Replacing Thermostat Valve and Changing Engine Coolant—A-Type

1. 

   
   T6642EK-UN-01NOV88

   
   CQ298622-UN-09DEC13

   
   CQ298623-UN-09DEC13

   
   CQ298624-UN-09DEC13

   A - Radiator Cap

   B - Clamps (2 used)

   C - Hose

   D - Drain Valve

   Coolant can be hot. Wait until radiator and engine block cool down before touching them.
   Do not remove cap of coolant recovery tank until the water temperature has lowered to approx. ambient temperature.

   Remove radiator cap (A).

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2. Unfasten clamps (B), remove hose (C), and drain coolant into a suitable container.

3. For a complete system drain, open cylinder block drain valve (D) and drain the remaining coolant into an appropriate container.

   Radiator cap (A) is responsible for maintaining cooling system pressurized. Check condition of seal and replace if necessary.

4. Remove connector (A) and replace bolts (B).

   
   CQ298625-UN-09DEC13

   A - Connector

   B - Bolt (2 used)

   C - Lid

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5. Remove cover (C) and thermostat valve.

6. Reinstall cover (C) without the thermostat valve, tighten bolts (B) to specified torque and reinstall connector (A):

   Bolts (B)	Torque	47 N·m (35 lb·ft.)

7. 
   CQ298624-UN-09DEC13

   
   CQ298623-UN-09DEC13

   B - Clamps (2 used)

   C - Hose

   D - Drain Valve

   Close drain valve (D) in cylinder block, reinstall hose (C) and tighten clamps (B).

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8. Fill system with clean water and let engine operate until reaching service temperature.

9. Shut off engine and drain system again as described before.

   When reinstalling components, install a new thermostat valve.

10. 
    CQ294956-UN-04DEC13

    A - MAX Mark

    B - MIN Mark

    C - Filler Neck

    Through filler neck (C), refill system with coolant recommended in Section Fuel, Lubricants and Coolant, quantity recommended in Section Specifications—Capacities.

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11. Start engine and run until operating temperature is reached.

12. Check coolant level. Engine coolant level should be close to marking MAX. (A). If the coolant is at the marking MIN. (B), add coolant until reaching the level.