Duramax LLY - Diesel Bombers



 
 
 
 
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  #1  
Old 05-01-2008, 12:22 PM
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Default Duramax LLY

The LLY (internally called the 8GF1) is a 6.6 L (6599 cc) turbocharged engine which debuted in 2004 in GM trucks. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads. Output is 310 hp (231 kW) at 3100 rpm and 605 lbft (820 Nm) at just 1800 rpm. The engine was released with a new Garrett turbocharger with a variable geometry vane system. The valve covers were scalloped to allow access to the injectors without having to remove the valve covers, saving significant labor costs if injector replacement became necessary, and preventing leaked fuel from entering the crankcase, causing oil dilution.
The following trucks used the LLY engine:
  • 2006 Hummer H1 Alpha
Specifications
  • Engine Code: LLY
  • Displacement: 6.6L / 403 in
  • Bore x Stroke: 4.06 in (103 mm) x 3.90 in (99 mm)
  • Block / Head: Cast gray iron / Cast aluminum
  • Aspiration: Turbocharged & Intercooled
  • Valvetrain: OHV 4-V
  • Compression: 17.5:1
  • Injection: Direct; Bosch High Pressure Common-rail
  • Power / Torque: 310 hp (231 kW) @ 3,000 rpm / 605 lbft (820 Nm) @ 1,800 rpm
  #2  
Old 05-01-2008, 02:24 PM
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Who do you know if you have an LB7 or an LLY??
  #3  
Old 05-01-2008, 02:36 PM
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Quote:
Originally Posted by Rttoys View Post
Who do you know if you have an LB7 or an LLY??
I know that you have an LLY and Danny has an LB7.
  #4  
Old 05-01-2008, 02:37 PM
Aaron
 
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But to answer your question.


8th number of VIN:
F= HO 6.5
S= Emissions motor
1 = LB7
2 = LLY
D = LBZ

Last edited by TCU Fan; 05-01-2008 at 02:43 PM.
  #5  
Old 05-01-2008, 02:39 PM
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NO NO No..... If it need injectors, it's an LB7. If it overheats, it's an LLY


Reeled you in on that one.
  #6  
Old 05-01-2008, 02:42 PM
Aaron
 
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Not all LLY's overheat. Mine never did. I also think that you found a cure for yours.

I also never had injector problems on my LB7, however Skipp and other have had plenty.

  #7  
Old 05-01-2008, 02:42 PM
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so whats the question?


i do want to get my hands on the full-time t-case that is on the back of the allision out of those H1 Alpha
  #8  
Old 05-01-2008, 02:44 PM
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Quote:
Originally Posted by noproblem View Post
Not all LLY's overheat. Mine never did. I also think that you found a cure for yours.


That's what they all say.

And yes I have the cure.
  #9  
Old 05-01-2008, 06:18 PM
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i can tell you mine has never over heated and you can see the loads i have pulled
  #10  
Old 05-09-2008, 08:55 PM
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Don't get them started... Tx will break out the OHing voodoo dolls.
 
 
 

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