GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 GMC_Truck 🢒 1998 🢒 GMC P42 Commercial Chassis 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Engine Mount Replacement

Removal Procedure
  1. Raise and support the vehicle with suitable safety stands. Refer to Lifting and Jacking the Vehicle in General Information.

    2. Object Number: 374320 Size: SH

    Notice: When raising or supporting the engine for any reason, do not use a jack under the oil pan, any sheet metal, or the crankshaft pulley. Lifting the engine in an unapproved manner may cause component damage.

  2. Using a jack on the square tab (left side shown) at the rear of the engine block, raise the engine. Remove the starter in order to access the square tab on the right side. Refer to Starter Motor Replacement in Engine Electrical.

    3. Notice: Raise the engine to allow sufficient clearance. Distributor damage results from interference between the rear of the engine and the dash panel.

  3. Raise the engine only enough in order to permit removal of the engine mount.
  4. Remove the engine mounting through-bolt and the nut.

    5. Object Number: 68945 Size: SH
  5. Remove the following components from the engine mount:
    6. • The bolts
    • The nuts
    • The washers
  6. Remove the engine mount.
  7. Remove the bolts that retain the engine mount bracket to the engine.
  8. Remove the engine mount bracket.

Installation Procedure

    Object Number: 68945 Size: SH
  1. Install the engine mount assembly.

    2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the following components to the engine mount:
    3. • The bolts
    • The nuts
    • The washers

    Tighten
    Tighten the nuts to 41 N·m (30 lb ft).

  3. Install the engine mount bracket.
  4. Install the bolts that retain the engine mount bracket to engine.

    5. Tighten
    Tighten the bolts to 47 N·m (35 lb ft).

  5. Install the engine mount through-bolt and the nut.
    6. 5.1. Lower the engine until the bolt can be inserted.
    5.2. Install the through-bolt and the nut.

    Tighten
    Tighten the nut to 56 N·m 41 lb ft).

  6. Lower the vehicle.