CP4 Disaster Strikes
FTE Legend
Joined: Mar 2017
Posts: 31,982
Likes: 9,201
From: Western NY
I think the OP is referring to the warranty on the parts/labor of installing the new CP4, not the original manufacture warranty. If that's they case, they may void it if DPK is installed. However, like any other warranty claim, seems to be dealer dependent.
In terms of the newer CP4 pumps, they have pinned the roller which is actually a huge upgrade. Yes, they can still fail as there is a lot of cam lobe lift inherent to the CP4, but the fact that the lifter is pinned is actually a big deal imo. So it doesn't spin around, which causes definite failure of the pump. Glad Bosch figured this one out.
Regarding additive, pick Hot Shots every diesel (performance dose), or Archoil. Idk much about K100, but Overkill swears by it and I trust him. Additive is NOT snake oil. I'm just going to say it like it is. No need to beat around the bush on this matter as it's not really an opinion at this point. You're basically improving US spec diesel to European specs that the CP4 was designed for. If your pump fails after using good additive in every tank, then that's either wear-and-tear, or just a faulty pump to begin with. At least you did your part.
In terms of the newer CP4 pumps, they have pinned the roller which is actually a huge upgrade. Yes, they can still fail as there is a lot of cam lobe lift inherent to the CP4, but the fact that the lifter is pinned is actually a big deal imo. So it doesn't spin around, which causes definite failure of the pump. Glad Bosch figured this one out.
Regarding additive, pick Hot Shots every diesel (performance dose), or Archoil. Idk much about K100, but Overkill swears by it and I trust him. Additive is NOT snake oil. I'm just going to say it like it is. No need to beat around the bush on this matter as it's not really an opinion at this point. You're basically improving US spec diesel to European specs that the CP4 was designed for. If your pump fails after using good additive in every tank, then that's either wear-and-tear, or just a faulty pump to begin with. At least you did your part.
There's too much to risk, not taking precautions like using additives every tank and/or getting a dpk or a DCR.
From the folks here who have had a failure very early into their trucks life to the guys going out 200k plus with their original CP4, its a roll of the dice that I'm not willing to take.
Then there's the famous 922k mile 17 6.7 that was worked hauling campers with the original CP4 and the religious use of additive along with regular stock fuel filter changes. If that's not a testament to modern fuel additives, then I don't know what is.
And saw the DCR just increased to $2400 for those who will be buying one to replace a CP4. I'll replace my CP4 when it fails... time will tell but I'm ready.
Tuned
Joined: Aug 2024
Posts: 415
Likes: 140
I may be one of the few, but I believe with an additive and regular fuel filter changes to maintain proper fuel pressure, the CP4 is non-inferior to other injection pumps. Cummins is now using the CP8, which appears to be very similar to the CP4.2.
The reason GM and Ram recalled those pumps was because they didn't know better at the time. The CP4 was new and I think GM didn't even have a primary fuel pump to supply it. These Fords push 55-60 psi of fuel to the CP4. When fuel filters get dirty, the feed pressure goes down. That's why it's important to change them. Now you don't have to be ocd about it, but just don't neglect it. Every 15-20k should do. And make sure there's no water in the tank of course. That applies to any brand.
The reason GM and Ram recalled those pumps was because they didn't know better at the time. The CP4 was new and I think GM didn't even have a primary fuel pump to supply it. These Fords push 55-60 psi of fuel to the CP4. When fuel filters get dirty, the feed pressure goes down. That's why it's important to change them. Now you don't have to be ocd about it, but just don't neglect it. Every 15-20k should do. And make sure there's no water in the tank of course. That applies to any brand.
Tuned
Joined: Aug 2024
Posts: 415
Likes: 140
I'm in the same boat.. haha. Hopefully not for a long time.
Laughing Gas
Joined: Mar 2004
Posts: 751
Likes: 11
From: May Township, MN
If you do a google search you'll find examples. I see them from time to time go through Copart and IAA with junk engines due to fuel contamination. It's not very common but it can and does happen.
My buddy has a 2012 F350 6.7 King Ranch with 605K miles that has basically everything still original on it. He bought it from a 1 owner hot shot.
My buddy has a 2012 F350 6.7 King Ranch with 605K miles that has basically everything still original on it. He bought it from a 1 owner hot shot.
FTE Legend
Joined: Mar 2017
Posts: 31,982
Likes: 9,201
From: Western NY
I may be one of the few, but I believe with an additive and regular fuel filter changes to maintain proper fuel pressure, the CP4 is non-inferior to other injection pumps. Cummins is now using the CP8, which appears to be very similar to the CP4.2.
The reason GM and Ram recalled those pumps was because they didn't know better at the time. The CP4 was new and I think GM didn't even have a primary fuel pump to supply it. These Fords push 55-60 psi of fuel to the CP4. When fuel filters get dirty, the feed pressure goes down. That's why it's important to change them. Now you don't have to be ocd about it, but just don't neglect it. Every 15-20k should do. And make sure there's no water in the tank of course. That applies to any brand.
The reason GM and Ram recalled those pumps was because they didn't know better at the time. The CP4 was new and I think GM didn't even have a primary fuel pump to supply it. These Fords push 55-60 psi of fuel to the CP4. When fuel filters get dirty, the feed pressure goes down. That's why it's important to change them. Now you don't have to be ocd about it, but just don't neglect it. Every 15-20k should do. And make sure there's no water in the tank of course. That applies to any brand.
Prior to the S&S dpk install, I saw mid 80s and then by the end of the filter set life, high 70s.
Now with the S&S kit, I see high 80s/low 90s (no higher than 92) and at end of filters service life, mid 80s or so... wild that I saw a slight increase in pressure with the S&S kit.
FTE Legend
Joined: Mar 2017
Posts: 31,982
Likes: 9,201
From: Western NY
So the DPK then?
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Lead Driver
Joined: Feb 2022
Posts: 7,999
Likes: 4,065
How do you know the additives are NOT made from Snake oil? OIl is oil when it comes to lube. LOL
Yes a CP4 CAN destroy the engine and Yes due to the gear rotating on the crank. If the pump seizes, it can lock the gear which locks the big gear which locks the crank gear, and Boom, engine broken. The CP4 has to be in really bad condition for that to happen and should have been caught long in advance. This is one reason I like the clear bowl of the SPE.
Yes a CP4 CAN destroy the engine and Yes due to the gear rotating on the crank. If the pump seizes, it can lock the gear which locks the big gear which locks the crank gear, and Boom, engine broken. The CP4 has to be in really bad condition for that to happen and should have been caught long in advance. This is one reason I like the clear bowl of the SPE.
Cargo Master
Joined: Feb 2020
Posts: 2,277
Likes: 949
How do you know the additives are NOT made from Snake oil? OIl is oil when it comes to lube. LOL
Yes a CP4 CAN destroy the engine and Yes due to the gear rotating on the crank. If the pump seizes, it can lock the gear which locks the big gear which locks the crank gear, and Boom, engine broken. The CP4 has to be in really bad condition for that to happen and should have been caught long in advance. This is one reason I like the clear bowl of the SPE.
Yes a CP4 CAN destroy the engine and Yes due to the gear rotating on the crank. If the pump seizes, it can lock the gear which locks the big gear which locks the crank gear, and Boom, engine broken. The CP4 has to be in really bad condition for that to happen and should have been caught long in advance. This is one reason I like the clear bowl of the SPE.
FTE Legend
Joined: Mar 2017
Posts: 31,982
Likes: 9,201
From: Western NY
While I would have bought a DCR built in China, I do not mind spending $400 to buy one built here and with improvements...
I hope never to buy one, but if need be, Made in the USA babee...
Lead Driver
Joined: Feb 2022
Posts: 7,999
Likes: 4,065
'MERICA!!
See, Tariffs do work! LOL
I actually found a few places that make 3D filament right here in the good ol USA. Too bad the prices can't compare to Korean filament. It would cost me $80 more to fill my AMS. All we need now is a bit more competitive pricing on consumables.
See, Tariffs do work! LOL
I actually found a few places that make 3D filament right here in the good ol USA. Too bad the prices can't compare to Korean filament. It would cost me $80 more to fill my AMS. All we need now is a bit more competitive pricing on consumables.
FTE Legend
Joined: Mar 2017
Posts: 31,982
Likes: 9,201
From: Western NY
'MERICA!!
See, Tariffs do work! LOL
I actually found a few places that make 3D filament right here in the good ol USA. Too bad the prices can't compare to Korean filament. It would cost me $80 more to fill my AMS. All we need now is a bit more competitive pricing on consumables.
See, Tariffs do work! LOL
I actually found a few places that make 3D filament right here in the good ol USA. Too bad the prices can't compare to Korean filament. It would cost me $80 more to fill my AMS. All we need now is a bit more competitive pricing on consumables.
