CP4.2 Owners Club

[Tuesdak]

Injector/Pump do not cost near what has been posted. It violates Forum rules to post pricing.

I did ask between the lines and you answered. The TDR 106 article I ballparked the numbers from may need a little work...

 

[sag2]

The prices listed in issue 106 were accurate at the time it was written. I would assume they will come down as time goes on just like VP44 and CP3 pumps did. I recall the first VP44 pumps were over $5k when they first were introduced.

 

[gsbrockman]

The 2019 rear separator filter is indeed a cartridge style now. I’ll ask over on CF if anyone has changed their filters on a 2019 yet and see if the rear separator is Fleetguard or another manufacturer.

I had not originally intended in perusing this thread, but I got sucked into it. Appears to be some decent material in here as well.

Looks like the rear separator is still Parker/RACOR based on this post over on CF...

https://www.cumminsforum.com/forum/...el-water-separator-2019-a-5.html#post29154583

 

[Cummins12V98]

Glad to hear that!!!

 

[HPSimpson]

I recently change the rear Mopar 68436631AA is in fact a cartridge style pretty simple to do. The reason was though fuel dealer had pumping problem, ran tank near empty and I wanted to not have a problem.

 

[cwbyinjeep]

So who’s ready for a CP5? ‍

 

[lpennock]

So who’s ready for a CP5? ‍

Isn't the CP5 equipped with a timer that causes it to fail 1 day after the warranty expires? And dumps raw fuel in the oil when it fails to make sure it takes out the engine.

 

[Signal73]

Well if it’s any consolation there’s been a documented L5P High pressure pump failure at around 200k on the ticker, wiping out the injectors. 10k+ repair bill.

 

[TCDiesel]

The LP5 Duramax engine fuel system is provider By Denso, Bosch lost the Contract to Denso in 2017. The Denso HP4 was used in the 2008-10 6.4 Ford.

Rumor has it Bosch May? be returning in 2022 D-Max. "Rumor only" I have not be able to confirm the hearsay.

Denso HP4 on left, Bosch CP3 LBZ/LMM D-Max Right.

#ad

 

[Jim W]

OK; I went back and reread the entire thread! I will repeat the main question that has been posted in this thread!

WHO HAS SEEN OR READ ABOUT ANY CP4.2 FUEL PUMP FAILURES WHEN BEING USED ON THE CUMMINS ENGINE?

Speculation is great and sometimes does help but there has been 8 pages of this debate! Due to the speculation some user of the newer Ram trucks are ready to dump their fuel systems for either a rebuild of the CP3 to adapt to the newer trucks or add an entire different pump!

I think based on my experience when a corporation introduce a new product or update to that product testing is done! I am sure that several Cummins engine were tested with the improvements made to this series of engines.

I know people do not like to have a failure on their vehicles and expect them to run for ever without a failure, but that is not the really world! Failure will and do occur early and before the component could wear out. This is known as the B10 life of a component. Which means that 10% of the units built will fail before they reach maturate, which in the industry is an acceptably rate. So how many CP4.2 fuel pumps are built each year and how many have failed since the introduction?

I would also like to see an ISHIKAWA DIAGRAM on the failures if any to the CP4.2 fuel pump on a Cummins engine!

 

[cwbyinjeep]

The LP5 Duramax engine fuel system is provider By Denso, Bosch lost the Contract to Denso in 2017. The Denso HP4 was used in the 2008-10 6.4 Ford.

Rumor has it Bosch May? be returning in 2022 D-Max. "Rumor only" I have not be able to confirm the hearsay.

Denso HP4 on left, Bosch CP3 LBZ/LMM D-Max Right.

#ad

I’ve heard rumor there may be a CP5 coming in 2021, not sure if that’s model year or calendar though.

 

[TFucili]

I think it would be a HIROSHIMA diagram, in this instance

 

[R.Taylor]

I'm happy with my CP4.2.... It's been on a strict diet of clean fresh diesel and OptiLube XPD since day one and will do so for however long I own the truck.

 

[Newsa]

I'm happy with my CP4.2.... It's been on a strict diet of clean fresh diesel and OptiLube XPD since day one and will do so for however long I own the truck.

I think the CP4 and CP4.2 had the most problems when the injection pump was doing all the work and not assisted by a lift pump. The CP4 doing all the work was in some duramax models

You may have a winning combination there. It doesn't provide me comfort though not knowing the quality of the fuel we get at random stations. That is just something none of us really have control over.

 

[Ozymandias]

The CP 4.2 did have any problems because it is a brand new design.

 

[Newsa]

The CP 4.2 did have any problems because it is a brand new design.

I thought the only difference between the CP4 and the CP4.2 was a low friction coating affixed to the cam lobe that usually gradually gets eaten away?

 

[Ozymandias]

Is this verified? I dont think so, I don't see a Bosch Engineer here in the Forum.
We know nothing - except something that is visible to the eye when disassemble it.
No metallurgy, no slight differences in angles, nothing.
We know nothing about that 4.2

 

[TFucili]

I keep hearing it is a new design, yet not a soul has produced a solitary shred of evidence to support that. Just proclamations.

Let's see a teardown video, or a powerpoint presentation showing how wonderful the new design is.

 

[Ozymandias]

I keep hearing it is a new design, yet not a soul has produced a solitary shred of evidence to support that. Just proclamations.

Let's see a teardown video, or a powerpoint presentation showing how wonderful the new design is.

Like I say, we know nothing, just the statement from the Engineers a CMEP that told us face to face that this pump is new and improved and that they trust in it.

That's the only thing we know.
We can run this Topic now for years, it doesn't change our knowledge the slightest bit as long as BOSCH keeps the secrets.

 

[dieselshadow]

I keep hearing it is a new design, yet not a soul has produced a solitary shred of evidence to support that. Just proclamations.

Let's see a teardown video, or a powerpoint presentation showing how wonderful the new design is.

Are you volunteering to open up your new '19 to do so? LOL

Right now I'm doubting many places (or owners) are willing to shell out the cash to buy one to tear one apart. Any blown out under warranty would surely be immediately and quietly shipped off to a dark lab somewhere. I'd also be willing to bet the manufacturers are being a bit tight lipped about this new pump on purpose as to not bad-mouth one or another or themselves.

We won't really get to know for a while yet. We'll have to wait until someone like TC gets his hands on one and shares the info.