Honda CBR650 - Service manual > Water pump

MECHANICAL SEAL INSPECTION

Remove the under cowl (CBR650F/FA only).

Check the bleed hole [1] of the water pump for signs of coolant leakage.

• A small amount of coolant weeping from the bleed hole is normal.
• Make sure that there are no continuous coolant leakage [2] from the bleed hole while operating the engine.

Replace the water pump body if necessary.

REMOVAL/INSTALLATION

NOTE:

• Place a clean oil pan under the engine because engine oil will flow out when removing the water pump body. Add the recommended engine oil to the specified level after installation.

Drain the coolant.

Remove the drive sprocket cover.

Support the motorcycle in an upright position on a level surface.

Disconnect the following from the water pump cover:

• Cylinder block-to-water pump hose [1]
• Water pump-to-cylinder head hose [2]

Loosen the cover bolt [1].

Remove the three mounting bolts [2] and water pump assembly [3].

Remove the thrust washer [1] and O-ring [2].

Remove the cover bolt [3], then separate the water pump cover [4] and water pump body [5].

Remove the O-ring [1] from the water pump cover groove and replace it a new one.

• Do not apply engine oil to the cover O-ring.

Installation is in the reverse order of removal.

TORQUE:
 Water pump mounting bolt:
  12 N*m (1.2 kgf*m, 9 lbf*ft)
 Water pump cover bolt:
  13 N*m (1.3 kgf*m, 10 lbf*ft)

NOTE:

• Do not disassemble the water pump body.
• Replace the O-rings with new ones.
• Apply engine oil to the water pump body O-ring [1].
• Align the water pump shaft groove with the oil pump shaft end by turning the water pump impeller.

Check the oil level.

Fill and bleed the cooling system.

Water hose joint B

REMOVAL/INSTALLATION

Drain the coolant.

Remove the throttle body.

Remove the bolts [1].

Remove the water hose joint B [2] from the cylinder block-to-water pump hose [3] Remove the O-ring [4].

Installation is in the reverse order of removal.

NOTE:

• Replace the O-ring with a new one.
• Do not apply engine oil to the O-ring.

Fill and bleed the cooling system.

Thermostat case assembly

REMOVAL/INSTALLATION

Remove the following:

• Radiator
• Exhaust pipe/muffler

Disconnect the following from the thermostat case joint:

• Lower radiator hose A [1]
• Lower radiator hose B [2]
• Oil cooler water hoses [3]

Remove the four bolts [4] and thermostat case assembly [5].

Remove the O-ring [1] from the thermostat case assembly [2].

Installation is in the reverse order of removal.

NOTE:

• Replace the O-ring with a new one.
• Do not apply engine oil to the O-ring.

Fill and bleed the cooling system.

See also: