Quick knowing of Cummins  VGT Actuator 

VGT (known as variable geometry turbocharger)  Actuator works by adjust the vanes angle to allow more or less 

exhaust air turning the turbine shaft wheel, and finally increasing or decreasing Turbocharger Boosting Power 

according to Engine Working Conditions.

1. What is a VGT actuator ?

2. How VGT actuator Works ?

3. What are the benefits of VGT Turbo ?

4. How to know if my VGT actuator is bad?

5. Is it safe to drive my car with a bad turbo VGT actuator ?

6. Is it OK to drive with a bad turbo VGT actuator?

7. How to test Holset VGT actuator?

8. How much to pay for a new VGT Actuator ?

9. How to replace a VGT actuator ?

10. Do you need to Calibrate your VGT Actuator ?

11. What kind of calibration tool to choose for my VGT Actuator ?

12. How to calibrate my HE300VG Cummins VGT Actuator ?

13. How the VGT Actuator Calibration Tool works ?

14. How to Maintain your VGT Turbocharger ?

15. Delsonpower VGT Actuator Availability.

1. What is a VGT actuator ?

VGT (known as variable geometry turbocharger)  Actuator works by adjust the vanes angle to alow more or less exhaust 

air turning the turbine shaft wheel, and finally increasing or decreasing Turbocharger Boosting Power according to

 Engine Working Conditions.

2. How VGT actuator works ?

VGT Actuator is able to adjust the air flow of engine exhaust energy across turbine shaft wheel system, thus control the 

turbocharger to provide certain boost power the engine needed at different working conditions. When vehicles at lower

Revolutions Per Minute (RPM), the engine needs less boost  thus the VGT control by allowing less exhaust gasses across

turbine wheel. When at higher RPM, VGT Actuator allow more exhaust energy into turbocharger system to engine for a

boost improvement.

Simply, VGT actuator works based on the signal received from ECU, increases or decreases boost according to how much 

the engine of various condition needs.

3. What are the benefits of VGT Turbo ?

1. Balance the air fuel ratio, full burning of fuel

2. Reduce turbo lag at lower RPM

3. Significant increase of boost pressure and a broader torque curve

4. Accurate control airflow and provide sufficient boost

5. Work with Electronic Actuator, more accurate air flow

6. Improve fuel economy, reduce engine emissions

4. How to know if my VGT actuator is bad?

Symptoms of Bad Vgt Actuator

There are below some common symptoms that your turbo fails:

OVER BOOST | LOWER BOOST | INTERMITTENT LOW PRESSURE | FAULT CODES | ECU ERROR SYMPTOMS CONTROL | NOISE FROM TURB-OCHARGER | A FLASHING ENGINE MANAGEMENT LIGHT | COMPLETE LOSS OF POWER CAUSING THE VEHICLE TO ENTER LIMP MODE.

5. Is it safe to drive my car with a bad turbo VGT actuator ?

Yes, you can drive your car if your VGT Turbo went wrong. But the thing is that will affect your engine serving life.

Unless you have to drive, you need to check out any turbo failure symptoms and find the failure causes asap from a know-how technician.

6. Is it OK to drive with a bad turbo VGT actuator?

That's fine to drive, but you'd better know no obvious mechanical thing went wrong.

7.How to test Holset VGT actuator?

Firstly,you need a Hoselt E-tool,which allow technician to perform funcional test on the VGT Actuator. The device could identify faults both from the VGT Actuator and turbocharger VGT mechanism itself.

8. How much to pay for a new VGT Actuator ?

Instinct consideration is Cummins Original, which is the first option.

The Cummins Reman pricing starts above USD 600, and brand new starts with over USD 850.00.

However, you may have an addtional option. Delsonpower VGT Actuator, dropshipping price USD 500.00 only.

How about  Delsonpower Version Upgrade VGT Actuator Kit ?

• Besides its good price, it will come with 2 years' non limited milage warranty, 

• Complete install kits included. 

• And the Adaptor Cable will allow the turbo actuator to be used across the early and late model years.

• Moreover, our new calibration tool provided at unparalleled pirce only USD 50.00.

• 2 mintues' easy operation refreshing your VGT actuator and turbocharger.

9. How to replace a VGT actuator ?

Below operations all should be by Expert Technician.

1.Actuator Pre-Installation

1.1  Prior to installing an actuator onto a turbocharger, it is necessary to assure that actuator drive gear is in the 

       correct position to mesh withthe pre-aligned turbocharger sector gear. The pre-installation process should 

      be conducted electronically.

1.2  When pre-alignment electrical command is initiated, actuator drive gear will move to it's correct rotational pre-position.

1.3 Pre-position turbocharger sector gear by rotating it to location that will allow setting pin to pass through the hole in the 

     gear and engage  in reference hole in bearing housing

2.Actuator Installation

2.1 Once actuator drive gear and turbocharger sector gear have been properly pre-positioned, actuator can be mounted to 

     turbocharger. Open grease tube supplied with service kit. Apply grease evenly across all teeth of sector gear.

2.2 Hold pre-aligned actuator with fitting face vertical. Insert two of four capscrews in diagonal locations. Position gasket on two

     screws using profiled locations to hold gasket in place

2.3 Align actuator and gasket assembly with bearing housing face and engage two screws into bearing housing threads. Insert

     two additional fasteners.

10. Do you need to Calibrate your VGT Actuator ?

It's highly important to know that most electronically controlled VGT actuators needs calibration to be done once removed or 

replaced. Because the calibration of these actuators is especially for the actuator to decide the range of movement that opens 

and closes the vanes of a turbocharger, thus could move the vanes to the right position when the ECM sends commands.

If calibration not carried out,  it would be hard for the ECM and VGT actuator to position the vanes to optimize air flow to the 

engine and would cause performance issues and possibly premature failure of other components.

Take example, it's possible for VGT actuator Turbocharger to create much more boost when low speed engine and too smaller

boost at high speed engine. These will cause high exhausting manifold pressure and change the air and fuel ratio drastically, 

causing  no sufficient power for the engine.

11. What kind of calibration tool to choose for my VGT Actuator ?

As you already know the importance of calibration for your VGT actuator after being installed. And you may try to locate a tool to 

set the calibration for your VGT actuator.

Take VGT Actuator for HE300VG Dodge Cummins 6.7 for example, that may go for over $2500, or you may heard there are 

some good ones for around $500 or less.

When you sort out which cheapest one with FEATURES you only need for the calibration function?

Please check this link,  the cheaper VGT Actuator and Calibration Tool ( get calibration done at 2 minutes).

For the operation of Delsonpower Calibration Tool, please see below.

12. How to calibrate my HE300VG Cummins VGT Actuator ?

6.7 cummins VGT Actuator Calibration     Cummins isb vgt actuator replacement

Condition 1: Actuator had been removed from turbo

Calibration Step:   Press IP Key->Assemble the Actuator with turbo and  then-> press IC Key 

Condition 2:  Actuator had been calibrated and assembled with turbo

Calibration Step:  Press IC Key

Warning:  Any time when Reset key is pressed, make sure Actuator had been removed from turbo, and then IP->IC 

Warning:  When IP success, make sure turbo gear is in the left limitation location(maximum flow location) and then 

                assemble actuator. If not, calibration cannot success. 

13. How the VGT Actuator Calibration Tool works 

Reset :  Erase last calibrated results.

IP-  Install Position:   Actuator output gear runs to a fixed- position and lock. Make sure Actuator had been removed from turbo 

       before  this step is Executed.

IC-  Install Calibrate: Calibrate the actuator on the turbo

Status lamp: Displays 3 different colors- Red、Blue and Green. 

14. How to Maintain your VGT Turbocharger ?

As VGT Turbocharger looks more complicated, and the maintenance work should be more careful, the following steps will help.

1. Engine oil regularly changed.

2. Add coolant regularly

3. Check the intake system if your vehicle air leaks.

4. Check the exhaust system for any leaking issue

5. Get the engine warmed up before a drive

The above steps are for basic turbocharger maintenance, below are VGT actuator inspection for Electrical and mechanism.

1. Check turbocharger's turbine shaft wheel at axial moving

2. Check turbochargers' wheel and shaft at its radial movement.

3. Get the VGT actuator calibrated to turbocharger.

15. Delsonpower VGT Actuators Available for below: