CP4 Exergy " System Saver " Fuel Pressure Regulator Install - Chevy and GMC Duramax Diesel Forum
11-16 LML Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission, Etc.

 108Likes
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 152 (permalink) Old 04-27-2018, 08:43 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
CP4 Exergy " System Saver " Fuel Pressure Regulator Install

Got some pics together to outline my install of the new Exergy Fuel Pressure Regulator they call the System Saver.

Exergy FCA/MPROP Part number E05 10505

Basically, the problem with the current CP4 in the LML series, is it's prone to failure due to the new fuels with a lack of lubricity or contaminants, or cavitation when it's run dry. When the CP4 fails, it "grenades", basically blows up the internals, and sends fine metal fragments through the FPR to your fuel rails and on to your injectors. Contaminates your fuel system and requires a major fuel system replacement to the tune of $8 - $10K.
Varied responses on when it occurs and what factors cause it to occur. Some at 100k+ miles others below 50k. Not sure of what percentage of LMLs have this failure, but whatever the real number is, it would totally suck and leave you, and perhaps your trailer and family, on the side of the road at the most inopportune time.

Do a search on LML CP4 failure, there are detailed articles on this topic that are much more in depth.

I have not experienced this failure but I've personally known a person with a CP4 failure. From what I've read, it gives me enough worry to buy this new FPR in hopes of mitigating a CP4 failure until I decide what to do with the fuel pump. I may push forward with a CP3 swap at a later time. For now, I just put this in to mitigate a big failure.

Talked to the Exergy rep and he explained that the CP4 FPR has a single screen with an 80 micron filter. The Exergy FPR has dual 20 micron screens to catch metal debris and prevent it from getting to the rest of your fuel system.

Props to CDMax16, he bought the same part and installed it in his 2016. I basically did the same install we did before but I took some pics to help anyone wanting to install this. Total time was about 1.5 hrs.

It's really not that bad of an install. Just take your time and walk through removing parts until you get to the FPR.

One tool that really helped was a DeWalt 6 inch Torx T25 bit. Once you remove enough to get to the FPR, this gives you the reach to get to the two bolts. The rest of the tools are pretty standard.

[IMG][/IMG]

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4

Last edited by shortnugly; 04-27-2018 at 10:34 PM.
shortnugly is offline  
Sponsored Links
Advertisement
 
post #2 of 152 (permalink) Old 04-27-2018, 08:49 PM
DuramaxForum Veteran
 
jdwarren's Avatar
 
Join Date: Oct 2017
Location: northeastern NJ / NYC
Posts: 1,199
Nice job. Now, about those pics...?

2017 Silverado 3500 LTZ (Summit White) | CC SB SRW | Z71 | Duramax L5P | Undercover Ultra Flex bed cover | Draw-Tite front receiver | AIMS 3kw inverter-charger | Titan Travel Trekker 50-gallon auxiliary fuel tank
jdwarren is offline  
post #3 of 152 (permalink) Old 04-27-2018, 08:58 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Tools: 10mm, 15mm, pliers, 6 inch Dewalt T25, zip ties, rags, corks to stop the coolant hoses, air compressor tip to blow out spilled coolant.

First, unseat the belt from the A/C compressor. You all know how to do this.

This is all on one electrical harness:

Pull the electrical connectors from the A/C compressor radiator line.

Name:  MPROP Install (1).jpg
Views: 5488
Size:  37.7 KB
Orezona, Muzbomb, jdwarren and 1 others like this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
Sponsored Links
Advertisement
 
post #4 of 152 (permalink) Old 04-27-2018, 09:00 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Pull both electrical connectors from the A/C compressor.
Attached Images
 
Orezona, Muzbomb, jdwarren and 1 others like this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #5 of 152 (permalink) Old 04-27-2018, 09:02 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Pull connectors from the alternator
Attached Images
 
Orezona, Muzbomb and jdwarren like this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #6 of 152 (permalink) Old 04-27-2018, 09:04 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Lay the wiring harness out of the way to your right on the drivers side bay.
Attached Images
 
Orezona and jdwarren like this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #7 of 152 (permalink) Old 04-27-2018, 09:07 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Pull off the resonator, 2 10mm bolts
Attached Images
 
Orezona likes this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #8 of 152 (permalink) Old 04-27-2018, 09:20 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
Pull the coolant line off the thermostat housing.

* note, you may want to drain some coolant out of the petcock of the radiator before you do this. Or just deal with any dribbles. I caused more leakage whenever I leaned against the main 2" radiator hose by mistake.
Attached Images
 
Orezona likes this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #9 of 152 (permalink) Old 04-27-2018, 09:22 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
I had some rubber stoppers (corks) on hand to plug any dribbles.
Attached Images
 
Orezona likes this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
post #10 of 152 (permalink) Old 04-27-2018, 09:32 PM Thread Starter
Senior Member
 
shortnugly's Avatar
 
Join Date: Jan 2010
Posts: 260
You can pull the A/C compressor pretty much at any time after you disconnect the wiring harness. I coulda shown this pic earlier in the process.

4 bolts and it's free. Lay it over to your left on the passenger's side of the bay. You can see my cheater bar on the belt tensioner.
Attached Images
 
Orezona likes this.

2015 Denali HD
Airdog II 165 Lift Pump
RC Leveling Kit
Toyo Open Country AT II
Exergy FCA / MPROP
Edge CTS2
Fragile CP4
shortnugly is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Chevy and GMC Duramax Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome