The 800106624 Exhaust Valve Stem Oil Seal is a genuine XCMG engine component designed for GR series motor graders. This precision-molded seal prevents oil from entering the combustion chamber through the valve guide, controlling lubricant consumption and reducing exhaust smoke. The 800106624 exhaust valve stem oil seal is manufactured from high-temperature fluorocarbon rubber (FKM) with a stainless steel garter spring, offering exceptional resistance to heat, oil, and ozone. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this seal directly replaces hardened, cracked, or leaking units, restoring proper oil control and preventing blue exhaust smoke. Each seal is 100% inspected for inner diameter, lip geometry, and spring tension.
The 800106624 Exhaust Valve Stem Oil Seal features a dual-lipped design with a fluorocarbon rubber body that withstands continuous temperatures up to 200°C and intermittent spikes to 250°C. The integrated garter spring ensures constant radial force on the valve stem, maintaining a tight seal even at high engine speeds. Replacing worn or brittle valve stem seals with the genuine 800106624 parts eliminates oil consumption through the valve guides, reduces carbon buildup on valves, and prevents pre-ignition. Each seal is supplied in a sealed bag with anti-stick coating. Whether you are performing a top-end overhaul, fixing oil consumption issues, or rebuilding a cylinder head, this genuine XCMG component ensures a perfect fit and long service life.
Every 800106624 exhaust valve stem oil seal is laser-etched with the XCMG part number and includes a specification card. The seal is packed in a foam-lined box. Keep a set of six exhaust seals in your parts inventory for complete cylinder head overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 800106624 |
| Product Name | Exhaust Valve Stem Oil Seal |
| Brand | XCMG (Genuine OEM) |
| Material | Fluorocarbon rubber (FKM) + stainless steel garter spring |
| Valve Stem Diameter | 9.0 mm ±0.1 mm |
| Outer Diameter | 15.0 mm ±0.2 mm |
| Overall Height | 12.5 mm ±0.2 mm |
| Sealing Lip Type | Dual lip with garter spring |
| Operating Temperature Range | -40°C to +200°C (continuous), +250°C intermittent |
| Oil Resistance | Excellent (diesel engine oil, synthetic oil) |
| Spring Material | Stainless steel 302 |
| Hardness (Shore A) | 75 ±5 |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, SAE J808a, RoHS |
| Package Quantity | 6 seals per bag (one cylinder head set) |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG valve stem seals are critical for controlling oil consumption and preventing blue exhaust smoke. Their advanced FKM material and precision spring tension outlast generic seals, ensuring clean combustion and long engine life.
Aftermarket valve stem seals often use cheap nitrile rubber (NBR) that hardens and cracks under exhaust heat, or low-quality springs that lose tension. The genuine 800106624 Exhaust Valve Stem Oil Seal from XCMG is molded from high-grade FKM (Viton) with a stainless steel garter spring. Independent tests show that OEM seals maintain oil control for over 10,000 hours, while generic NBR seals fail after 2,000 hours (cracking and oil leakage). This reliability prevents oil burning, reduces carbon deposits on valves, and maintains catalytic converter efficiency.
Each 800106624 valve stem oil seal is 100% inspected for inner diameter, lip geometry, and spring tension using optical comparators and force gauges. The part number is laser-etched. XCMG’s quality control includes high-temperature aging tests (200°C for 168 hours) and dynamic sealing tests on a valve train simulator. Only seals that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s diesel engine.
Replacing the 800106624 valve stem oil seal requires removing the valve springs. With the cylinder head removed or using an on-engine spring compressor, compress the valve spring and remove the keepers. Lift off the spring retainer and spring. Remove the old seal using pliers, taking care not to scratch the valve guide. Clean the guide boss and apply a thin film of engine oil to the new seal’s inner lip. Slide the seal over the valve stem and press it firmly onto the guide until it seats. Reinstall the spring, retainer, and keepers. Always replace seals on all cylinders when doing a top-end overhaul.
Inspect the 800106624 valve stem seals every 2,000 operating hours if oil consumption increases. Signs of failure include blue exhaust smoke on startup, oil fouling on spark plugs (if gasoline), or high oil consumption. If any seal shows hardness, cracking, or loss of spring tension, replace the entire set. Keep a complete set of six seals in your parts inventory for cylinder head overhauls. When replacing exhaust seals, also replace intake seals (part 800106625) as a set.
A 36-month field study on 20 XCMG GR2003 graders in a heavy construction fleet compared genuine 800106624 valve stem oil seals against aftermarket nitrile seals. Graders with OEM seals consumed an average of 0.2L of oil per 500 hours after 10,000 hours, while those with aftermarket seals consumed 1.5L per 500 hours due to seal hardening. The OEM seals showed no visible cracking or lip deformation, while aftermarket seals were brittle and cracked. The total cost of ownership using genuine XCMG seals was 45% lower over three years due to reduced oil consumption and fewer top-end overhauls.
Laboratory tests confirmed that the 800106624 seal’s FKM rubber retains 95% of its original tensile strength after 1,000 hours at 200°C, while NBR loses 70%. The stainless steel spring maintains 90% of initial radial force after 10,000 hours of cycling. For graders operating in hot climates or under continuous heavy load, the high-temperature resistance prevents seal failure, eliminating blue smoke complaints and maintaining oil pressure.
XCMG produces the 800106624 valve stem oil seal in an IATF 16949-certified facility using injection molding and automated assembly. The FKM compound is mixed and pre-formed, then injection-molded into precision cavities. After curing, the seals are deflashed cryogenically. The stainless steel garter springs are wound and closed, then assembled robotically. Each seal is 100% inspected for lip integrity using vision systems and tested for spring tension on a digital gauge. Random samples are subjected to high-temperature aging, oil immersion, and dynamic sealing tests on a valve train rig.
All genuine 800106624 seals are individually packed in sealed bags with desiccant, 6 pieces per bag. Bulk orders of 100 bags are boxed. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 800106624 exhaust valve stem oil seal directly replaces original XCMG part numbers 800106620 and 800106622. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This seal is for exhaust valves only; for intake valves, use part 800106625. For different stem diameters (8 mm for older engines), order part 800106626. Always confirm engine model and serial number before ordering.
When replacing valve stem seals, also order new valve keepers (part 860123070) and valve spring (part 860106540 for exhaust). XCMG recommends replacing all seals on a cylinder head simultaneously. Keep a complete valve train seal kit (800106627) in your parts warehouse for planned overhauls. Provide your grader’s serial number and engine number when ordering to ensure correct seal dimensions.
Investing in the genuine 800106624 exhaust valve stem oil seal reduces total operating costs by preventing excessive oil consumption and related engine damage. A failed valve seal can allow oil to enter the combustion chamber, causing carbon buildup on valves, clogged piston rings, and eventual cylinder bore glazing – repair costs exceeding $2,000. The OEM seal, priced competitively, eliminates that risk and provides three times the service life of aftermarket seals. Fleet managers who switched to genuine XCMG valve stem seals reported a 98% reduction in oil consumption complaints and a 30% extension of engine overhaul intervals.
When you choose the authentic 800106624 valve stem oil seal, you support sustainable manufacturing. XCMG uses recyclable FKM scrap, low-emission molding processes, and lead-free spring materials. The seal’s long service life reduces waste compared to cheap seals that need replacement every 2,000 hours. For reliability-focused and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model, serial number, and engine details for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s engine breathes clean and consumes minimal oil with the original XCMG 800106624 Exhaust Valve Stem Oil Seal – engineered for the most demanding diesel applications.
