GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 2002 🢒 Isuzu T-Series (Truck Line C) 🢒 Engine 🢒 Engine Cooling 🢒 Engine Coolant Thermostat Replacement

Removal Procedure
  1. Tilt the cab. Refer to Cab Tilting .
  2. Drain the coolant. Refer to Cooling System Draining and Filling .
  3. Remove the upper radiator hose from the coolant outlet.

    4. Object Number: 228201 Size: SH
  4. Remove the coolant outlet bolts.
  5. Remove the coolant outlet (1).
  6. Remove the thermostats (2).
  7. Clean the following surfaces:
    8. • The inlet manifold
    • The coolant outlet
  8. Inspect the coolant outlet for the following conditions:
    9. • Flat mating surfaces
    • Pits
    • Cracks
    • Other damage

Installation Procedure

    Object Number: 228198 Size: SH

    Important: Place the thermostat with the jiggle valves on the left side.

  1. Install the thermostats.

    2. Object Number: 228201 Size: SH
  2. Install the coolant outlet (1).

    3. 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.

  3. Install the coolant outlet bolts.

    4. Tighten
    Tighten the coolant outlet bolts to 19 N·m (14 lb ft).

  4. Install the upper radiator hose to the coolant outlet.

    5. Tighten
    Tighten the clamp to 5 N·m (44 lb in).

  5. Fill the cooling system. Refer to Cooling System Draining and Filling .
  6. Inspect the system for leaks.
  7. Lower the cab.