The Wacker Neuson is a genuine OEM Valve Stem Seal designed for the GS6503G, GS6500G, GS8003G, GS8000G, GS10003G, and GS16000G LA generator series. As a factory-sourced component, it is manufactured to the exact material and dimensional standards Wacker Neuson specifies for these machines. Confirmed fitment spans the full range of GS-series generators listed above, giving you confidence you're ordering the right part the first time. Keep a spare on hand for scheduled valve service to maintain clean combustion and consistent engine output.
Key Features
- OEM-Grade Seal Material — Manufactured to Wacker Neuson's specified elastomer grade, ensuring the correct compression set and heat tolerance for sustained valve train performance.
- Drop-In Valve Train Fitment — Engineered to seat directly onto the valve stem without modification, maintaining the correct interference fit for an effective oil-to-combustion seal.
- Broad GS-Series Compatibility — Covers GS6503G, GS6500G, GS8003G, GS8000G, GS10003G, and GS16000G LA generator models in a single part number.
- Prevents Oil Consumption and Smoke — A correctly seated valve stem seal stops engine oil from being drawn past the valve guide, keeping combustion clean and exhaust clear.
- Fuel System and Emissions Integrity — A worn or failed valve stem seal allows oil into the combustion chamber, which can foul spark plugs, increase emissions, and accelerate engine wear — making timely replacement a straightforward maintenance priority.
A valve stem seal wraps around the stem of each intake and exhaust valve where it passes through the cylinder head guide. Its job is to meter and restrict how much oil lubricates the valve stem, preventing excess oil from being drawn into the combustion chamber during the engine's intake stroke. When the seal hardens, cracks, or wears, oil passes freely into the combustion chamber, producing blue smoke at startup or under load, fouling spark plugs, and steadily increasing oil consumption. Replacing the seal restores the correct lubrication balance and protects the valve guides and combustion chamber from the damage that unchecked oil entry causes over time.
Part Details
| Part Number | 5000408609 |
|---|---|
| Old Part Number | 0408609 |
| Brand | Wacker Neuson |
| Part Type | Genuine OEM |
| Description | Valve Stem Seal |
Compatibility & Fitment
| Name | Model | Machine Number |
|---|---|---|
| GS6503G | GS6503G CE | 5100079454 |
| GS6500G | GS6500G LA | 5100079455 |
| GS8003G | GS8003G CE | 5100079456 |
| GS8000G | GS8000G LA | 5100079457 |
| GS10003G | GS10003G (No-CE) | 5100079458 |
| GS8003G | GS8003G CN | 5100079599 |
| GS16000G LA | GS16000G LA | 5100082407 |
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.
