How bad is the head gasket issue with the lly? - Diesel Place : Chevrolet and GMC Diesel Truck Forums
 
Home Forum Market Place Garage Lounge (0) Tuning Library DTC Tool Register Vendors
Go Back   Diesel Place : Chevrolet and GMC Diesel Truck Forums > GM Diesel Engines > Duramax Second Generation: 2004.5-2005 (LLY)
Register FAQ Forum Rules My Replies My Threads Mark Forums Read Auto EscrowAuto LoansInsurance

DieselPlace.com is the premier Duramax Diesel Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 06-06-2011, 02:17 PM   #1 (permalink)
jeff3000
Diesel Enthusiast
 
Join Date: Oct 2007
Posts: 9
iTrader Score: 0 reviews

How bad is the head gasket issue with the lly?

My 01 lb7 ext cab is down with injectors leaking fuel in the oil. Also had a slight head gasket leak for the past 2 years.

As there is many other issues with that pick up (rust, transfer case starting to leak and others), I am not to willing to spent $$$ to get it back on the road.

Would like to start fresh and get a crew cab but not sure to go with another
lb7 or an lly. Can't afford anything newer than 2005.

Also planning on getting a suncoast 4 and running at 400 hp with efi live but
will not be racing it.


So the question is; Are the head gasket issues on lly worse than other models?
Are they as bad as the injectors problem on the lb7?

I know about the overheating issues but will not be towing heavy and know
threre is a fix for it(V2).

Also, is there a way to test for head gasket leak upon inspection before buying the pick up?
Offline  
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 06-06-2011, 04:48 PM   #2 (permalink)
PureHybrid
Diesel Specialist
 
PureHybrid's Avatar
 
Join Date: Dec 2005
Posts: 560
iTrader Score: 0 reviews

Buckeye Oil Burners Member

Head gasket issues are more common with the LLY but still not bad if your not pushing big power. Injectors are better, most problems are with the injector wiring harness. Most overheating problems can be cured with an LBZ mp upgrade and an EGR blocker.
__________________
FOR SALE: 2004 GMC ECSB LLY | PPE Stg.IV | SC1056 | Profab DP | Recon tails | 285/60/18 Cooper Zeons on Eagle 064's | PCV re-route | Kennedy Pumps/Pickup | Profab EGR delete for offroad | Nicktane | LBZ mp | Phantom II boost/pyro | Keylock DSP5 | Tuned by Mark @ Danville, 531hp/944tq on 12-1-11 | 206k Miles

BROTHERHOOD OF HANDSHAKERS CLUB #118

www.AlligatorPerformance.com
Offline   Reply With Quote Quick reply to this message
Old 06-06-2011, 10:07 PM   #3 (permalink)
Lo-Buk
Diesel Master
 
Lo-Buk's Avatar
 
Join Date: Jan 2011
Location: On the island, NY
Posts: 1,333
iTrader Score: 0 reviews

yup. i think alot of the blown gaskets were from trucks that were overheaters with big loads, big hills and high ambient temps. (i hope my theory is right).
__________________

UWUA AFL-CIO Local 1-2

'liLLY' 05 duramax 2500 CCSB 4X4-235,000 miles
Grade C's, ARP head studs, PPE Standard, Edge insight cts w/ EGT probe, Silverline 4" straight pipe (LOVE IT), 265 transforce, Bilstein 5100s , pcv rerouted, egr blocked, unplugged & bypassed, kitty delete, AFE turbo inlet, Reese wd/ anti sway hitch (cam style with trunion bars) and a bunch of little stuff.

28' haulmark race trailer
20' mgs tilt bed open trailer
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 01:13 AM   #4 (permalink)
jeff3000
Diesel Enthusiast
 
Join Date: Oct 2007
Posts: 9
iTrader Score: 0 reviews

So the head gasket issues on the LLY's are probably related to their
overheating problem.

Is there any kind of test I can do on a pick up I want to buy prior
of purchasing it to make sure the head gaskets are not leaking?
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 01:18 AM   #5 (permalink)
woodtic
Diesel Technician
 
Join Date: Feb 2011
Location: Blackduck, MN
Posts: 204
iTrader Score: 0 reviews

Check the upper radiator hose when cold. If it's hard, it could indicate a head gasket problem. Also have a good look at the fluid in the expansion tank.
__________________
2005 Silverado 2500HD CCSB 4X4 LT.
Bought on 1/30/11 w/137,000 mi. 184,000 mi. on 1/24/2014
EFI Live by Duramaxtuner
Edge Insight CS
Hayes G2 Brake control
PCV re-route
DIY CAI
AFE Turbo MP
EGR blocked
PPE race valve
Transynd
Hellwig Load Pro spings
Reese R16 hitch

2011 Montana 3615RE 38' 9". 12,250# dry.
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 05:44 AM   #6 (permalink)
Lo-Buk
Diesel Master
 
Lo-Buk's Avatar
 
Join Date: Jan 2011
Location: On the island, NY
Posts: 1,333
iTrader Score: 0 reviews

Iirc there is an updated gasket and if you do them, use head studs.
__________________

UWUA AFL-CIO Local 1-2

'liLLY' 05 duramax 2500 CCSB 4X4-235,000 miles
Grade C's, ARP head studs, PPE Standard, Edge insight cts w/ EGT probe, Silverline 4" straight pipe (LOVE IT), 265 transforce, Bilstein 5100s , pcv rerouted, egr blocked, unplugged & bypassed, kitty delete, AFE turbo inlet, Reese wd/ anti sway hitch (cam style with trunion bars) and a bunch of little stuff.

28' haulmark race trailer
20' mgs tilt bed open trailer
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 07:31 AM   #7 (permalink)
blkdmax05
Lead Moderator
BlakeMan
 
blkdmax05's Avatar
 
Join Date: May 2010
Location: Kent Co. Delaware
Posts: 9,122
iTrader Score: 2 reviews

DelMarVa Diesel Club Member

DieselPlace.com Lifetime Premium Member

The head gasket issue with the LLY is mainly linked to overheating engines and owners running hot tunes with too much boost. Kinda like the problem the LBZ's have with cracking pistons running hot tunes. The LBZ mouthpiece and EGR blocker are not true fixes for chronic over heaters, the aux radiator is. The V2 is no longer available, TxC no longer sells them. Checking for a bad head gasket is tough, squeezing the upper radiator hose is a start. On some occasions you will also get little specs of black in the expansion tank from the leaking cylinder(s). You might want to read some of the LLY FAQ info we have stickied at the top of the LLY section, that will tell you a lot about what to look for, what to test, and what to stay away from.
__________________
Blake
>2005 Chevrolet 2500HD Crewcab Shortbox 4X4 Duramax LLY/Allison<
Black, LT Trim, Gray Heated Leather, Sunroof, XM Bose Radio, Automatic Climate Controls
Full MBRP 4" Exhaust w/6" Tip, MBRP Downpipe, EGR Blocked (FE9 Emissions), PCV Rerouted, Resonator Blocked, AFE Mouthpiece, Edge CTS Insight, Banks Intake w/Scoop, Nicktane Filter Adaptor w/CAT 1R-0750 Filter, Bilstein 5100's, 2006+ Towing Mirrors, GM Tubular Chrome Step Bars, GM Bug Guard and Window Shields, Spray in Bedliner, Dually Rear Light Bar, 265/75R16 Goodyear Silent Armors on stock rims, Superglide 16k Fifth Wheel Hitch, Tekonsha P3 Trailer Brake Control

>2011 Honda CR-V EX-L<
Opal Sage, Tan Heated Leather, Factory Navigation

>2012 Kubota BX1860 Tractor<
LA203 Front Loader, 54" Mid-Mount Mower, 18HP 3 Cylinder Diesel

Help The Staff!
See an inappropriate post, or spam? Need help with a thread? Please report it by clicking on the button!
Online   Reply With Quote Quick reply to this message
Old 06-07-2011, 10:15 AM   #8 (permalink)
Turbobruce
Diesel Master
 
Join Date: Jul 2005
Location: Socal
Posts: 1,194
iTrader Score: 1 reviews

It was a poorly designed gasket that will fail at some point if you plan on running any kind of a tune. Even stock trucks are blowing gaskets as well. There is a reason GM redesigned it in 06 along with other things. I think it is a question of when will it happen vs if it will happen. I'm not looking forward to it at all.
__________________
05 CC 2wd Duramax. 4 inch lift spindles with 2 inch blocks,295/75/16 BFGs,MBRP 4" cat back. V2 w/fan. TX CAI, LBZ MP,AAM 4.11 gears in the back. Tuned by Danville Performance!

Last edited by Turbobruce; 06-07-2011 at 10:16 AM.
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 11:05 AM   #9 (permalink)
Lo-Buk
Diesel Master
 
Lo-Buk's Avatar
 
Join Date: Jan 2011
Location: On the island, NY
Posts: 1,333
iTrader Score: 0 reviews

Me either. But when the time comes, studs will be a must. Then I'll start tuning it for more power.
__________________

UWUA AFL-CIO Local 1-2

'liLLY' 05 duramax 2500 CCSB 4X4-235,000 miles
Grade C's, ARP head studs, PPE Standard, Edge insight cts w/ EGT probe, Silverline 4" straight pipe (LOVE IT), 265 transforce, Bilstein 5100s , pcv rerouted, egr blocked, unplugged & bypassed, kitty delete, AFE turbo inlet, Reese wd/ anti sway hitch (cam style with trunion bars) and a bunch of little stuff.

28' haulmark race trailer
20' mgs tilt bed open trailer
Offline   Reply With Quote Quick reply to this message
Old 06-07-2011, 12:33 PM   #10 (permalink)
Diesel Wanna Be
Supporting Vendor
 
Diesel Wanna Be's Avatar
 
Join Date: Jul 2010
Location: St. Louis Metro
Posts: 3,154
iTrader Score: 0 reviews

Illinois Diesel Power (IDP) Member

Midwest Smokers Member

LBZ MP increases turbo efficiency. It has nothing to do with over heating.

Mark B @ Danville refused to give me more than 33 PSI of boost with my tunes. He said 35psi was his known threshold for popping head gaskets on a stock motor.

As has already been noted, some trucks will pop the gaskets with even stock boost.
__________________
2005 D-max w/5-Speed Ally 2WD Chevy Silverado 2500HD, CC/SB LS
- EGR Blocker Plate & PCV Re-Route
- 2" Drop Shackles
- Aluminum Fuel Filter Bleeder Screw
- Kool Vue Extendable Towing Mirrors (Leveled)
- 20" Wheels w/275/55/20 XL Hancook Ventus AS tires
- Auto Meter Phantom 45 PSI Boost & EGT Gauge
- Carter 4601HP 100GPH @ 18PSI Lift Pump w/Quick Fuel Regulator @ 10.5PSI, Napa 4770/3528 Base/Filter
- MBRP 4" Exhaust w/All Season Diesel Performance 3" Down Pipe - Kitty Died
- LBZ Turbo Mouthpiece
- 5DSP EFI Live by Danville Performance (338/392/417/498 & 338 w/Lope HP Tunes) w/Edge Insight CTS
- 20.1 MPG @ 392 HP @ 70 MPH - 16.8 MPG City @ 392 HP (Hand Calculated)
- Pioneer AVH-P3400BH through Bose Amp/Speakers
- Bilstein Shocks 24-186735 & 24-186742 (5100s)


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:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



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
HELP!!How do you check a head gasket issue on a lly Heynow2203 Duramax Second Generation: 2004.5-2005 (LLY) 15 11-06-2011 05:15 PM
Head/gasket issue? ultimatpredator Duramax First Generation: 2001-2004 (LB7) 5 11-22-2010 10:36 AM
Head Gasket? or other issue? CHEVY052500HD Duramax Second Generation: 2004.5-2005 (LLY) 8 07-28-2009 01:46 AM
6.5 head Gasket issue amccom 6.5L Diesel Engine 1 07-29-2007 11:33 AM
head gasket issue sirk798 6.2L Diesel Engine 4 06-17-2007 03:54 PM


All times are GMT -4. The time now is 08:11 AM.


Shoutbox provided by vBShout v6.2.1 (Lite) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
© AutoGuide

SEO by vBSEO 3.6.0