Volkswagen Golf/Jetta 2 manual

Coolant pump - removal and refitting
Cooling, heating and air conditioning systems / Coolant pump - removal and refitting


1.05 and 1.3 litre engines Removal
1 Drain the cooling system.

2 Remove the air cleaner and air ducting and disconnect the battery negative lead.

3 Unbolt and remove the timing belt cover.

On some later 1.3 litre models, it is necessary to remove the crankshaft pulley to remove the lower timing belt cover.

4 Turn the engine with a spanner on the crankshaft pulley until the timing cover plate upper retaining bolt is visible through the camshaft sprocket hole. Unscrew and remove the bolt.

5 Align the timing marks and release the timing belt from the coolant pump and camshaft sprocket (see illustration).

6.5 Disengage timing belt from coolant pump sprocket
6.5 Disengage timing belt from coolant pump sprocket

6 Remove the bolts and withdraw the timing cover plate followed by the coolant pump (see illustration). Remove the sealing ring.

6.6 Withdrawing coolant pump
6.6 Withdrawing coolant pump

7 It is not possible to repair the coolant pump and if faulty, it must be renewed. Clean the mating faces of the coolant pump and cylinder block.

Refitting
8 Refitting is a reversal of removal.

9 When fitting a pump which has been reconditioned by VW, check to see if the sealing ring groove has been reworked. If it has, a СYТ will be stamped on the pump mounting flange indicating that a 5.0 mm diameter sealing ring should be fitted instead of the normal 4.0 mm diameter ring. Always fit a new sealing ring.

10 Correctly tension the timing belt.

11 On completion, refill the cooling system.

1.6 and 1.8 litre engines Removal
12 Drain the cooling system.

13 Remove the alternator.

14 On models fitted with power steering, it will be necessary to remove the pump unit and mounting bracket for access to the coolant pump.

15 On models equipped with air conditioning, it will be necessary to move aside the compressor unit and its mounting. Do not detach the air conditioning system hoses.

16 Disconnect the three coolant hoses from the pump, then remove the four bolts holding the pump to the cylinder block (see illustration). The pump will probably be stuck to the block but will come off if tapped gently.

Remove the O-ring with the pump.

6.16 Coolant pump location (engine removed from vehicle) - 1.6 and 1.8 litre
6.16 Coolant pump location (engine removed from vehicle) - 1.6 and 1.8 litre

17 Remove the pulley and then take out the eight bolts which secure the bearing housing and impeller to the coolant pump housing.

The two halves may now be separated (see illustration). Do not drive a wedge in to break the joint. Clean off the old gasket.

6.17 Two halves of coolant pump - 1.6 and 1.8 litre
6.17 Two halves of coolant pump - 1.6 and 1.8 litre

18 Remove the thermostat.

19 The impeller housing and impeller complete with bearings are serviced as one part. If coolant is leaking through the bearing, or the impeller is damaged, the complete assembly must be renewed.

20 Fit a new gasket using jointing compound, then fit the two pump halves together and tighten the bolts evenly.

21 Fit the thermostat.

Refitting
22 Refitting is a reversal of removal. Always fit a new O-ring.

23 On completion, refill the cooling system.

24 Correctly tension the drivebelt(s).


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