Peugeot 405 Manual

Coolant pump - removal and refitting
Cooling, heating and ventilation systems / Coolant pump - removal and refitting


Note: A new pump gasket or O-ring (as applicable) will be required on refitting.

Removal
1 The coolant pump is driven by the timing belt, and is bolted to the cylinder block at the timing belt end of the engine. Note that on 1.4 litre aluminium cylinder block engines, the coolant pump is bolted to a separate housing which is in turn bolted to the side of the cylinder block.

2 Drain the cooling system as described in Chapter 1.

3 Remove the timing belt as described in Chapter 2.

4 Where necessary, for access to the coolant pump, remove the timing belt tensioner and/or the rear timing belt cover as described in Chapter 2.

5 On 1.4 litre engines, support the engine by placing a trolley jack and interposed block of wood under the sump, then remove the upper engine mounting as described in Chapter 2.

6 Remove the securing bolts, and withdraw the pump from the cylinder block (access is most easily obtained from under the wheel arch). Recover the gasket or the O-ring, as applicable (see illustrations).

7.6a Withdraw the coolant pump . . .
7.6a Withdraw the coolant pump . . .

7.6b . . . and recover the O-ring - 1.4 litre engine shown
7.6b . . . and recover the O-ring - 1.4 litre engine shown

7.6c Removing the coolant pump (1.6 litre engine) - shown with engine removed
7.6c Removing the coolant pump (1.6 litre engine) - shown with engine removed

7 On 1.4 litre aluminium cylinder block engines, if desired, the pump impeller housing can be removed from the rear of the coolant pump housing. Access is most easily obtained from underneath the vehicle (it may be necessary to remove the exhaust heat shield). Disconnect the coolant hoses from the impeller housing (be prepared for coolant spillage), then remove the securing bolts and withdraw the impeller housing. Again, recover the O-ring.

Refitting
8 Ensure that all mating faces are clean.

9 Where applicable, refit the impeller housing to the pump housing, using a new O-ring.

Reconnect the coolant hoses.

10 Refit the pump using a new gasket or O-ring, as applicable.

11 Where applicable, refit the upper engine mounting, with reference to Chapter 2, then remove the jack from under the sump.

12 Where applicable refit the rear timing belt cover and/or the timing belt tensioner with reference to Chapter 2.

13 Refit the timing belt (refer to Chapter 2).

14 Refill the cooling system (see Chapter 1).


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