Description
This timing belt idler pulley fits the Honda Acty Truck HA3, HA4 (1990-1999). It guides the timing belt and keeps it tracking true.
In Stock - ships from our California (USA) warehouse
Fast, reliable delivery - no overseas backorder wait.
Vehicle Fitment & Compatibility
Confirm your chassis code against the table below before ordering.
100% Fitment Guarantee
Not sure about fit? Add your chassis/VIN number at checkout and we confirm it before we ship. If a part does not fit your Acty, we exchange it or refund you in full.
Signs you need this timing belt idler pulley
- A whir or rumble from the timing cover
- Rough or notchy feel when you spin the pulley
- You are already doing the timing belt
- A seized or noisy old pulley
Features & Function
- Guides the timing belt
- Smooth bearing for quiet running
- Correct fit for the Acty timing system
Installation Specifications
- Difficulty: Advanced.
- Estimated time: about 2 to 4 hours with the belt.
- Required tools: A socket set and belt-timing tools.
Oiwa Garage Tech Note
"Replace the idler with the belt - a fresh belt on a worn, noisy pulley is a false economy. Spin the new pulley to feel it runs smooth before fitting."
Frequently Asked Questions
How do I test the timing belt idler pulley?
With the belt off, spin the pulley by hand. Any roughness, notchiness, or noise means the bearing is worn - a whir from the timing area with the engine running is the audible sign.
What happens if the idler pulley seizes?
A dry idler bearing gets noisy, then lets the timing belt wander or shred and strand the truck - which is why it goes in fresh with every belt change.
Does the idler pulley set the belt tension?
No - the tensioner sets the tension; the idler just guides and backs the belt. Both wear, so they go in together during a belt job.
Fitment verified by the Kei truck specialists at Oiwa Garage · Listing updated June 2026.