The Honda 15631-ZG3-000 Oil Filler Extension is a genuine OEM replacement designed for GD320 and GD410 horizontal shaft diesel engines. As a direct OEM component, this part is manufactured to Honda's exact specifications, ensuring a proper fit with no guesswork. This Oil Filler Extension is the correct replacement for both GD-series diesel models — confirm your engine's serial number against the fitment table before ordering, as Honda supersedes parts at serial breaks.
Key Features
- Genuine OEM Construction — manufactured by Honda to the same specification as the original, ensuring dimensional accuracy for a proper, rattle-free fit in the oil filler port
- Designed for GD-Series Diesel Engines — built specifically for GD320 and GD410 horizontal shaft diesel engines; correct part geometry matters when routing filler access on these compact powerplants
- Serial Number Verification Recommended — Honda updates parts at production serial breaks, so cross-check your engine's serial number against the fitment table to confirm this is the right extension for your unit
- Maintains Clean Oil Service — a correctly fitted extension keeps the filler path secure and properly sealed, preventing contamination during oil fills and reducing the risk of spills near hot engine surfaces
The Oil Filler Extension is a tubular fitting that extends the engine's oil filler neck, making the filler cap more accessible in tight installation environments where the standard filler port would otherwise be difficult to reach. On the GD320 and GD410 diesel engines — which are frequently installed in compact equipment where space around the engine is limited — this extension allows operators to check and top up oil without removing surrounding components. A damaged or missing extension makes routine oil maintenance awkward and increases the risk of introducing dirt into the crankcase during servicing.
Part Details
| Part Number | 15631-ZG3-000 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Oil Filler Extension |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Diesel Engine | GD320, GD410 | All |
Verify Before You Order
Fitment is machine-number and revision-specific; always confirm your model and serial number against the fitment list.
Why Buy From DHS Equipment
Every part is verified against the manufacturer's part number before it ships, so what you order is what arrives. We carry parts from leading OEM brands and our own DHS Quality Parts line of professional aftermarket components. Need help finding the right part? Our team is available to confirm compatibility whenever you need it. Orders are processed fast to keep your jobs on track. We don't just sell parts. We keep you jobsite ready.
Questions? Contact our team at [email protected] or 866-611-9369 — DHS Equipment is here to help you maintain peak performance.
