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 the coolant pipes and coolant hoses must line up across from each other.
1 Radiator
• Removing and installing, refer to => [ Radiator ] Radiator.
• 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 ] Service and Repair.
• Thermostat removing and installing. Refer to => [ Coolant Thermostat ] Coolant Thermostat.
• Checking the coolant thermostat, refer to item 17 in => [ Coolant Pump and Thermostat Overview ] Coolant Pump and Thermostat Overview, part 1, belt pulley side.
5 Front Coolant Line
• Secured to the accessory bracket.
6 Expansion Tank
• With the 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 => [ By-Pass Thermostat Overview ] Coolant Pump and Thermostat Overview.
• Checking, refer to => [ Checking the Bypass Thermostat: ] Coolant Pump and Thermostat Overview.
13 Oil Cooler
14 Coolant Hose
Two versions:
• Without a engine pre-heater
• With a engine pre-heater.
15 Pre-Heater
• Only on vehicles with a engine pre-heater.
16 Throttle Valve Control Module (J338)
• The throttle valve control module heated by coolant has been discontinued.
17 Radiator Lower Connection
18 Radiator Upper Connection