The original radio contains a coded anti-theft circuit. Obtain the security code number before disconnecting the battery cables.

Removal

1. Disconnect the negative battery cable.
2. Drain the cooling system.
3. Remove the accessory drive belts, the valve cover, and the upper timing belt cover.
4. Set the timing at Top Dead Center (TDC)/compression for No. 1 piston.
5. Remove the crankshaft pulley and lower timing belt cover.
6. Remove the timing belt. Replace the timing belt if it is contaminated with oil or coolant or shows any signs of wear and damage.
7. If equipped with a Crankshaft Speed Fluctuation (CKF) sensor at the crankshaft sprocket, unbolt the sensor bracket and move the sensor out of the way. Cover the sensor with a shop towel to keep coolant off of it.
8. Unbolt the water pump and remove it from the engine block. On 1.6L engines, the top right water pump mounting bolt also secures the alternator adjusting bracket. Leave the bracket attached to the alternator.

Installation

1. Clean the water pump and O-ring mating surfaces before installation.
2. Install the water pump with a new O-ring. Coat only the bolt threads with liquid gasket and tighten them to 9 ft. lbs. (12 Nm). On 1.6L engines, tighten the bracket bolt to 33 ft. lbs. (44 Nm).
3. Install the timing belt. Be sure it is fitted and adjusted properly.
4. If equipped, install the CKF sensor and tighten the bracket bolts to 9 ft. lbs. (12 Nm).
5. Install the lower belt cover and crankshaft pulley.
6. Install the upper timing belt cover, the valve cover, and the accessory drive belts.
7. Be sure the cooling system drain plug is closed. Refill and bleed the cooling system.
8. Connect the negative battery cable and enter the radio security code.
9. Start the engine, allow it to reach normal operating temperature, and check for coolant leaks.

This is a simplified version of how to replace a water pump. The following video is quite complete:

YouTube

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