Preventative CP4 replacement

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Mar 25, 2026 | 11:53 AM

#16

kayakingpoodle

Laughing Gas

Joined: Jan 2024

Posts: 837

Likes: 456

From: Up in Texas

Quote:

Originally Posted by Stinson1

Thanks guys, I have called S&S and I have watched every video they have put out. I also understand this is a Stanadyne pump. I need to see more data before I am ok with my press fit crank gear spinning a pump that Ford didn't spec for this application. I am just not ready to jump in yet, S&S has informed me they are doing testing now and will be providing a video. I am watching this pump closely.

You can also take the front cover off while doing either pump and have a field welder come tig weld the gear to the crank and it slipping becomes a non issue. It's more money, but once it's done you can sleep well. Before people start in about welding it with the crank in the block, a decent welder will make sure the ground path doesn't weld the crank to the bearings. This type of stuff is done 100's of times a day on things that cost way more than the entire superduty this particular crank is in.

Mar 25, 2026 | 03:12 PM

#17

augam

More Turbo

Joined: Jun 2023

Posts: 590

Likes: 249

Quote:

Originally Posted by Stinson1

Hey guys, we run a 2018 6.7 in our business that runs emergency calls. I like to do what I can up front to prevent unplanned down time. The truck has been great, normal maintenance but it has 150K miles and I am thinking about a pump replacement. I am very up to speed on the DCR and DPK options. At this point I do not fully trust the DCR, I am a big fan of S&S and really I am impressed with the quality of the products but I am not ready to jump to a DCR yet. I want to see data showing what peak forces are required to turn a loaded (pumping fuel) DCR pump vs a CP4, until I see that I am not feeling great about driving an different pump off a pressed on crank gear. I have emailed S&S and was surprised they did not have this data, but they said they were going to do some testing and put a video out.

Anyway to make a long story short, I am thinking about putting a 2020 pump in with the pinned buckets and a DPK at this time. So a couple questions, my ford dealer is not helpful. If I order a replacement pump for a 2018 is the pump updated with the pinned buckets or do I need to order a 2020 pump? If I do install a 2020 pump, is everything plug and play? Does the metering valve need to be swapped?

Thanks

Assuming ‘emergency calls’ are much less frequent than ‘daily use’ the DCR would appear to be the better solution for this particular truck for $1400 extra $$$$. DCR pumps have had some miles piled up on them and there are no known cam/crank slip issues reported thus far that I have heard of.

Also the pinned pumps have had issues of failure.

Perhaps I am missing something.

Mar 27, 2026 | 08:07 AM

#18

Stinson1

Thread Starter

Mountain Pass

Joined: Mar 2017

Posts: 211

Likes: 63

I decided to just go ahead and throw on the S&S DPK like my personal truck for now. I plan to continue to watch how the DCR is doing in the real world and might jump to that in the future. Thanks for all the opinions on this.

Mar 27, 2026 | 11:39 AM

#19

scraprat

Lead Driver

Joined: Jan 2002

Posts: 8,616

Likes: 4,698

From: Itinerant

Quote:

Originally Posted by Stinson1

Nothing scientific but a couple readings were done in this thread. DCR has been in the truck for 1.5 year now, roughly 14k miles on it pulling a 16k#+ 5th wheel for 8-9k miles of those through western mountains at high elevation with no issues.

https://www.ford-trucks.com/forums/1...l#post21391888