Please Help. Someone has to have an idea whats going on. - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Fifth Generation: 2011-2016 (LML)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Advertise


Duramax Fifth Generation: 2011-2016 (LML) Discuss the fifth generation (2011-2016) of the 6.6L Duramax diesel engine & associated components. Engine related discussion ONLY.

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 03-25-2019, 10:46 AM   #1 (permalink)
Mic Hubble
Diesel Fanatic
 
Mic Hubble's Avatar
 
Join Date: Jul 2006
Location: Bandera, TX....
Posts: 130
iTrader Score: 0 reviews

Please Help. Someone has to have an idea whats going on.

Ok, Im going to try and keep this as short and to the point, but this has been a process.

I have a 16' 3500 DRW that I only tow heavy with. It has been a great truck up until this issue came up. My longest trip I use it for is out to glamis and back which is about 1100 miles each way. It pulls My 50' race trailer around 20k lbs. I put 10k miles on the truck stock then did the ppei tuning with sotf, delete, fass lift pump/ filter combo, SB cold air intake and full exhaust. First trip with tune/ delete about 100 miles in I blew the hot side intercooler boot off the turbo where its pretty common to blow. I got through that trip with driving it easy and putting a T-bolt clamp on it. I found several people that had the same issue so I opted to upgrade and got the afe hot side intercooler pipe kit. I also realized that the sotf switch messed up some how and I was on the biggest tune while towing. (200hp) I took it back to the shop that installed everything and got the switch/ tuning issue fixed and installed the afe pipe.

Now, I just got back from the same 2200 mile trip. well, its not fixed. about 150 miles in, boom, pipe blows off turbo. The afe pipes have silicone couplers. Now the silicone coupler is melting out to the point the clamp cant hold it on. Luckily I had several 2.5-3.0 silicone couplers and replaced it a few times and just kept boost 20 psi and under and limped it through the trip.

The truck runs and drives great.

This is what I have done. I put a boost gauge on hot side of intercooler to see if there was a big pressure diff, and the most I can get is about 10 psi on spikes and it runs about 5-8 psi higher most of the time. I unplugged the egr plugs and the Throttle valve. I called several diesel shops and got nothing from most, but the ones that would offer anything told me to unplug the plugs I mentioned above, maybe bad intercooler, maybe bad turbo actuator? I never got any good hard answers on what could be causing this.

At this point I'm thinking about installing a new aftermarket intercooler and turbo (something similar the the 63mm cheetah) and seeing if it fixes it, But I hate throwing parts at a problem to just continue to have the same issues. I will have a proper EGT gauge installed because the one on my monitor cant be right because it only goes up to 700 deg pulling, and idles at around 200 deg.

Im looking for any help on what is going on here.

__________________
2016 Dually
05 CCSB LT Silverado prerunner turbo desert toy
05 Silverado RST, Twin 76mm custom kit ON New Gen LSX 427 WITH TH400/GV...best of [email protected] and still has ac.....
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-25-2019, 06:00 PM   #2 (permalink)
Joey D
Diesel Kingpin
 
Joey D's Avatar
 
Join Date: Sep 2003
Location: Arlington MA
Posts: 4,968
iTrader Score: 1 reviews

Quote:
Originally Posted by Mic Hubble View Post
Ok, Im going to try and keep this as short and to the point, but this has been a process.

I have a 16' 3500 DRW that I only tow heavy with. It has been a great truck up until this issue came up. My longest trip I use it for is out to glamis and back which is about 1100 miles each way. It pulls My 50' race trailer around 20k lbs. I put 10k miles on the truck stock then did the ppei tuning with sotf, delete, fass lift pump/ filter combo, SB cold air intake and full exhaust. First trip with tune/ delete about 100 miles in I blew the hot side intercooler boot off the turbo where its pretty common to blow. I got through that trip with driving it easy and putting a T-bolt clamp on it. I found several people that had the same issue so I opted to upgrade and got the afe hot side intercooler pipe kit. I also realized that the sotf switch messed up some how and I was on the biggest tune while towing. (200hp) I took it back to the shop that installed everything and got the switch/ tuning issue fixed and installed the afe pipe.

Now, I just got back from the same 2200 mile trip. well, its not fixed. about 150 miles in, boom, pipe blows off turbo. The afe pipes have silicone couplers. Now the silicone coupler is melting out to the point the clamp cant hold it on. Luckily I had several 2.5-3.0 silicone couplers and replaced it a few times and just kept boost 20 psi and under and limped it through the trip.

The truck runs and drives great.

This is what I have done. I put a boost gauge on hot side of intercooler to see if there was a big pressure diff, and the most I can get is about 10 psi on spikes and it runs about 5-8 psi higher most of the time. I unplugged the egr plugs and the Throttle valve. I called several diesel shops and got nothing from most, but the ones that would offer anything told me to unplug the plugs I mentioned above, maybe bad intercooler, maybe bad turbo actuator? I never got any good hard answers on what could be causing this.

At this point I'm thinking about installing a new aftermarket intercooler and turbo (something similar the the 63mm cheetah) and seeing if it fixes it, But I hate throwing parts at a problem to just continue to have the same issues. I will have a proper EGT gauge installed because the one on my monitor cant be right because it only goes up to 700 deg pulling, and idles at around 200 deg.

Im looking for any help on what is going on here.
Id start with a functioning EGT gauge. Is 5-8lb pressure drop normal on a duramax?

__________________
16 GMC Savanna 3500 D Max
98 6.5 GM 2500HD, dynatrac pro rock 60 front, are, 4.56 gears,4 wheel disc brakes, RCV CV shafts, cross over steering with high steer, rear are, strait pipe, 37" BFG KM2's Telephone Turbo
06 Chevy Express D Max 5in MBRP, For sale
NRA Member, GOAL member
Offline   Reply With Quote Quick reply to this message
Old 03-26-2019, 08:07 AM   #3 (permalink)
Rvn4me
Diesel Champ
 
Rvn4me's Avatar
 
Join Date: Jun 2016
Posts: 1,952
iTrader Score: 0 reviews

If its just a boot problem they do make a silicon boot 3 long by 3 in diameter and is reinforced with support rings for extreme amounts of boost pressure.
You have done a pressure test for boost leaks.

Last edited by Rvn4me; 03-26-2019 at 08:10 AM.
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-26-2019, 08:58 AM   #4 (permalink)
Mic Hubble
Diesel Fanatic
 
Mic Hubble's Avatar
 
Join Date: Jul 2006
Location: Bandera, TX....
Posts: 130
iTrader Score: 0 reviews

Quote:
Originally Posted by Joey D View Post
Id start with a functioning EGT gauge. Is 5-8lb pressure drop normal on a duramax?
Im installing an egt gauge for sure.

Quote:
Originally Posted by Rvn4me View Post
If its just a boot problem they do make a silicon boot 3 long by 3 in diameter and is reinforced with support rings for extreme amounts of boost pressure.
You have done a pressure test for boost leaks.
I talked to Jason Wehrli and he suggested I do a boost leak test, and to get one of his hot side setups w/ extreme temp. rated silicone boots. I will be doing this in the next week or so.
__________________
2016 Dually
05 CCSB LT Silverado prerunner turbo desert toy
05 Silverado RST, Twin 76mm custom kit ON New Gen LSX 427 WITH TH400/GV...best of [email protected] and still has ac.....
Offline   Reply With Quote Quick reply to this message
Old 03-27-2019, 03:26 PM   #5 (permalink)
snowman22
Diesel Head
 
snowman22's Avatar
 
Join Date: Mar 2013
Location: SoCal
Posts: 700
iTrader Score: 0 reviews

Also remember the EGT probe from the factory is post turbo so readings are generally 300+ lower than manifold temps.

Changing over to better boots is never a bad thing, but I regularly run 35+ psi and have never had a boot come off.

If you haven't already, be sure to block your EGR for test. They do NOT fully seal and you will lose a small, but noticeable, amount past the EGR valve.
__________________
2015 LML GMC Denali 3500 SRW 4wd CCLB 90k Miles
Mike L Trans, FloPro 4", MBRP Down Pipe, 30" FTE Resonator, S&B Intake, Twin Kennedy Pumps, Bilstein 5100, Edge CTS2

Sold: 2003 LB7 CCLB 350K miles
Offline   Reply With Quote Quick reply to this message
Old 04-02-2019, 10:37 AM   #6 (permalink)
Oregonnovaguy
Diesel Champ
 
Oregonnovaguy's Avatar
 
Join Date: Sep 2007
Location: Southern Oregon
Posts: 1,999
iTrader Score: 0 reviews

“. Now the silicone coupler is melting out to the point the clamp cant hold it on. “

Seriously? You are actually melting the silicone coupler? That’s a lot of heat! Typically, the couplers slip off due to oil in the intake via the PCV; reroute it or put an air/oil separator on the PCV. Did you try double clamping the coupler?
__________________
"Tolerance becomes a crime when applied to evil" Thomas Mann
If you can live amid injustice without anger, you are immoral as well as unjust. -St. Thomas Aquinas
"When any nation mistrusts its citizens with guns, it is sending a clear message. It no longer trusts its citizens because such a government has evil plans." - George Washington -

2007.5 Silverado LTZ / Z-71, 4x4, Crew Cab SB, Silver Birch/ Ebony Leather, , 150k + miles, , etc. Gearbox Z, Air Lifts
Montana High Country 310RE
My Other other Car: 70 Nova SS 350, 4 speed, posi, Fathom Blue, frame-off resto, original owner!
Previous Trucks: '03 Silverado CC gasser 4x4, '99 Sierra Ext. Cab 4x4, '77 Dodge Power Wagon 4x4, '76 Datsun 620.

Read the DISCLAIMER in my garage.
Offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

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

PLEASE READ! You must check your email inbox for the confirmation link to complete registration. Please check your spam box if you do not see the email in your inbox.

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:
Insurance
Please select your insurance company (Optional)

Log-in


Thread Tools

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
Any idea how long? TiminKAF New Vehicle Information 7 10-30-2017 02:40 PM
I have a dumb idea. Question about selling axles as a package for axletechs Walkerlogistics Medium Duty Trucks 11 09-26-2017 09:30 AM
Cruise control no longer works. Any idea? mtbigskychevy 6.5L Diesel Engine 15 02-14-2016 04:14 PM
Switch's - Need to replace will my idea work? showtimextx Electrical 6 11-18-2015 04:51 PM


All times are GMT -4. The time now is 06:07 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide