Note. To avoid scalding, the hoses can only be removed after the engine has cooled down.
Removing
- Hoses and tubes provide connection to the elements of the engine cooling system.
- Drain the coolant from the cooling system.
- Remove the top engine cover.
- Remove the air filter.
- Remove the intake manifold before removing the cooling system outlet pipe.
- The sequence of removal of hoses and tubes of the cooling system is shown in Figures 5.22 and 5.23.
- Mark the radiator hose clamps and hoses, then loosen the clamps and disconnect the upper and lower hoses from the radiator.
Pic. 5.22. Hoses and pipes of the 4G9 engine cooling system:1 - lower radiator hose; 2 - coolant temperature sensor connector; 3 - thermostat; 4 - sealing ring; 5 - heater hoses; 6 - hose of the cooling system; 7 - outlet pipe of the cooling system; 8 - sealing ring
Pic. 5.23. Hoses and pipes of the 4G1 engine cooling system: 1 - upper radiator hose; 2 - lower radiator hose; 3 - wiring harness connector; 4 - hose of the cooling system; 5 - clamp; 6 - thermostat; 7 - gasket; 8 - sealing ring; 9 - heater hoses; 10 - hose of the cooling system; 11 - outlet pipe of the cooling system; 12- O-ring
Examination
- Check the pipes and hoses of the cooling system for cracks, damage, abrasions and internal plugs.
Installation
- Installation is carried out in the reverse order of removal, taking into account the following.
- Push the hoses onto the nozzles so that their ends reach the protrusions on the nozzles.
- Secure the hose with a clamp, while matching the marks on the hose and clamp.
- Clean the mating surface of the thermostat housing.
- Apply a 3.0 mm diameter sealant to the mating surface of the thermostat housing (pic. 5.24).
Sealant: Mitsubishi Genuine Part No. MD970389
Pic. 5.24. Places for applying sealant to the mating surface of the thermostat housing
- Install a new O-ring into the groove on the front end of the coolant tube and wet the O-ring with coolant. Insert the end of the pipe into the outlet pipe of the cooling system (pic. 5.25). Keep engine oil and grease away from the O-ring surface.
Pic. 5.25. Installing the sealing ring on the cooling system tube
- Pour coolant into the cooling system.
- Start the engine and check for leaks from the cooling system.
- Check coolant level.