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Duramax Third Generation: 2006-2007.5 (LBZ & LLY) Discuss the third generation (2006-2007.5 LBZ & LLY) of the 6.6L Duramax diesel engine & associated components. 2006 LLY engine discussion also belongs in this forum due to the similarities of the 2006 LBZ and the 2006 LLY. Engine related discussion ONLY.

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Old 06-11-2015, 04:35 PM   #1 (permalink)
NoBait-NoFish
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Head Gasket Replacement

Can anyone suggest a decent mechanic or repair shop in SoCal that has experience replacing Duramax headgaskets. I took my truck to the dealer this morning and had my suspicions confirmed after seeing the telltale signs..............Dealer quoted $15K for a new crate motor (maybe it was reconditioned I don't remember, i'm still in shock), and they said due to my trucks mileage (258K) that they wouldn't bother trying to re-build it.

I know one thing, i can't afford $15K, yet I don't have the time or tools to tackle this myself. Looking for suggestions if you know of anyone/place. I'm in San Diego, but willing to have it repaired at a reasonable cost (if that's possible) anywhere in SoCal.

Thanks for any and all help...........................

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'06 GMC 2500HD 4x4 LBZ CCSB SLT Metallic Birch
Toyo 325/17 Open Country A/T's on 17x8.5 Weld Velocities
MBRP Turbo Back 4" Exhaust
Superchips Flash Paq - Mileage Tune
6000 HID Projector Low Beams + Fogs
6" RCD Lift (6" FR- 4" R), Line-X Bedliner
Escalade Door and Tailgate Handles
305K miles
Head Gaskets, ARP Studs, Valve Job, Machined Heads Water Pump, Thermostat, Serp Belt, Tranny Cooler lines, Amsoil all around @ 258K miles - $8K
--------------------- ---------------------------
'00 2500 Silverado 4x4 CCSB LT Gasser
sold - 99 2500 Suburban LT Gasaholic
Drydocked - 23' Mako CC w/ Yamaha 225 EFI

Last edited by NoBait-NoFish; 06-11-2015 at 04:48 PM.
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Old 06-12-2015, 11:00 AM   #2 (permalink)
Kennedy
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Can't help you with the local shop, but what I can say is that if it has been treated right you should be fine with a properly done head gasket job. Odds are the valves and guides are in perfect working order as well although a shop may try to sell you on a complete valve job. Just check the pistons for signs of heat stress and erosion and adjust the valves of course.

Studs mandatory IMHO and we do NOT use the GM LML style gaskets for anything. Skim cut the head surface and good to go.

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Last edited by Kennedy; 06-12-2015 at 11:01 AM.
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Old 06-12-2015, 08:48 PM   #3 (permalink)
TLAW
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Replace it???!!!! Bull Crap!!! You have a great engine, find a good shop and cut that cost in half. Did mine about 3 years ago and with studs and a new drivers side exhaust manifold ran me around $7,500 which I know is high but was done by a very reputable diesel shop in Langley BC. Then again, if converted out Canadian dollar to yours it would be around $5,000!!!!
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Old 06-17-2015, 04:04 AM   #4 (permalink)
Duraclaker
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Lol @ $15k for a stock replacement.

You could build a nearly bullet proof street engine or halfway decent mid-level pulling engine for $15k.

Head gasket jobs should be a $5k job if there is no other major engine failure like cracked pistons ect.

If I had to do head gaskets on my truck I'd just do it myself. Between my friend and I we could figure it out and save a **** ton of money. That's including buying a $500 beater to putt-putt around town in.
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Old 10-12-2015, 07:39 PM   #5 (permalink)
NoBait-NoFish
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Well its been 4 months with my truck sidelined. Partly procrastination on my part but most of the shops I talked to about repairs weren't interested due to the high mileage of the motor (258K). One shop offered to try and locate a decent salvage motor in SoCal but pickins were few and far between and when one did turn up they tended to be high mileage as well 180K +).

Same shop which has been in business for 40+ years very reluctant to recommend spending $5K on a head gasket job due to the mileage factor and the possibility that something else my break as a result higher compression due to head gasket replacement.

I see Kennedy suggests skim cutting the head surface and not replacing gaskets, anybody else have experience with this technique? I don't want to be telling the shop that will be doing the work how to do their job, but if this is a better method than the standard replace the gaskets method, I'm all for it.

Any recommendations on stud replacements, and how much more might that add to overall repair costs?

Any responses appreciated. From some of the stories I read here about the 2015 Duramax's, there's no way I'm gonna go drop that amount of coin again.

__________________
'06 GMC 2500HD 4x4 LBZ CCSB SLT Metallic Birch
Toyo 325/17 Open Country A/T's on 17x8.5 Weld Velocities
MBRP Turbo Back 4" Exhaust
Superchips Flash Paq - Mileage Tune
6000 HID Projector Low Beams + Fogs
6" RCD Lift (6" FR- 4" R), Line-X Bedliner
Escalade Door and Tailgate Handles
305K miles
Head Gaskets, ARP Studs, Valve Job, Machined Heads Water Pump, Thermostat, Serp Belt, Tranny Cooler lines, Amsoil all around @ 258K miles - $8K
--------------------- ---------------------------
'00 2500 Silverado 4x4 CCSB LT Gasser
sold - 99 2500 Suburban LT Gasaholic
Drydocked - 23' Mako CC w/ Yamaha 225 EFI
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Old 10-12-2015, 09:08 PM   #6 (permalink)
steakman
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WHAT F***ing MILEAGE FACTOR...???

Whoever is telling you that 258K MILES is High mileage...doesn't know SHYTE from shinola.!!
Man oh man this type of arrogant moronic chirping by 2bit gas engine so called "mechanics" simply makes me MAD.
Sounds like you are dealing with ignorant CROOKS trying to SCREW you out of your money.

DO NOT listen to fools who know nadda about Duramax motors..that motor is just barely broke in. I just had mine done at 275,000 MILES and have absolutely ZERO concerns while fully expecting this engine to go 750,000 miles...

Take care of it - Filter the daylights our of your fuel - add a good lift pump - filter the daylights out of your oil and run Transynd in the Ally. Do that.? ..and HG's aside, you are easily good for 500,000 miles if not many more.

PERIOD.

HG's from what I hear from guys in the US shouldn't cost you more than 5500 max..?
And for what its worth: For 10,965 Canadian ... I received ARP Studs, New HG's, PPE Exhaust Manifolds and up pipes, 3" MBRP Down pipe, EGR Delete and a Sinister intake installed along with EFI Live adjusted tuning.

I plan on NEVER Buying another vehicle...nothing will beat what i have now....nothing.

Theo
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Last edited by steakman; 10-12-2015 at 09:23 PM.
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Old 10-12-2015, 09:24 PM   #7 (permalink)
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Quote:
Originally Posted by NoBait-NoFish View Post


I see Kennedy suggests skim cutting the head surface and not replacing gaskets, anybody else have experience with this technique?


I do not think Mr. Kennedy was saying not to replace the gasket, I think he is saying use a different type of gasket, not the LML style. Maybe he will see this and clarify.
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Old 10-13-2015, 10:54 AM   #8 (permalink)
IGO1320
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Duramax engine has a dramatically heavier duty block and distortion from torquing and un-torquing heads is not a big deal like a gasfired motor.
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Old 10-13-2015, 12:24 PM   #9 (permalink)
aprr454
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Quote:
Originally Posted by NoBait-NoFish View Post
Well its been 4 months with my truck sidelined. Partly procrastination on my part but most of the shops I talked to about repairs weren't interested due to the high mileage of the motor (258K). One shop offered to try and locate a decent salvage motor in SoCal but pickins were few and far between and when one did turn up they tended to be high mileage as well 180K +).

Same shop which has been in business for 40+ years very reluctant to recommend spending $5K on a head gasket job due to the mileage factor and the possibility that something else my break as a result higher compression due to head gasket replacement.

I see Kennedy suggests skim cutting the head surface and not replacing gaskets, anybody else have experience with this technique? I don't want to be telling the shop that will be doing the work how to do their job, but if this is a better method than the standard replace the gaskets method, I'm all for it.

Any recommendations on stud replacements, and how much more might that add to overall repair costs?

Any responses appreciated. From some of the stories I read here about the 2015 Duramax's, there's no way I'm gonna go drop that amount of coin again.

Just for what it's worth....

My brother-in-law blew his HGs on his '05 a couple of winters ago and I changed them out for him. I first got a quote from three shops, 2 dealers and 1 independent. All 3 said $5k. All 3 said they bill for 30hr labor. That was JUST for the HGs and stock head bolts.

We changed the fuel pressure regulator, water pump, all the glow plugs (looking back I wouldn't replace them until they go out), replaced stock down pipe with a 3" down pipe, installed ARP studs, and took the heads to the machine shop for cleaning and inspection. All said and done: $2400. It took about 40hrs.
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Old 10-13-2015, 08:58 PM   #10 (permalink)
kleimanr
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If you can't do it yourself you should contact Bud's Diesel Shop in Orange County
http://www.budsdiesel.com/our-work/

Bud has helped my son with his Ford and all work is first class. I will be taking my LBZ to Bud's for downpipe and other stuff soon.


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