How to Replace the Water Pump in a Honda Prelude

The water pump is the heart of the Honda Prelude's cooling system, circulating the coolant. If the water pump goes bad, it can seriously affect the vehicle's engine and cause damage. Make sure to change out a faulty water pump in your Honda Prelude to keep the engine operating normally.

Instructions

2.2L And 2.3L Prelude Engines

1

Disconnect the negative battery cables and drain the coolant from the radiator.

2

Remove all the accessory drive belts. Also remove the valve cover and the upper timing belt cover.

3

Set the TDC/Compression timing for the number one piston. Take out the crankshaft pulley as well as the lower timing belt cover. Take out the timing belt and replace it if it is worn.

4

Loosen the bolts to the sensor bracket if your Honda Prelude has a Crankshaft Speed Fluctuation sensor. Move the sensor so that it is out of the way and cover it up with a towel to keep coolant off of it.

5

Remove the bolts and take out the water pump. Replace the pump, tightening the bolts to 108-inch lbs. Make sure to clean the surfaces before installing and install a new o-ring to the new water pump.

6

Install the new timing belt, fitting and adjusting it to proper position.

7

Replace the CKF Sensor if applicable and tighten the bolts to 108-inch lbs. Also install the crankshaft pulley, the lower belt cover, the upper timing belt cover, the accessory drive belts and the valve cover.

8

Reconnect the negative battery cable and enter the radio security code.

9

Refill the coolant. Start the engine and check for leaks when it reaches normal operating temperatures.

2.7L Prelude Engine

10

Disconnect the negative battery cables and drain the coolant from the radiator.

11

Remove the timing belt cover, the timing belt and the timing belt tensioner.

12

Loosen and remove the 9 water pump bolts and remove the pump from the engine. Also remove the dowel pins and remove the o-ring and throw it away.

13

Clean the o-ring groove of the water pump mounting surface and the surface itself. Reinstall the dowel pins.

14

Replace with a new o-ring and install the water pump, tightening the 8mm bolts to 16 foot pounds. and the 6mm bolts to 108-inch pounds. Rotate the pump by hand to make sure that it moves freely.

15

Reinstall all components in the order in which they were removed.
Clean the water pump mounting surface and o-ring groove and then install the dowel pins to the engine.

16

Reconnect the negative battery cable and enter the radio security code.

17

Refill the coolant. Start the engine and check for leaks when it reaches normal operating temperatures.