Kawasaki Ninja Service Manual: Radiator Cap Inspection

Kawasaki Ninja Service Manual / Cooling System / Radiator / Radiator Cap Inspection

Remove: Radiator Cap (see Coolant Change in the Periodic Maintenance chapter)
Check the condition of the bottom [A] and top [B] valve seals and valve spring [C].

If any one of them shows visible damage, replace the cap with a new one.

Radiator Cap Inspection

Install the cap [A] on a cooling system pressure tester [B].

NOTE

Wet the cap sealing surfaces with water or coolant to prevent pressure leaks.

Radiator Cap Inspection

Watching the pressure gauge, pump the pressure tester to build up the pressure until the relief valve opens: the gauge needle flicks downward. Stop pumping and measure leak time at once. The relief valve must open within the specified range in the table below and the gauge hand must remain within the same range at least 6 seconds.

Radiator Cap Relief Pressure Standard: 112 ∼ 142 kPa (1.14 ∼ 1.45 kgf/cm², 16 ∼ 21 psi)

If the cap can not hold the specified pressure or if it holds too much pressure, replace it with a new one.

Radiator Inspection

Remove the radiator (see Radiator and Radiator Fan Removal). Check the radiator core. If there are obstructions to air flow, remove them. If the corrugated fins [A] are deformed, carefully s ...

Radiator Filler Neck Inspection

Remove: Radiator Cap (see Coolant Change in the Periodic Maintenance chapter) Check the radiator filler neck for signs of damage. Check the condition of the top and bottom sealing seats [ ...

Other materials:

Piston Ring, Piston Ring Groove Wear Inspection
Check for uneven groove wear by inspecting the ring seating. The rings should fit perfectly parallel to groove surfaces. If not, replace the piston and all the piston rings. With the piston rings in their grooves, make several measurements with a thickness gauge [A] to determine pisto ...

ESD Actuator Input Voltage Inspection
NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. Disconnect the ESD actuator connector and connect a suitable measuring leads [A] between these connectors as shown. Main Harness [B] ESD Actuator [C] Connect the peak voltage adapter [D] and a digital ...

Oil Cooler Installation
Replace the O-ring [A] with a new one. Apply grease to the new O-ring. Install the water hoses and hose clamps [A] as shown in the figure. Water Hose (About 300 mm, 11.8 in.) [B] Water Hose (About 130 mm, 5.1 in.) [C] Yellow Paint [D] Tighten: Torque - Water Hose Clamp S ...