Removal/refitting

REMOVAL/REFITTING

1. Empty the coolant fluid from the header tank using a suitable syringe.
2. Disconnect the air relief and coolant return pipe from the header tank.
3. Disconnect the radiator connection pipe from the header tank.
4. Disconnect the system supply pipe from the header tank.
5. Slacken the three fastening screws and remove the header tank.

1. Part 1
2. Part 2
3. Part 3
4. Part 4
5. Part 5

PRESSURIZED CAP SEAL TEST

1. Connect the union on the lower end of the testing device.
2. Fit the header tank pressurized cap on the union.
3. Pressurize working manually on the piston and check that the valve on the cap opens at the specified setting using a pressure gauge.

1. Part 1
2. Part 2
3. Part 3

ENGINE COOLING SYSTEM SEAL TEST

• Slacken and remove the pressurized cap from the header tank.

WATER PUMP

The water pump is of the centrifugal blade type. The pump casing is made from aluminium alloy and the impeller is in phenolic resin. The pump is fastened to the crankcase and operated by a Poly V belt driven by the crankshaft. A gasket seals the joint between the crankcase and the pump. The water pump operates constantly, thus ensuring continuous circulation of the coolant fluid.

REMOVAL/REFITTING 1712 16V

Proceed as described in GROUP 01 "REMOVAL/REFITTING CYLINDER HEADS" up to removal of the left-hand timing belt.

1. Screw the seal test device fitted with special union on the header tank union.

2. Pressurize the circuit manually and check on the test device that the pressure maintains the rating specified, if not, check the sleeves and radiator for leaks.

WARNING: For safety reasons, during these tests never allow the pressure to exceed 1.38 bar (1.4 kg/cm²).