Low pressure side, or maybe the primary side of the fuel system.

 

My mind won't truly be at ease, not with the possibility of the cp4 eating itself again some day.
Won't be able to go back to being blissfully unaware...

 

if that’s true and you’re not saying that tongue in cheek then spend the 1900 and put a DCR pump in the truck.

hopefully you’ll enjoy it after it’s back, no reason not to

 

Or just put on a "Gen2.1 Disaster Prevention Kit" so it doesn't eat the entire system.

 

true that could help ease his mind as well

 

First thing I did in both my 6.7 trucks was a DPK. Put my mind at ease right away knowing that if the SHTB with the CP4, I just need to flush the return line to filter and swap out the pump. I probably wont know it went bad until it can no longer pump like what happened with the S&S test when they purposely destroyed the pump. If it goes before 100K I will put the new non CP4 pump on, if it happens close to 200K then another CP4.

What is most destructive to the HPF is the very fine particles of metal that get past the screen on the fuel flow regulator on top of the pump. This is the stuff that causes the actual damage to the injectors and works its way back to the tank if there is no filter installed. Once that gets in the tank then the system is done for and needs to be completely disassembled and cleaned out. The larger stuff wont get past the screen on the FFR. With the DPK installed, all this fine and larger particles don't get anywhere near the FFR, but instead go out the return line and get trapped by the microfilter of the S&S kit. The really fine stuff can get past the SPE filter screen and can get into the rest of the system, though both the primary and secondary filters will catch it before it can reach the CP4.

All the lines can be flushed out, but the HP fuel lines are a one and done, like a stretch bolt, they are a one time use and very expensive. Half the kit cost is in the lines. All the HP side gets replaced, that leaves the low pressure lines that get flushed and back flushed, the tank is drained and dropped and wiped out as much as can be reach then flushed and drained to get as much of the particles out, and the lower fuel filter housing is cleaned out.

I recommend getting the S&S kit, though I prefer the looks of the SPE, the S&S includes a far better return filter, and have them install it while they have it all apart. It will give you the peace of mind down the road.

 

Well, my understanding of these disaster prevention kits is that they just keep the shrapnel from recirculating through the entire system, not keeping the major components from failing.

 

I’m not sure about the design of all the different kits. But from what I have seen the S&S kit is the best and has been engineered so when a CP4 goes bad it doesn’t tank the whole system. Making the repair faster and cheaper.

Now if you’re under warranty cheaper doesn’t matter to you. But faster would matter.

 

Correct, they decrease the collateral damage from a CP4 failure, in turn greatly reducing the repair cost but do not eliminate or even minimize the chance of that CP4 failing.

 

What takes the most time for warranty repair is getting the backordered parts.

 

Well you certainly can stay with what you have and be stranded in the middle of nowhere or drive towards civilization and just replace a few components instead of the entire system on back order. You got lucky with the parts next time maybe not.

It seems you make your money with your truck as it sits in the repair shop probably nearing a month by the time you get it back no revenue generated. Sure warranty covered it but warranty did cost money and time while they decided what they might do.

When I get back to AZ this winter a disaster kit will be in order but then I self insure no warranty for me.

 

Would need a lot less parts with an S&S kit installed. Could speed it up?

Plus, and I’d have to confirm, I think it might allow a truck to limp to a service facility vs being stuck instantly roadside? Maybe someone with the kit could chime in on that part.

And if you’re not getting extended warranties you also won’t be under warranty one day.

 

But, the disaster kit does not keep the pump from failing, so I could just as easily be stranded whether I had it on there or not.
And, the most expensive parts are still the ones that fail.

Anyway, while my warranty is still in effect, until 200K, then I will leave it stock.

 

From what I've seen in the S&S video, where they intentionally destroy the CP4 on their truck, it does look like having the DPK kit extends the ability for the truck to continue driving. Could have something to do with keeping the debris out of the high pressure side of the system.

 

if you (or anyone else) hasn’t seen this take a look. S&S does such a thorough job on the stuff they put out it’s pretty cool.

lots of great info not only about the Stanadyne DCR pump they retrofitted for super duties but some good tie bits on high pressure diesel fuel systems too