Honda CBR650 - Service manual > Thermostat

REMOVAL/INSTALLATION

Drain the coolant.

Remove the bolts [1] and thermostat cover [2].

Remove the thermostat [3] from the thermostat housing.

Installation is in the reverse order of removal.

TORQUE:
Thermostat cover bolt:
12 N*m (1.2 kgf*m, 9 lbf*ft)

NOTE:

• Install the thermostat with the air bleed hole [4] facing up, aligning the body ribs with the grooves of the thermostat housing.

Fill and bleed the cooling system.

INSPECTION

Visually inspect the thermostat [1] for damage.

Replace the thermostat if the valve stays open at room temperature.

Check the seal ring [2] for damage and replace if necessary.

Wear insulated gloves and adequate eye protection. Keep flammable materials away from the electric heating element.

Do not let the thermostat or thermometer [1] touch the pan, or you will get false reading.

Heat the water with an electric heating element to operating temperature for 5 minutes.

Suspend the thermostat [2] in heated water to check its operation.

THERMOSTAT BEGIN TO OPEN:
80 - 84ºC (176 - 183ºF)

VALVE LIFT:
8 mm (0.3 in) minimum at 95ºC (203ºF)

Replace the thermostat if it responds at temperatures other than those specified.

Radiator/cooling fan

PULL DOWN THE RADIATOR

• Perform this procedure, before removing the following:
  • Radiator
  • Exhaust pipe/muffler

Remove the following:

• Middle cowls (CBR650F/FA)
• Tank shroud A (CB650F/FA)

Remove the following:

• Radiator lower mounting bolt [1]
• Radiator lower stay mounting bolt [2]
• Radiator lower stay [3]

Remove the radiator upper mounting bolt [4] and release the radiator mounting rubber [5] from the boss [6] of the frame.

Pull off the heat guard rubber [7] and pull down the radiator [8].

Installation is in the reverse order of removal.

REMOVAL/INSTALLATION

Drain the coolant.

Pull down the radiator.

Release the fan motor 2P (Black) connector [1] from the stay and disconnect it.

Disconnect the siphon hose [1] and air breeding hose [2] from the radiator.

Disconnect lower radiator hose A [1] and lower hose B [2], then remove the radiator.

Installation is in the reverse order of removal.

Fill and bleed the cooling system.

DISASSEMBLY/ASSEMBLY

Disassemble and assemble the radiator as following illustration.

Radiator reserve tank

REMOVAL/INSTALLATION

Remove the exhaust pipe/muffler.

Remove the radiator reserve tank cap [1].

Remove the bolt [2] and release the boss [3] of the reserve tank [4] from the frame.

Disconnect the siphon hose [5] and drain the coolant.

Remove the reserve tank by pulling the overflow hose [6] out from the frame.

Installation is in the reverse order of removal.

TORQUE:
Radiator reserve tank mounting bolt:
12 N*m (1.2 kgf*m, 9 lbf*ft)

Fill the reserve tank with the recommended coolant.

See also: