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N14 Base Engine Troubleshooting and Repair Manual – 008-062   Water Pump

Table of Contents

Remove
Clean
Install

Remove

 TOC

Drain the cooling system. Refer to Procedure 008-018.

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 WARNING 

Coolant is toxic. Keep away from children and pets. If not reused, dispose of in accordance with local environmental regulations.

Remove the water pump drive belt. Refer to Procedure 008-003.

Remove the fan hub and the water pump idler assembly. Refer to Procedures 008-036 and 008-064.

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Remove the coolant inlet transfer connection from the water pump.

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NOTE: The water pump must be removed carefully to prevent damage to the impeller.

Remove the six mounting capscrews from the water pump.

Remove the water pump from the engine.

Remove the water pump out and in a downward direction to clear the dowel pin, and disconnect the water transfer tube attached to the thermostat housing.

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Clean

 TOC

Clean the water pump gasket surface on the cylinder block.

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Install

 TOC

 CAUTION 

The water pump must have a dowel pin locating hole (2) and an oil cooler return passage (1). Engine damage can occur due to lack of coolant flow through the oil cooler if this oil cooler return passage does not exist.
 
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Install the water transfer tube attached to the thermostat housing into the water pump.

Inspect the transfer tube o-ring. Replace, if necessary.

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Install the water pump to the block, using the six mounting capscrews. Tighten the capscrews to the following torque values:

Torque Value: Step 1 15 n.m   [10 ft-lb]
  Step 2 30 n.m   [20 ft-lb]
  Step 3 47 n.m   [35 ft-lb]

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Install the coolant inlet transfer connection and a new gasket onto the water pump.

Tighten the capscrews.

Torque Value:  47  n.m  [35 ft-lb]

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Install the fan hub and the water pump idler assembly. Refer to Procedures 008-036 and 008-064.

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Install and adjust the water pump belt. Refer to Procedure 008-003.

NOTE: Belt tension can increase when the lock nut is tightened.

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Fill the engine with heavy duty coolant. Refer to Procedure 008-018.

Start the engine and check for leaks.

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Last Modified:  17-Mar-2005
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