How to tell if your Duramax Diesel Turbo is gone?
If you can’t find the appropriate fitting, check boost at one of the vacuum ports. With the gauge connected, open the throttle and check the peak boost. All models should check in at 20 psi of boost maximum, with the rpm at about 1,800 for 2003 to 2004 LB7 motors and 1,600 for all others.
When did the Duramax V-8 diesel engine come out?
Introduced in 2001 as a joint venture between GM and Isuzu, the Duramax V-8 was the General’s bid to one-up Ford and Chrysler’s newest generation of powerful and efficient diesels. This move was not voluntary on GM’s part, as competitor Chrysler had just purchased their previous engine supplier, Detroit Diesel.
How many horsepower does a GM Duramax have?
GM was eager to develop and speed to market the 6.6-liter LB7 Duramax, which produced 235 horsepower. Later versions including the LLY, LBZ, LMM and LML would use more sophisticated turbos and engine controls, ultimately increasing both horsepower and torque by about 80 percent from 2001 to 2011.
How does a variable geometry turbo work on a Duramax?
Instead of a wastegate, variable-geometry turbos use variable-pitch vanes to modulate turbo boost. The vanes are close together at low rpm, increasing exhaust gas velocity and helping the turbo to spool up faster. An actuator pushes the vanes open at high rpm for maximum flow.
If you can’t find the appropriate fitting, check boost at one of the vacuum ports. With the gauge connected, open the throttle and check the peak boost. All models should check in at 20 psi of boost maximum, with the rpm at about 1,800 for 2003 to 2004 LB7 motors and 1,600 for all others.
How to repair a LB7 6.6 Duramax engine?
We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.
Are there any problems with the Duramax engine?
The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants. Not specific to one version of Duramax in particular (ex: LB7, LLY, LBZ, LMM or LML), the problem exists across all generations.
What causes the crankshaft on a Duramax to crack?
Or how about the fact that the rods in the LB7 and LLY engines can bend with added power and the LBZ and LMM mills are notorious for cracking pistons? Discover the worst failure point (s) of your Duramax in the article that follows, along with how to address it. 1. Snapped Crankshaft
How much torque does a 6.6 Duramax have?
From what I can gather from diesel forums, the factory 6.6 Duramax internals can hold up to about 550rwhp, or 1000 lb-ft of torque at the tire. Thats plenty enough for basically anything you want to do.
We carry a full line of repair and performance parts for these engines that we install in our shop on a regular basis. Odds are we have run across your problem before and would be glad to help. Call us at 1-877-367-9351.
When did the 6.6 Duramax Diesel come out?
Granted diesels back then kind of sucked, but none the less they have been doing it for quite some time. In 2001 they introduced their all new 6.6 Duramax, which was built with the help of Isuzu. Since then they have continued to modify the 6.6 Duramax to suit the current needs.
When did the Duramax 6.6L turbo diesel come out?
The Duramax 6.6L V8 turbo-diesel engine is nearing its 20th year of production, after debuting in 2001. Over the engine’s lifespan it has gone through 6 different engine variations: LB7, LLY, LBZ, LMM, LML, and L5P.
What kind of engine does a Duramax have?
GM 6.6L Turbo Diesel V8 Duramax LGH Engine Specs Type: 6.6L V8 Turbo Diesel Engine Duramax Displacement: 6.6L (403 ci) Engine Orientation: Longitudinal Compression ratio: 16.0:1 Valve configuration: OHV
What happens if the crankshaft on a Duramax goes bad?
Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet.
What happens if you have a problem with the Turbo?
If this occurs, the build-up of debris can cause compressor wheel abrasion or damage the turbine blades, diminishing the performance of the turbo. Cracks or faulty seals between the engine and the compressor mean that the turbocharger has to put much more effort into building pressure and forcing air into the engine.
Why does my Duramax DMAX throttle response not work?
When it is cold outside, the Dmax isn’t much of a performer until it gets up to operating temps (which could take 10 miles or so). If the fuel filter has never been changed, then it is likely due to be done.
Instead of a wastegate, variable-geometry turbos use variable-pitch vanes to modulate turbo boost. The vanes are close together at low rpm, increasing exhaust gas velocity and helping the turbo to spool up faster. An actuator pushes the vanes open at high rpm for maximum flow.