New Torque Specification Used On Bolts That Hold The Cylinder Head
Usage:
D330C, D333C, 3304, 3306 Engines
Description of Change: A new torque for the bolts that hold the cylinder heads for the above engines is increased from 175 ± 5 lb ft (240 ± 7 N·m) to 185 ± 12 lb ft (250 ± 17 N·m). This will prevent possible coolant leakage at the cylinder head gasket. During installation of a cylinder head on any of the above engines, be sure to use the new torque value. The minimum amount of torque on the head bolts must not be less than 150 lb ft (203 N·m) after engine tests.
Make a note of the torque value change in your Service Manual for the specific engines until a revision of the Service Manuals is made.
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