Cooling System

Coolant Hose Connection Diagram

• When the engine is warm the cooling system is under pressure. If necessary release pressure before beginning any repair work.

• Install only approved clamps for securing hose connections. Refer to the Parts Catalog.

• Use spring-type clip pliers to installing spring clips.

• Always replace gaskets and seals.

• The arrows on coolant pipes and coolant hoses must line up across from each other.






1 Radiator

• Removing and installing, refer to => [ Radiator ] Service and Repair.

• Replace the coolant after replacing.

2 Coolant Line

3 Intake Manifold

4 Coolant Pump and Coolant Thermostat

• Coolant pump removing and installing. Refer to => [ Coolant Pump ] Coolant Pump.

• Thermostat, removing and installing. Refer to => [ Coolant Thermostat ] Coolant Thermostat.

• Checking the thermostat => [ (Item 17) Coolant Thermostat ] Coolant Pump and Thermostat Overview.

5 Front Coolant Line

• Secured to the accessory bracket.

6 Expansion Tank

• With sealing cap.

• Pressure relief valve in cap, checking. Refer to => [ Cooling System, Checking for Leaks ] Testing and Inspection.

7 Rear Coolant Pipe

8 Cylinder Head/Cylinder Block

• Replace the coolant after replacing.

9 Coolant Thermostat Housing

10 Heater Core

• Replace the coolant after replacing.

11 Transmission Oil Cooler

• Only for vehicles with a automatic transmission.

12 Bypass Thermostat

• Only for vehicles with a automatic transmission.

• Overview, refer to => [ Bypass Thermostat Overview ] Coolant Pump and Thermostat Overview.

• Checking, refer to => [ Bypass Thermostat, Checking ] Coolant Pump and Thermostat Overview.

13 Oil Cooler

14 Coolant Hose

Two versions:

• Without engine pre-warming

• With engine pre-warming

15 Pre-Warmer

• Not available in the US/Canadian market.

16 Throttle Valve Control Module (J338)

• The throttle valve control module heated by the coolant has been discontinued.

17 Radiator Lower Connection

18 Radiator Upper Connection