Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999), featuring a compact design with a black seal.
Technical diagram of a piston pump for Honda Acty Truck HA3, HA4 models, 1990-1999, showcasing detailed parts and assembly layout.
Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) featuring a compact design with black sealing ring.
Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) with a compact design and durable construction.
Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) with black seal.
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Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999), featuring a compact design with a black seal.Technical diagram of a piston pump for Honda Acty Truck HA3, HA4 models, 1990-1999, showcasing detailed parts and assembly layout.Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) featuring a compact design with black sealing ring.Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) with a compact design and durable construction.Silver piston pump for Honda Acty Truck HA3, HA4 models (1990-1999) with black seal.

Oil Passage Orifice Assembly - Honda Acty Truck HA3, HA4 Models - 1990-1999

Oiwa Garage
No reviews
Price:
$29.78
Stock:
In stock

Need help? Call or Text: 562-661-8862

Description

This is the Honda Oil Passage Orifice Assembly for the Honda Acty HA3, HA4 (1990-1999). It is a small calibrated oil restrictor inside the engine block oil passage that controls how much oil flows through, keeping oil pressure and lubrication correct - think of it as a small oil-flow regulator.

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.

Honda Acty Truck HA3, HA4 (1990-1999) - fitment
Make Honda
Model Acty Truck
Chassis Codes HA3, HA4
Years 1990-1999
Part Type oil passage orifice assembly

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 oil passage orifice assembly

  • Low oil pressure
  • A noisy top end on startup
  • You are doing an engine rebuild
  • A worn or clogged orifice

Features & Function

  • Meters oil flow through the engine block passage
  • Correct orifice for the E07A
  • Restores oil pressure

Installation Specifications

  • Difficulty: Advanced.
  • Estimated time: part of engine or timing work.
  • Required tools: A socket set and engine hand tools.

Oiwa Garage Tech Note

"It installs in the cylinder block oil passage near the lower front of the block, as part of the engine lubrication system. USA Honda catalogs list comparable 15140-series parts as Orifice Assy., Oil Passage or Orifice Assy., Oil Control."

Frequently Asked Questions

What does this part actually do?

It is a calibrated orifice that meters oil flow through a block passage to keep oil pressure and lubrication correct - a restrictor, not a moving pump part.

Where does it install?

In the cylinder block oil passage, near the lower front of the block, as part of the engine lubrication system.

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

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