Usage:
3306/B/C (5KD, 69D, 7RJ, 9TL, 76R, 3KS, 2AZ, 63Z) Truck Engines NOT Equipped With Jake®
Brake
Description of Change: A new valve cover seal replaces the former cork valve cover gasket in all 3306, 3306B, and 3306C Truck Engines that are NOT equipped with a Jake Brake. The new seal will provide improved sealing and may be reused up to three times.
Illustration 1.
Valve Mechanism Cover Group Components.
Adaptable To: The new 133-1247 Valve Cover Seal replaces the former 8S-1605 Valve Cover Gasket in the above 3306, 3306B, and 3306C Truck Engines that are NOT equipped with a Jake Brake. The 8N-1605 Gasket is still used on engines equipped with a Jake Brake. The new valve cover seal is effective with 3306C (9TL18852) Truck Engine. If a new seal is installed in place of a former gasket, the fifteen 3B-4505 Lockwashers under the heads of the fifteen bolts that fasten the valve cover to the cylinder head must be replaced with fifteen 9M-1974 Washers.
When the new 133-1247 Valve Cover Seal is used, tighten the fifteen 0S-1617 Bolts (that fasten the valve cover to the cylinder head) in number sequence (see Illustration 2) to a torque of 16 ± 3 N·m (142 ± 27 lb in). When the former 8S-1605 Valve Cover Gasket was used, the fifteen bolts were tightened in number sequence (see Illustration 2) to a torque of 11 ± 3 N·m (98 ± 27 lb in).
Illustration 2.
Valve cover bolt tightening sequence.