TOYOTA 16100-0H040 Engine Water Pump Assembly | For Camry 1AZ/2AZ Engine

1. Ensure the engine is completely cool. Disconnect the negative battery terminal and drain the cooling system coolant into a clean container.
2. Remove the accessory belt, timing cover (if necessary), and any components blocking access to the water pump.
3. Unbolt the old water pump from the engine block, remove it, and clean the mounting surface to remove old gasket residue.
4. Install the new 16100-0H040 water pump with a new gasket. Tighten the mounting bolts to Toyota's recommended torque (20 N·m) <superscript id="37">5.
5. Reinstall all removed components, refill the cooling system with recommended coolant, and bleed air from the system.
6. Reconnect the battery, start the engine, and check for leaks or abnormal noises; confirm the temperature gauge stays within the normal range.

Maintenance Tips

• Inspect the water pump every 40,000 km: Check for coolant leaks, bearing play, and damaged belts. Replace immediately if any issues are found <superscript id="43">7.
• Replace the water pump together with the timing belt (if equipped) and accessory belt to avoid repeated disassembly.
• Use only Toyota-recommended coolant to prevent seal degradation and corrosion of the water pump and cooling system components.
• Avoid driving when the engine overheats — stop immediately and let the engine cool to prevent irreversible damage <superscript id="47">4.