Water Pump - Honda Acty Truck HA3, HA4 Models - 1990-1999

This water pump fits the Honda Acty Truck HA3, HA4 (1990-1999). It circulates coolant through the engine and radiator to control temperature.

Vehicle Fitment & Compatibility

Confirm your chassis code against the table below before ordering.

Signs you need this water pump

• Coolant weeping from the pump weep hole
• Overheating or a temperature that climbs
• A rough or noisy pump bearing
• You are already doing the timing belt

Features & Function

• Circulates coolant through the engine
• Correct pump for the E07A
• Restores reliable cooling

Installation Specifications

• Difficulty: Advanced.
• Estimated time: about 2 to 4 hours.
• Required tools: A socket set, a coolant catch pan, and belt-timing tools.

Frequently Asked Questions

Should I replace this with the timing belt?

Yes. The labor overlaps, so fitting the water pump during a timing belt job saves a repeat teardown.

Do I need to bleed the cooling system?

Yes. Refill and bleed the air out so the pump moves coolant and the engine does not overheat.

How do I test the water pump?

Look for coolant weeping from the pump weep hole and, with the belt off, feel the pulley for bearing play or roughness. A weep stain or a rough, noisy bearing means the pump is due.

Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.