Does a Duramax have a wastegate?
The Duramax does not have or need a wastegate. Boost is controled by the ECM by minipulating the vanes on the turbine side of the turbo. It is much more efficient than a one size fits all turbo with a waste gate.
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.
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.
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.
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.
When do you need to replace the turbo on a Duramax?
There may come a time in your Duramax trucks lifetime that you may need to either replace the turbocharger or upgrade the turbocharger.
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.
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.
What makes a GM Duramax Turbo spool faster?
The lighter wheel means this turbo will spool faster and will out-flow the stock turbocharger. This all-new turbo was engineered as a direct-fit replacement for a quick and simple installation with no tuning required.