The LB7 was the simplest in terms of emissions controls, while the LLY came with the largest turbocharger ever offered. The LBZ packed a host of improvements, including considerably more power, and the LMM was nearly a mirror image of it aside from its use of a diesel particulate filter.
What is the difference between the LB7 LLY or LBZ?
The LBZ Duramax V-8 engine is more powerful than the LB7 and LLY with its 605 lb. ft torque at 1600 rpm and 310 bhp at 3000 rpm. LLY has two variants; one with a power output of 310 bhp at 3000 rpm and another 250 bhp at 3200 rpm. LB7 comes with a power output of 300 bhp at 3200 rpm.
Is a LLY Duramax any good?
Similar to the LB7, the LLY Duramax is reliable, powerful, and lacks most of the emissions found on modern day diesel trucks like the L5P. LLY Duramax trucks don’t suffer from the same injector failure problems that LB7 trucks frequently had. Instead, many LLY Duramax problems stem from overheating.
How do I know if I have an LLY or LBZ?
The Duramax engine has evolved from the original LB7 series to include the LLY, LBZ, LMM, LML/LGH, and now the L5P series. The simplest way to verify which series Duramax you have is interpreting the VIN# of the truck. With some exceptions, the 8th digit is the engine ID and it will either be a 1, 2, D, 6, 8, L, or Y.
Is the lly better than the LB7? – Related Questions
What is so special about the LBZ Duramax?
The GM 6.6L Duramax engine was completely redesigned to enhance overall performance and reliability for 2006. The LBZ engine tuning resulted in a significant increase in horsepower and torque, with the power levels getting a bump to 360 hp and 650 lb-ft of torque, up from 310 hp and 605 lb-ft of torque in the LLY.
What’s the best year of LLY Duramax?
Some engines are more popular than others. For example, the pre-emissions Duramax engines made between 2001 and 2007 are highly sought-after for superior reliability.
What digit is engine code for LBZ on Vin?
How do I know what LBZ engine I have?
The ‘LBZ’ engine (2006 – 2007) is identified with the connector key as above. You can also check the 8th digit of the V.I.N. to confirm it is a ‘D’.
What years are LBZ?
LBZ Duramax Specifications
| Manufactured Years: |
2006-2007 |
| Displacement: |
6.6 Liters or 403 Cubic Inches |
| Engine Weight: |
835 Lbs |
| Bore: |
4.055″ or 103 mm |
| Stroke: |
3.897″ or 99 mm |
What year is a lly?
2004.5-2005 GM 6.6L Duramax LLY Specifications
| Production Years: |
2004.5, 2005 |
| Cylinder Heads: |
Aluminum |
| Engine Block: |
Cast Iron |
| Firing Order: |
1-2-7-8-4-5-6-3 |
| Compression Ratio: |
17.5 : 1 |
How much HP can an LLY make?
It’s not uncommon to find a slight bend in most (if not all) connecting rods upon teardown of an LLY powered truck churning out 550 to 600-rwhp. Good tuning and a large single turbo setup can be your best friend if you’re trying to make big power on a stock bottom-end Duramax.
How much HP does a lly have?
The 6.6 liter LLY Duramax V8 engine was introduced during the 2004 model year as a replacement to the LB7 Duramax V8. As such, it powered Chevrolet Silverado Heavy-Duty and GMC Sierra Heavy-Duty pickup trucks through 2006, making up to 310 horsepower and 605 pound-feet of torque.
How many miles will a LLY Duramax engine last?
A poorly-maintained engine can quickly fall into disrepair before it even reaches the 100,000-mile mark while a well-maintained Duramax pickup truck should last 400,000 or even 500,000 miles.
How do you get 30 mpg on a LLY Duramax?
It may be possible to upgrade some of your diesel truck parts for better performance and fuel economy. Let’s take a look at how to get 30+ MPG with a Duramax.
Some popular methods include:
- Tuning.
- Removing the tailgate.
- Installing a bed cover.
- Not using your AC.
- Upgrading your air intake.
- Installing a new fuel filter.
What year Duramax has head gasket problems?
The 2006-2010 riveted gaskets are the only ones that don’t follow this pattern, because they do leak externally when they fail and rarely cause this over-pressurization. However, these will often have coolant puddles on the ground when the truck is parked overnight, making it easy to see that there is an issue.
When did they stop making LLY Duramax?
LLY. The LLY (internally called the 8GF1) (engine code “2”) is a 6.6 L; 403.9 cu in (6,619 cc) turbocharged engine which debuted in mid-2004 and continued until the end of 2005. It is a 32-valve design with high-pressure common-rail direct injection and aluminum cylinder heads.
Why does the LLY Duramax overheat?
What is this? Despite these issues, a majority of LLY Duramax overheating is actually caused by other common LLY Duramax problems. Blown head gaskets, water pump failure, fan clutch failure, and even a dirty or clogged radiator can be the root cause of your overheating issues.
Does the lly have a CP3?
The LLY Sportzman is built out of a brand new LBZ based CP3 pump. It is internally modified to support high rpm applications while delivering maximum fuel flow with out modifying the cam. This pump supports 650hp depending on injector size and health.
Does LLY have glow plugs?
A: The LLY glow plugs are 4.7vdc that I use for the 2004.5. These have worked perfectly fro…
What problems do LLY Duramaxs have?
As for the Duramax LLY engine fitted in the 2004 – 2005 Chevrolet Silverado, Hummer H1, and GMC Sierra HD, the most common problems that owners experience include overheating when towing and blown head gaskets. The LBZ is perhaps one of the most desired Duramax engines.