Mechanical Seal Inspection
Remove the impeller (see Water Pump Removal).
Visually inspect the mechanical seal.
If any one of the parts is damaged, replace the mechani-
cal seal as a unit.
The sealing seat and rubber seal may be removed easily
Impeller Sealing Seat Surface [A]
Rubber Seal [B]
Mechanical Seal Diaphragm [C]
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.
Replace the mechanical seal with a new one.
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 seal and ball bearing are damaged, replace the me-
chanical seal, ball bearing, and oil seal by splitting the
Split the crankcase (see Crankcase Splitting in the Crank-
Remove the mechanical seal.
Take the bearing [A] out of the left crankcase, using the
Special Tools - Bearing Remover Shaft [B]: 57001-1265
Bearing Remover Head 10 × 12 [C]: 57001
Using a thin-bladed screwdriver, pry out the oil seal [D].
COOLING SYSTEM 4-11