Comment:

DODGE TRUCK ENGINE – RATTLING/LIFTER TYPE NOISE TECHNICAL SERVICE BULLETIN Federal-Mogul Document #1014

Chrysler has published a TSB (Technical Service Bulletin) #09-07-97 that addresses the subject of Timing Chain Noise in the Dodge Trucks listed below when equipped with the 3.9L engine. Federal-Mogul recommends installation of the Chrysler p/n 53021195AA when servicing the timing components of these vehicles.

1990-1997 Dakota 1990-1997 Ram Van/Wagon 1990-1993 Ram Pickup/Ram Cab & Chassis/Ramcharger 1994-1997 Ram Truck

Symptom/Condition: Rattling or lifter type noise coming from the front (chain case) area of the engine.

Diagnosis: Start the engine and bring it to operating temperature. Increase and decrease engine RPM slightly while listening to the front end of the engine for a rattling or lifter type noise. A stethoscope can be used to help pin point the noise location. If the noise is found coming from the timing chain case, perform the repair procedure.

Repair Procedure: This bulletin involves replacing the timing chain and sprockets and installing a timing chain tensioner.

1. Following the appropriate service manual procedures, disassemble the front end of the engine to gain access to the timing chain and sprockets.

2. Remove the chain and sprockets from the engine. Discard the parts.

3. Remove the thrust plate and chain oil tab (figure 1). Discard the parts. Figure 1

1 of 2 4. Install the timing chain tensioner (Chrysler part Timing Chain Tensioner Assembly number) p/n 53021195AA in the position where the thrust plate and oil tab was installed (figure 2). Torque the bolts to 24 Nm (210 in. lbs.).

5. Install the new timing sprockets and chain. Align the timing marks per the appropriate service manual procedure. Torque the camshaft bolt to 68 Nm (50 ft. lbs.). Figure 2

6. Remove the lock pin that holds the tensioner plate for the chain. Discard the pin.

Note: WITH THE TIMING CHAIN TENSIONER INSTALLED, THE CAMSHAFT ENDPLAY WILL BE 0.051 – 0.330 mm (.002 TO .013 IN.).

7. Reinstall the remaining components per the appropriate service manual procedures.

2 of 2