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TSB 09-07-91

Cylinder Head Bolt Tightening Torque Procedure 1991-92 5.9L Cummins (Intercooled) Engine

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Models: 1991-1992 (AD) RAM PICKUP/RAM CAB & CHASSIS POWER RAM CAB & CHASSIS

NOTE-. THIS BULLETIN APPLIES TO 5.9L CUMMINS DIESEL (INTERCOOLED) ENGINES ONLY.

Service Manual Revision:

The cylinder head bolt tightening torque procedure is incorrect on page 9-19 in the 1991 Diesel Engine Service Manual Supplement, Publication #81-370-1108A, and page 9-109 in the 1992 D & W 150-350 Ramcharger Service Manual, Publication #81-370-2108.

The correct head bolt tightening torque procedure is:

• Step 1 - Tighten all bolts, in sequence (Fig.12), to 90 N-m (66 ft. lbs.) torque. Check the torque. If lower than 90 N-m (66 ft. lbs.), tighten to this torque.

• Step 2 - Tighten all long 12 mm bolts (number's 4,5,12,13,20, and 21), in sequence (Fig. 12), to 120 N-m (89 ft. lbs.) torque. Check the torque. If lower than 120 N,m (89 ft. lbs.), tighten to this torque.

• Step 3 - Tighten all bolts, in sequence (Fig. 12), an additional 90°.

Refer to appropriate service Manual for Figure 12.

Notes:

POLICY:    Information only.