Motorcycle engine cooling system Kawasaki VN900 Vulcan (2006-2024)

Cooling system exploded view
No. Fastener Torque Remarks N·m kgf·m ft·lb 1 Water Pump Impeller Bolt 9.8 1.0 87 in·lb 2 Water Hose Fitting Bolts 9.8 1.0 87 in·lb 3 Water (Radiator) Hose Clamp Screws 2.0 0.20 18 in·lb 4 Thermostat Housing Cover Bracket Bolts 6.9 0.70 61 in·lb 5...

Cooling system specifications
Item Standard Service Limit Coolant Provided When Shipping Type Permanent type of antifreeze (soft water and ethylene glycol plus corrosion and rust inhibitor chemicals for aluminum engines and radiators) — Color Green — Mixed Ratio Soft water 50%,...

Special tools and sealant
Bearing Driver Set: 57001-1129 Bearing Remover Head, 10 x ∅12: 57001-1266 Bearing Remover Shaft, 9: 57001-1265 Kawasaki Bond (Silicone Sealant): 56019-120

Coolant flow chart
1. Thermostat; 2. Radiator Cap; 3. Cylinder Head Jacket; 4. Radiator Fan; 5. Radiator; 6. Cylinder Jacket; 7. Water Pump; 8. Reserve Tank; 9. Hot Coolant; 10. Cold Coolant Permanent type antifreeze is used as a coolant to protect the cooling system...

Coolant replacement and inspection
Coolant deterioration inspection Visually inspect the coolant in the reserve tank. ★ If whitish cotton-like wafts are observed, aluminum parts in the cooling system are corroded. If the coolant is brown, iron or steel parts are rusting. In either...

Reserve tank removal
Remove: Left Side Cover (see Left side cover removal in the Frame chapter) Bolt [A] Reserve Tank Cover [B] Remove: Bolts [A] Cap [B] Drain the coolant to the suitable container. Remove: Hose [C].

Water pump — removal and installation
Water pump impeller removal Drain: Engine Oil (see Engine oil change in the Periodic Maintenance chapter) Coolant (see Coolant change in the Periodic Maintenance chapter) Remove: Right Engine Cover (see Right engine cover removal in the Clutch...

Radiator and radiator fan — removal and installation
Radiator and radiator fan removal Warning! The radiator fan is connected directly to the battery. The radiator fan may start even if the ignition switch is off. NEVER TOUCH THE RADIATOR FAN UNTIL THE RADIATOR FAN CONNECTOR IS DISCONNECTED. TOUCHING...

Radiator inspection
Radiator inspection Check the radiator core. ★ If there are obstructions to air flow, remove them. ★ If the corrugated fins [A] are deformed, carefully straighten them. ★ If the air passages of the radiator core are blocked more than 20% by...

Thermostat — removal and installation
Thermostat removal Drain: Coolant (about 200 mL) Remove: Seat (see Seat removal in the Frame chapter) Fuel Tank (see Fuel tank removal in the Fuel System (DFI) chapter) Reserve Tank Hose [A] Radiator Hose Clamp [B] (Loosen) Water Temperature...

Hose and pipes
Hose installation Install the hoses and pipes being careful to follow bending direction or diameter. Avoid sharp bending, kinking, flattening, or twisting. Install the clamps [A] as near as possible to the hose end to clear the raised rib or the...

Water temperature sensor
Water temperature sensor removal/installation Caution! The water temperature sensor should never be allowed to fall on a hard surface. Such a shock to water temperature sensor can damage it. Refer to the Water temperature sensor Removal/Installation...