Electronic Control System Signature, ISX and QSX15 Engines – 019-111   Timing Actuator

General Information

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The timing actuators are located on the engine in front of the ECM. There are two of them. The front timing actuator is located on the fuel delivery housing. It is the second actuator from the front of the engine.

The rear timing actuator is located on the fuel delivery housing. It is the second actuator from the rear of the engine.

 
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Test

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Perform INSITE™ electronic service tool Cylinder Performance Test to determine if an actuator has failed. If a bank fails, this could indicate an actuator failure.

If only two injectors in a bank fail, repeat the test. Swap the front and rear fueling actuators to determine if the failed bank of cylinders follows the actuator. If so, replace the failed fueling actuator as necessary.

If not, swap the front and rear timing actuators to determine if the failed bank of cylinders follows the actuator. If so, replace the failed timing actuator as necessary.

 
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Remove

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NOTE: The front timing actuator is located on the fuel delivery housing. It is the second actuator from the front of the engine. The rear timing actuator is located on the fuel delivery housing. It is the second actuator from the rear of the engine. In the illustration, the front timing actuator is at the lower left and the rear timing actuator is at the upper right.

Clean the area around the timing actuator.

Disconnect the timing actuator connector from the engine harness.

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Remove the three capscrews securing the timing actuator to the fuel delivery housing.

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Install

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Install a new o-ring. Apply grease to the o-ring groove to retain the o-ring during installation.

Install the three capscrews securing the new timing actuator to the fuel delivery housing.

Torque Value:  15.3  n.m  [135 in-lb]

Connect the engine harness to the timing actuator. Start the engine and check for leaks.

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Last Modified:  08-Nov-2009