For 1990-2009 cars

# SERVICE MANUAL UPDATE SEC. 6A ENGINE MOUNT TIGHTENING SPEC.

#### SUBJECT: 3.1L (VIN T) ENGINE FASTENER TIGHTENING SPECIFICATIONS

#### MODELS/YEARS: 1990-92 CUTLASS SUPREME

The following changes should be made to your copies of the Cutlass Supreme Service Manuals.

Year Page 1990 6A5-49 1991 6A5-59 1992 6A5-58

In the 1990 Cutlass Supreme Service Manual;

o The fastener tightening specification for the Rocker Arm Nut should read 24 Nm (18 lbs. ft.).

o The Front Cover Bolt figure reference should read Figure 20.

In the 1991 Cutlass Supreme Service Manual, the fastener tightening specifications listed below should read as follows:

Engine Mount to Frame Nut 45 Nm (33 lbs. ft.) Engine Bracket to Engine Mount Nut 45 Nm (33 lbs. ft.) Rocker Arm Nut 24Nm (18lbs.ft.) Valve Cover Bolt 10 Nm (89 lbs. in.)

In the 1991 Cutlass Supreme Service Manual, the figure references listed below read as follows:

Cylinder Head Bolt Figure 28 Front Cover Bolt Figure 24 Intake Manifold Bolt Figure 16

In the 1992 Cutlass Supreme Service Manual, the fastener tightening specifications listed below should read as follows:

Engine Mount to Frame Nut 45 Nm (33 lbs. ft.) Engine Bracket to Engine Mount Nut 45 Nm (33 lbs. ft.) Rocker Arm Nut 24 Nm (18 lbs. ft.) Valve Cover Bolt 10 Nm (89 lbs. in.)

The valve lash adjustment procedure should be used after reconditioning a valve seat when a new adjustable rocker arm stud has been installed. The fastener tightening specification for an adjustable rocker arm stud is 62 Nm (46 lbs. ft.).

Please note these changes in the appropriate Service Manuals.

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those technicians of conditions that may occur on some vehicles, or to provide information that could assist in the proper service of a vehicle. Properly trained technicians have the equipment, tools, safety instructions and know-how to do a job properly and safely. If a condition is described, do not assume that the bulletin applies to your vehicle, or that your vehicle will have that condition. See a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.