The Honda 91202-ZG4-003 Oil Seal (31X80X10) is a genuine OEM component designed for the GD320 horizontal shaft diesel engine. As a direct Honda OEM part, it is manufactured to the same specification as the seal installed at the factory, ensuring a proper fit without modification. Buyers should confirm their engine serial number against the fitment table to verify that part number 91202-ZG4-003 is the correct listing for their GD320 build.
Key Features
- OEM Oil Sealing Integrity — genuine Honda construction ensures the seal maintains the lip geometry and dimensional tolerances needed to keep oil in and contaminants out under diesel engine operating loads.
- Exact Dimensional Fit — the 31X80X10 size designation identifies this seal's inner diameter, outer diameter, and width exactly; confirm these dimensions match your application before installation.
- GD320 Diesel Fitment — listed for the GD320 horizontal shaft diesel engine; check your serial number against the fitment table, as Honda supersedes seals at serial breaks.
- Leak Prevention — a worn or damaged oil seal allows oil to escape past a rotating shaft, leading to oil loss and potential engine damage; replacing it promptly restores the sealed system.
An oil seal is a precision lip seal fitted around a rotating shaft to retain engine oil within the crankcase while blocking dirt and moisture from entering. On a diesel engine such as the GD320, the crankshaft turns continuously under load, and the sealing lip must maintain consistent contact with the shaft to prevent leakage. When the seal hardens, tears, or loses its lip tension with age and heat cycles, oil begins to seep past the shaft — a condition that will progressively worsen and can lead to low oil levels and internal wear if the seal is not replaced.
Part Details
| Part Number | 91202-ZG4-003 |
|---|---|
| Brand | Honda |
| Part Type | Genuine OEM |
| Description | Oil Seal (31X80X10) |
Compatibility & Fitment
| Name | Models | Serial Range |
|---|---|---|
| Horizontal Shaft Diesel Engine | GD320 | 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.
