Remove the timing belt (see page 6-18). Turn the water pump pulley counter-clockwise. Check that it turns freely. Check for signs of seal leakage. A small amount of ''weeping'' from the bleed hole (A) is normal.

Remove the timing belt (see page 6-18). Remove the water pump (A) by removing four bolts. Inspect and clean the O-ring groove and mating surface with the cylinder block. Install the water pump with a new O-ring (B) in the reverse order of removal. Clean up any spilled engine coolant.