Service Information Regarding Upper Engine Mount Assembly #01-T-30A - (Jan 7, 2003)

1992-2002 Saturn S-Series Vehicles

Please distribute this bulletin to: Parts Manager and all Technicians

Purpose

This bulletin contains new sag measurement and replacement procedures for upper engine mounts.

The first design upper engine mount (P/N 2101285) is being reintroduced into production and will be the only mount used to service all 1992-2002 Saturn S-Series vehicles. This first design mount requires longer engine front cover studs (P/N 21008003).

Refer to "Engine Mount Sag Measurement Procedures" in this bulletin to verify the need for upper engine mount assembly replacement. If replacement is required, refer to "Engine Mount Assembly Removal Procedure, " "Front Cover Stud Installation Procedure," and "Engine Mount Assembly Installation Procedure" in this bulletin.

Engine Mount Sag measurement Procedure (First Design Engine Mount)

1. Inspect the vehicle to see if current top engine mount is a first design mount. Refer to the following illustration.





Important

The measurement procedure in Step 2 of this procedure can be used to measure sag on both first and second design engine mounts.

2. Using two 150 mm (6 in.) scales or a 150 mm (6 in.) scale and a suitable straight edge, measure engine mount assembly as shown in the First Design Mount Illustration.
• If measurement is equal to or less than 39 mm (1 17/32 in.), proceed to "Engine Mount Assembly Removal Procedure" in this bulletin and replace engine mount assembly.
• If measurement is greater than 39 mm (1 17/32 in.), engine mount assembly does not require replacement.

Engine Mount Sag measurement Procedure (Second Design Engine Mount)

1. Inspect the vehicle to see if current top engine mount is a second design mount. Refer to the following illustration.





Important

The measurement procedure in step 2 can only be used for the second design mount.

2. Measure gap in mount at location shown in the Second Design Mount Illustration. A 2 mm (5/64 in.) Allen wrench or hex key can be used as a go/no go gauge for this measurement.
• If tool does not fit in gap, proceed to "Engine Mount Assembly Removal Procedure" in this bulletin and replace engine mount assembly.
• If tool fits in gap, engine mount assembly does not require replacement.

Engine Mount Assembly Removal Procedure

1. Remove the 2 engine mount-to-midrail bracket fasteners.
2. Place a floor jack under the engine oil pan. Use a block of wood between the oil pan and jack. Raise the powertrain just enough to unload the mount. The engine is raised enough when there is clearance between the mount and the midrail bracket.




3. Remove the 3 engine mount-to-front cover fasteners, and remove the engine mount.
4. Remove engine mount.
5. If vehicle has second design mount, remove three engine mount cover studs and discard.

Notice

If the engine mount front cover stud turns or comes out during nut removal, the stud must be fully installed prior to installing the mount and/or nut. Damage to the front cover may occur if the stud is driven with the nut and does not sufficiently engage the front cover threads.

6. Proceed to one of the following sections in this bulletin, as appropriate:
• If vehicle is equipped with first design mount and no studs turned or come out during removal, proceed to "Engine Mount Assembly Installation Procedure."
• If vehicle is equipped with first design mount and studs turned loose during removal, proceed to "Front Cover Stud Installation Procedure."
• If vehicle is equipped with second design mount, proceed to "Front Cover Stud Installation Procedure."

Front Cover Stud Installation Procedure

Notice

If the engine mount front cover stud turns or comes out during nut removal, the stud must be fully installed prior to installing the mount and/or nut. Damage to the front cover may occur if the stud is driven with the nut and does not sufficiently engage the front cover threads.

Important

If the vehicle has first design mount, the front cover studs can be reused with new mount. If the vehicle has second design mount, new longer front cover studs are required with new mount.

1. If vehicle was equipped with second design mount, the front cover studs previously removed cannot be reused. Obtain new, longer front cover studs (P/N 21008003). If vehicle was equipped with first design mount, the original studs can be reused.

Notice

Do not overapply threadlocker or allow it to accumulate in bottom of hole. The front cover could be damaged when the stud is installed.

Important

If reinstalling a previously installed stud, the threads must be thoroughly cleaned before applying threadlocker. If installing a new stud, the stud may or may not have a pre-applied threadlocker. The front cover stud hole must be thoroughly cleaned using a 10 mm x 1.5 tap to clean the threads and compressed air to remove particles from the stud hole.

2. Apply Loctite 242® or equivalent to 6-8 middle threads of clean front cover studs.
3. Apply Loctite 242® or equivalent to the threads of the holes in the engine front cover using a cotton tipped applicator keeping the top 2 threads clean.





Important

The engine mount front cover stud torque specification is new and should be used for repairs on all 1992-2002 S-Series front cover studs.

4. Install the studs into the front cover.
Tighten

Tighten the engine mount front cover studs to 10 N·m (89 lb in).

5. Clean the excess threadlocker from the front cover and studs.
6. Proceed to "Engine Mount Assembly Installation Procedure" in this bulletin.

Engine Mount Assembly Installation Procedure

1. Obtain replacement parts. Refer to "Parts Requirements" in this bulletin.

Important

If equipped, install ground strap to stud on intake manifold side before installing new nut.

2. Position the engine mount to front cover and install NEW nuts.
Tighten

Tighten the engine mount-to-front cover nuts to 50 N·m (37 lb ft).






Notice

When lowering the powertrain, it will be necessary to guide the mount over the midrail bracket studs to prevent damage to the stud threads.

3. Lower the powertrain completely.
4. Install NEW engine mount-to-midrail bracket nuts.
Tighten

Tighten the engine mount-to-midrail bracket nuts to 50 N·m (37 lb ft).






Caution

Make sure the vehicle is properly supported and squarely positioned prior to lifting. To help avoid personal injury when a vehicle is on a hoist, provide additional support for the vehicle on the opposite end from which components are to be removed.

5. Raise the vehicle on a hoist.
6. Loosen the 2 engine strut bracket-to-cradle fasteners to remove any fore/aft preload from the engine strut.
7. Tighten the 2 engine strut bracket-to-cradle fasteners.
Tighten

Tighten the engine strut bracket-to-cradle nuts to 50 N·m (37 lb ft).

8. Lower the vehicle from the hoist.

Parts Information

Warranty Information

To receive credit for this repair during the warranty coverage period, submit a claim through the Saturn Dealer System for J1504 (Mount Torque Axis - Replace), or if another procedure is performed, refer to the appropriate Electronic Labor Time Guide for the correct Labor Operation Code and Time.

Loctite 242 (part number 21485277) may be claimed as material using net item type "M." Claims received in the amount of $4.62 ($3.55 dealer cost plus 30% parts allowance) will be accepted. Claims exceeding the material mount will be returned with return reason 143 - material amount > maximum allowed. Retailer "B" authorization code will not override this return reason.

GM bulletins are intended for use by professional technicians, NOT a "do-it-yourselfer".  They are written to inform these 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 your GM dealer for information on whether your vehicle may benefit from the information.

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