Removal, installation, disassembly and assembly of the water pump (Skoda Felicia)

Water pump (design elements)

Water pump (longitudinal section)

Diesel Engine Water Pump/Powertrain Mount Bracket Assembly Components

General information

The centrifugal water pump is driven by a belt drive from the engine crankshaft and ensures the circulation of the coolant. The liquid located between the blades of the rotating rotor is pushed out by centrifugal force. The housing is cast from aluminum and also serves as a housing for the rubber cushion of the powertrain suspension support. The housing is fastened to studs mounted in the front wall of the cylinder block using four M8 nuts.

A sealing gasket is installed between the pump body and the block.

The rotor shaft is located inside the housing, which is an integral part of the PLC 75-1 bearing. The bearing is installed in the pump housing using a pin with a diameter of 5 mm and a length of 35 mm. The bearing is filled with grease at the manufacturing plant and does not require regular maintenance.

A drive pulley is pressed onto the shaft journal protruding from the pump housing. The sealing of the journal seat in the housing is ensured by a seal consisting of a ceramic ring and a spring-loaded profile ring placed on it.

Models with 1.3L petrol engine

Note. A major overhaul of a failed water pump is only possible in the conditions of a Skoda branded service center workshop, where the entire removed assembly should be delivered complete with the casing. Alternatively, the assembly can be replaced with a new one. Consult with specialists.

Removal

1. Drain the cooling system. The water pump is built into the right powertrain mount assembly.

2. Remove the air cleaner assembly.



3. Remove the accessory drive belt.



4. Unscrew the bolt securing the cooling tract tube to the right end of the engine, then loosen the mounting clamp and disconnect the tube from the pump assembly hose.



5. On the transmission side, disconnect the gear selector shaft, then release the clamp to gain access to the roll pin.

Note: It would be better to replace the branded clamp with a more convenient standard one during assembly. Knock out the cylindrical pin (during assembly it must be replaced without fail).

6. Unscrew the bolt securing the gearshift rod to the manual transmission unit, remove the washers and the rubber support cushion.

7. Raise the jack to the engine (a wooden block should be placed between the jack head and the oil pan to distribute the load) and lift the power unit slightly. Alternatively, support the unit from above using a winch or beam.



8. Loosen the nut and remove the through bolt of the rear support of the power unit.

9. Loosen the nut and remove the through bolt of the right support. In order to provide sufficient working space for removing the bolt, remove the plug of the right mudguard. The bolt is then removed through the opened hole and removed through the arch of the right wheel.

10. Mark the position of the right powertrain support bracket in relation to the vehicle body, then unscrew the mounting bolts and remove the bracket.



11. Loosen the two nuts securing the water pump assembly and support to the cylinder block. Remove the assembly from the mounting studs and lift it out of the vehicle, adjusting the suspension height of the unit as necessary, being careful not to place excessive stress on the exhaust system components or to pull on the wiring harnesses and hoses.

12. Remove the sealing gasket. It must be replaced during assembly.

Installation

1. Make sure that the mating surfaces of the pump and cylinder block are absolutely clean and dry. Put a new sealing gasket on the mounting studs.



2. Install the pump housing assembly onto the cylinder block and tighten the mounting nuts to the required torque.

3. Install the right powertrain support bracket in its regular place and screw in the mounting bolts. Align the mounting marks made during dismantling, then tighten the bolts to the required torque.

4. Align the right support with the bracket, insert the through bolt and screw on the nut, tightening it only by hand for now. Install the plug in the right wing splash guard.

5. Install the through bolt of the rear support of the power unit, screw on the nut and tighten it lightly.

6. Lower the engine. Rock the unit slightly to settle the components, then tighten the fasteners of both mounts to the required torque.

7. Clean the threads of the gearshift rod bolt, completely removing all traces of old sealant from the threads. Make sure that the rubber cushions and washers are correctly positioned, then connect the rod to the gearbox housing. Lightly lubricate the bolt threads with a sealant such as Loctite 270 or Three Bond 1305). Screw in the bolt and tighten it to the required torque (see Chapter Transmission).

8. Connect the gear selection rod to the box and secure it with a cylindrical pin. Secure the pin with a clamp.

9. Connect the cooling tract tube and secure it with a bolt, tightening the latter to the required force. Firmly tighten the clamp securing the tube to the hose.

10. Install the accessory drive belt (see the relevant Section of Chapter Engine repair).

11. Install the air cleaner assembly.



12. Install the crankcase guard, tighten the screws securely, then lower the vehicle to the ground.

13. Fill the cooling system.

Models with 1.6L petrol engine

Removal

1. Remove the timing belt with tensioner (see the relevant Section of the Chapter Engine repair).

2. Drain the cooling system.



3. Remove the two water pump mounting bolts...



...and remove the rear timing belt cover from the latter.



4. Remove the pump from the cylinder block. Also remove the sealing ring, which must be replaced during assembly.

Installation

1. Install a new sealing ring on the pump. Place the pump in its proper place in the cylinder block. Install the rear timing belt cover, screw in the pump mounting bolts and tighten them to the required torque.

2. Reinstall the timing belt (see the appropriate Part of the Chapter Engine repair).

3. Finally, fill the cooling system.

Diesel models

Removal

1. Drain the cooling system.

2. Remove the generator.

3. Without disconnecting the hydraulic lines, unbolt the steering pump from its mounts (see Chapter Suspension and steering) and move it away from the water pump housing.

4. Remove the bolt securing the rear fuel injection pump bracket to the top of the water pump housing/powertrain support bracket assembly.

5. Loosen the clamps and disconnect the coolant hoses from the rear of the pump/support bracket assembly.



6. Remove the mounting bolts and the pump/support bracket assembly from the front of the cylinder block. Remove the sealing ring installed between the casing and the block. The ring must be replaced during assembly.



7. Place the assembly on a workbench, unscrew the mounting bolts and remove the pulley from the pump. Loosen the bolts and remove the pump from the casing. Discard the sealing ring - it must be replaced during assembly.

Installation

1. Make sure that the mating surfaces of the pump and casing are absolutely clean and dry, install a new sealing ring.

2. Install the pump on the casing and tighten the mounting bolts evenly to the required torque. Install the pulley and tighten its mounting bolts to the required torque.



3. Insert a new O-ring into the housing assembly groove, then install the housing onto the cylinder block, install the mounting bolts and tighten them to the specified torque in the specified order.

4. Connect the cooling system hoses to the casing and secure them securely with clamps.

5. Install the generator, water pump and accessory drive belt in their original places.

6. Finally, fill the cooling system.

Disassembly

The process of disassembling the water pump is shown in the illustrations.



Data taken from this portal SkodaBook.ru

Assembly

The process of assembling the water pump is shown in the illustrations.