Workshop Manuals Factory service & repair Alfa Romeo
Alfa Romeo 145/146 Factory Service Manual (1994-1999)03 · Engine
03 · Engine

Water pump

Make
Alfa Romeo
Model
145/146 Factory Service Manual
Year
1994–1999
Section
Engine cooling system (1970 T. SPARK 16V) › Water pump
EngineWater pump · page 1 of 2

WATER PUMP

The water pump is of the centrifugal type with blades. It is fastened to the cylinder head and operated by the crankshaft via the timing gear belt. An O-Ring ensures tightness between the cylinder head and the pump. The water pump is kept running constantly to ensure that the coolant fluid circulates continuously.

Cross-section of water pump showing pulley, impeller, pump casing, O-ring, and bearing
1. Pulley
2. Impeller
3. Pump casing
4. O-Ring
5. Bearing

REMOVAL/REFITTING

  • Set the car on a lift.
    - Disconnect the battery (-) terminal.
    - Drain the engine cooling system (see relative paragraph).
  1. Slacken the screws and move the header tank to one side without disconnecting the piping.
Illustration showing header tank being moved aside while connected to piping
  1. Raise the car and working as illustrated on the belt tensioner loosen the tension of the auxiliary components drive belt and remove it.
  2. Slacken the four fastening screws and remove the auxiliary components drive pulley.

24 ÷ 29 Nm
2.4 ÷ 3.0 kgm

Illustration showing removal of belt tensioner, drive belt guide pulley, and lower cover of timing gear and counter-rotating shaft drive belts
1. Slacken the fastening screw and remove the belt tensioner.
2. Slacken the fastening screw and remove the auxiliary components drive belt guide pulley.
3. Slacken the fastening screws and remove the lower cover of the timing gear and counter-rotating shaft drive belts.
  • Slacken the lower screws of the upper cover of the timing gear and counter-rotating shaft drive belts.
    1. Lower the car, slacken the fastening screws and remove the upper cover.
Illustration showing removal of upper cover of timing gear and counter-rotating shaft drive belts
Illustrates removal of upper engine cover component

Parts & tools for this job For 1994 Alfa Romeo 145/146

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