssis+Cab-5e82bc3c0a0e0ae75d31a1ffb6a7fc28.htm

I don't think so, Greg. This was pertaining to non-Ram applications.

 

[Signal73]

10k filter change. I will usually never hit the mileage, but time out (1 year or 15k). I didn’t really come across any surprises. No huge mess. I let the rear and front drain before removal. Opened the rear drain and opened the housing a couple turns to break the vacuum. Im going to get a longer length of hose for the front so it will hang down by the axle. I did have the usual glitter (visible in first photo) in my frame mounted filter housing, same as OP.

 

[SnoKing]

So Racor primary is no more??? That is to bad, they are good filters.

 

[Signal73]

I haven’t changed out a 18 and earlier, so I’m not sure what they used. It does appear they are doing their jobs, you can see the difference between primary/secondary filters.

 

[gsbrockman]

So Racor primary is no more??? That is to bad, they are good filters.

Parker / RACOR still manufactures the rear separator, albeit in a cartridge style now. @Cummins12V98 and I discussed this somewhere previously.

 

[Jim W]

I see that "S&S Diesel Motorsport" is Now Offering a 19+ Ram CP3 Conversion Kit for sale. I got this in an e-mail from "Diesel Army News" which I receive in about every other day.

Here is the link to the entire article.

https://www.dieselarmy.com/news/ss-...rsport-now-offering-19-ram-cp3-conversion-kit

Just saying in anyone who wants to spend the bucks, here is a way to spend the money.

 

[Tuesdak]

I was looking at this last night for a possible new RAM... Some other companies out there as well doing CP3 conversions. 10% of a $70K truck is $7,000.00 So a $2,700.00 CP3 kit is less than taxes paid... To bad it would give FCA an easy out on warranty. Regardless fixing OEM beancounter disasters is where the aftermarket really shines.

https://ssdiesel.com/new-product-feature-2019-ram-cp3-conversion-kits/

 

[Ozymandias]

I see that "S&S Diesel Motorsport" is Now Offering a 19+ Ram CP3 Conversion Kit for sale. I got this in an e-mail from "Diesel Army News" which I receive in about every other day.

Here is the link to the entire article.

https://www.dieselarmy.com/news/ss-...rsport-now-offering-19-ram-cp3-conversion-kit

Just saying in anyone who wants to spend the bucks, here is a way to spend the money.

The fun part is that no one knows how a permanently over clocked CP3 held up.

 

[dieselshadow]

The fun part is that no one knows how a permanently over clocked CP3 held up.

Agreed. You may be replacing one potential bomb with another.....on your own dime.

 

[TFucili]

The fun part is that no one knows how a permanently over clocked CP3 held up.

True, but you certainly don't have to worry about the mickey mouse rollers failing and/or turning in their bores, plus the bottom end is more stout.


Industrial Injection has a CP3 conversion, as well.

 

[JR]

@Cummins12V98 and I discussed this somewhere previously.

I'm pretty sure he all but bet the farm on a few occasions it was a Fleetguard