D 250 Pickup L6-359 5.9L DSL (1992)
Cylinder Head Bolts: Technical Service Bulletins
Cylinder Head Bolt Tightening Torque - Manual Revision
NO.:
09-07-91
GROUP:
Engine
DATE:
Dec. 2, 1991
SUBJECT:
Cylinder Head Bolt Tightening Torque Procedure 1991-92 5.9L Cummins (Intercooled) Engine
NOTE:
THIS BULLETIN APPLIES TO 5.9L CUMMINS DIESEL (INTERCOOLED) ENGINES ONLY.
MODELS:
1991-1992 (AD) RAM PICKUP/RAM CAB & CHASSIS POWER RAM CAB & CHASSIS
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 degrees.
Refer to appropriate service manual for Figure 12.
POLICY:
Information only.
