CP4 going at 52k miles
Cargo Master
Joined: Feb 2017
Posts: 2,435
Likes: 732
From: Wisconsin
When the CP4 fails, if you have a warranty or not............for me the concern was where will I be on the roadside? It seems most assume it will fail near home and they'll take it in to get fixed and complain about how expensive it was or how long it took to get parts, etc. Imagine being hundreds of miles from home in a bad neighborhood at night. So I did mine when I had a one day opportunity. My advice, to those that are thinking about doing a DCR, just do it. I feel as time goes on and miles rack, these pumps will start showing bad more than ever.
Cargo Master
Joined: Feb 2017
Posts: 2,435
Likes: 732
From: Wisconsin
Perhaps ask the repairing dealership if they would install your DCR instead of another CP4, they might just go along.
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Cargo Master
Joined: Oct 2019
Posts: 2,851
Likes: 1,197
From: Southeast MO
I've already been thinking about that! Heck I'd throw them $500 if they'd do it!
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Cargo Master
Joined: Oct 2019
Posts: 2,851
Likes: 1,197
From: Southeast MO
When the CP4 fails, if you have a warranty or not............for me the concern was where will I be on the roadside? It seems most assume it will fail near home and they'll take it in to get fixed and complain about how expensive it was or how long it took to get parts, etc. Imagine being hundreds of miles from home in a bad neighborhood at night. So I did mine when I had a one day opportunity. My advice, to those that are thinking about doing a DCR, just do it. I feel as time goes on and miles rack, these pumps will start showing bad more than ever.
Lead Driver
Joined: Nov 2005
Posts: 8,477
Likes: 4,971
100%. My truck is used mostly for pulling the 5th wheel. I don't want to chance ruining a trip and figuring out the logistics of getting it repaired and everything else that goes along with that. After this I'm fully convinced it doesn't matter what you do, if it's gonna fail it will. No matter how much care you take to prevent it, it'll still fail. And honestly unless the dealer is deep in the engine they'll never know the difference.
I still use lube with ever gallon that goes in the tank.
So far, knock wood, the new pump has gone many miles more than the original.
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Cargo Master
Joined: Oct 2019
Posts: 2,851
Likes: 1,197
From: Southeast MO
I remember when you were stuck in Dexter with yours, just down the road from me. I didn't realize the pumps had an upgrade? I've been hearing they were upgraded since 2017 but they still fail.
Lead Driver
Joined: Nov 2005
Posts: 8,477
Likes: 4,971
Something to do with how the pump pistons were attached.
I don't know if it is BS if it was a helpful change or what.
Original pump went out at 115K, truck has 280K now.
OptiLube XL or similar added to every gallon of fuel since new pump install.
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Cargo Master
Joined: Oct 2019
Posts: 2,851
Likes: 1,197
From: Southeast MO
My understanding is that the change in the pumps was something that happened at some point after my truck was built, as a running change to production pumps.
Something to do with how the pump pistons were attached.
I don't know if it is BS if it was a helpful change or what.
Original pump went out at 115K, truck has 280K now.
OptiLube XL or similar added to every gallon of fuel since new pump install.
Something to do with how the pump pistons were attached.
I don't know if it is BS if it was a helpful change or what.
Original pump went out at 115K, truck has 280K now.
OptiLube XL or similar added to every gallon of fuel since new pump install.
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Lead Driver
Joined: Nov 2005
Posts: 8,477
Likes: 4,971
Was told it was a late 22 MY change, quite a while after my truck was built.
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Cargo Master
Joined: Oct 2019
Posts: 2,851
Likes: 1,197
From: Southeast MO
Thats right, I forgot about this. Mine would have had the RP7 then because I took delivery of my 2022 in Aug of 2021.
Lead Driver
Joined: Feb 2005
Posts: 7,963
Likes: 2,662
From: The Great State of Texas
Wonder if these improvements came from the CP8 pump development