2003 5.9 L Cummins Growling Sound on Acceleration

SUBJECT

Growling Sound On Acceleration

OVERVIEW

This bulletin involves installing a rubber isolator between the motor mount and the motor mount bracket.

MODELS

2003 (DR) Ram Truck

SYMPTOM/CONDITION

A growling or moaning sound may be present on heavy acceleration when carrying heavy loads or towing. This condition may be caused by the right motor mount contacting the motor mount frame bracket.

DIAGNOSIS

Inspect the right engine mount and bracket. If the motor mount is contacting the bracket, witness marks (shiny metal) will be present on the frame bracket. If the witness marks are present perform the Repair Procedure.

PARTS REQUIRED

REPAIR PROCEDURE

1. Raise the vehicle on a hoist.
2. Place an adjustable jack stand under the engine to support the engine when the motor mount through bolts removed.
3. Loosen both motor mount through bolts. Leave the nut on the left side mount as this bolt will not be removed. Remove the nut on the right side.
4. Raise the engine with the jack stand until the right side through bolt becomes free. remove the right side bolt. Raise the engine far enough to clear the frame bracket and allow the isolator pad, P/N 55366020AA to be inserted. Insert the isolator on the mount with the Pentastar logo facing the front of the vehicle. Lower the bracket and align the mount with the frame bracket and push the bolt through the isolator and bracket with the threads at the rear.
   Engine Mount
5. Install the nut and tighten both through bolts to 115 N.m (85 ft-lbs.).
6. Remove the jack stand.
7. Lower the vehicle