Volkswagen Workshop Service and Repair Manuals

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Drain coolant.See: Cooling System/Service and Repair

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Remove ribbed belt.See: Drive Belts, Mounts, Brackets and Accessories

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Remove upper and center parts of toothed belt guard.

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Take toothed belt off coolant pump toothed belt sprocket.

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Unscrew coolant pump securing bolts-1 and remove coolant pump-2-.

Installing 

Installation is carried out in the reverse order, when doing this note the following:
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Moisten new O ring with coolant.

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Insert coolant pump into cylinder block and tighten securing bolts. Tightening torque: 15 Nm 

Note:  The coolant pump plug faces downwards.

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Installing toothed belt and adjusting timing.

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Install ribbed belt.

Filling with new coolant.