Water Pump Inspection
Check the water pump drainage outlet hose [A] at the
bottom of the water pump for coolant leakage.
If the mechanical seal is damaged, the coolant leaks
through the seal and drain through the passage. Replace
the mechanical seal.
Visually inspect the impeller [A].
If the surface is corroded, or if the blades are damaged,
replace the impeller.
Mechanical Seal Replacement
Remove the water pump impeller (see Water Pump Re-
Pry the mechanical seal flange off with a small chisel [A].
Pull the mechanical seal out of the right crankcase with
needle nose pliers. Discard the mechanical seal.
Be careful not to damage the water pump shaft and
the inner sealing surface of the crankcase.
Since the replacement mechanical seal has an adhe-
sive coated body, do not apply a liquid gasket to the
exterior surface of the body.
Press [A] the mechanical seal [B] by using a suitable 28
mm socket [C] and a bearing driver [D] until its flange
touches the step [E].
Special Tool - Bearing Driver Set: 57001-1129
If the coolant still leaks through the drainage outlet hose,
the seal and ball bearings is probably damaged. Replace
the mechanical seal, ball bearings, and oil seal by splitting
Split the crankcase (see Crankshaft/Transmission chap-
Remove the water pump impeller.
Pull out the water pump shaft from the inside of the right
Take the bearing [A] out of the right crankcase, using the
Special Tools - Bearing Remover Shaft: 57001-1265 [B]
Bearing Remover Head:, 10 × 12: 57001
COOLING SYSTEM 3-13