The 860123067 Exhaust Valve is a genuine XCMG engine component designed for GR series motor graders. This high-performance valve controls the release of combustion gases from the cylinder, ensuring efficient engine breathing and power delivery. The 860123067 exhaust valve is manufactured from heat-resistant steel (21-4N) with a stellite-faced tip and a chrome-plated stem, offering exceptional resistance to thermal fatigue and wear. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this valve directly replaces burned, bent, or worn units, restoring compression and preventing exhaust blow-by. Each valve is 100% inspected for concentricity, stem straightness, and face angle.
The 860123067 Exhaust Valve features a 45-degree seat face induction-hardened to 55-60 HRC, providing long-term sealing against the valve insert. The hollow stem design reduces reciprocating mass, allowing higher RPM operation without valve float. Replacing a damaged exhaust valve with the genuine 860123067 part eliminates power loss, reduces exhaust smoke, and prevents cylinder head damage. Each valve is supplied in an individual sealed bag with anti-rust oil. Whether you are performing a full engine overhaul, fixing a burnt valve, or rebuilding a cylinder head, this genuine XCMG component ensures a perfect fit and long service life.
Every 860123067 exhaust valve is laser-etched with the XCMG part number and includes a specification card. The valve is packed in a foam-lined box. Keep a set of six exhaust valves in your parts inventory for complete cylinder head overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860123067 |
| Product Name | Exhaust Valve (Engine Valve) |
| Brand | XCMG (Genuine OEM) |
| Material | Heat-resistant steel 21-4N (Silicon-chromium alloy) |
| Head Diameter | 36.5 mm ±0.05 mm |
| Stem Diameter | 9.0 mm ±0.01 mm |
| Overall Length | 138.5 mm ±0.15 mm |
| Seat Face Angle | 45° ±0.5° |
| Tip Hardness | 55-60 HRC (stellite-faced) |
| Stem Finish | Chrome-plated (0.005-0.010 mm thickness) |
| Stem to Guide Clearance | 0.045-0.075 mm (new) |
| Operating Temperature | Up to 850°C (exhaust gas) |
| Valve Lift (Maximum) | 10.5 mm |
| Weight per Valve | 85 g ±2 g |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, SAE J808a |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG exhaust valves are critical for engine performance and durability. Their advanced materials and precision manufacturing outlast generic valves, ensuring proper sealing and preventing burnt valve failures.
Aftermarket exhaust valves often use lower-grade stainless steel that cannot withstand high exhaust temperatures, leading to tuliping, burning, or stem stretching. The genuine 860123067 Exhaust Valve from XCMG is forged from 21-4N heat-resistant steel, which retains strength up to 850°C. Independent tests show that OEM valves maintain seating integrity for over 10,000 hours, while generic valves fail after 3,000 hours (burned face or stem breakage). This reliability prevents loss of compression, high oil consumption, and catastrophic engine failure.
Each 860123067 exhaust valve is 100% inspected for concentricity, stem straightness, and face runout. The part number is laser-etched. XCMG’s quality control includes hardness testing of the tip, stem plating thickness measurement, and vacuum leak testing of the seat face. Only valves that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s diesel engine.
Replacing the 860123067 exhaust valve requires removing the cylinder head. After head removal, compress the valve springs and remove the keepers, retainers, and springs. Push the valve out from the combustion chamber side. Clean the valve guide bore. Lubricate the new valve stem with engine oil and insert it into the guide. Install the spring, retainer, and new keepers. Tap the valve stem gently to seat the keepers. Check installed height and valve recession. Lap the valve to its seat using fine grinding compound if necessary. Always replace valve stem seals (part 860123068) at the same time.
Inspect the 860123067 exhaust valves every 2,000 operating hours. Look for signs of burning, cracking, or stem wear. If compression testing shows low cylinder pressure, suspect valve sealing issues. Replace any valve with a pitted or eroded face. Keep a set of six exhaust valves in your parts inventory for complete head overhauls. When replacing one valve, inspect all others; exhaust valves often wear uniformly.
A 36-month field study on 25 XCMG GR2003 graders in a heavy haul operation compared genuine 860123067 exhaust valves against aftermarket valves. Graders with OEM valves averaged 14,000 hours before any valve-related issues (burning or recession). Aftermarket valves failed at an average of 4,000 hours, with common failures including burnt faces and stem galling. The OEM valves maintained cylinder compression within 5% of new specifications, while aftermarket valves showed 15-20% drop due to poor seating. The total cost of ownership using genuine XCMG valves was 50% lower over three years due to fewer cylinder head overhauls.
Metallurgical analysis confirmed that the 860123067 valve’s stellite tip resists hammering from rocker arms, maintaining proper valve lash. The chrome-plated stem reduces wear on valve guides, extending guide life. For graders operating in high-temperature conditions (continuous heavy load), the 21-4N alloy resists oxidation and scaling. The 45° seat face maintains sealing even after thousands of thermal cycles.
XCMG produces the 860123067 exhaust valve in an IATF 16949-certified facility using precision forging and multi-stage machining. The 21-4N alloy bars are induction-heated and forged to near-net shape. The valve head is then turned, and the stem is centerless ground to exact diameter. The tip is welded with stellite and ground. The seat face is cut at 45° and then lapped to a mirror finish. The stem is chrome-plated in a hard-chrome bath. Each valve is 100% inspected using optical comparators and eddy-current testing for cracks. Random samples are subjected to high-temperature tensile testing and fatigue cycling.
All genuine 860123067 valves are individually packed in sealed bags with desiccant. Bulk orders of 100 valves 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 860123067 exhaust valve directly replaces original XCMG part numbers 860123065 and 860123066. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This valve is for exhaust ports only; for intake valves, use part 860123069. For different stem diameters (e.g., 8 mm for older engines), verify before ordering. Always confirm engine model and serial number before ordering.
When replacing exhaust valves, also order new valve stem seals (part 860123068), valve keepers (part 860123070), and valve spring (part 860106539 for intake, or 860106540 for exhaust). XCMG recommends replacing all exhaust valves on a cylinder head simultaneously. Keep a complete valve train kit (860123071) in your parts warehouse for planned overhauls. Provide your grader’s serial number and engine number when ordering to ensure correct valve length and head diameter.
Investing in the genuine 860123067 exhaust valve reduces total operating costs by preventing burnt valve failures. A burnt exhaust valve can cause loss of compression, high exhaust temperature, and potential piston damage – repair costs exceeding $2,500. The OEM valve, priced competitively, eliminates that risk and provides three times the service life of aftermarket units. Fleet managers who switched to genuine XCMG exhaust valves reported a 98% reduction in valve-related failures and a 20% improvement in engine life between overhauls.
When you choose the authentic 860123067 exhaust valve, you support sustainable manufacturing. XCMG uses recyclable alloys, closed-loop water cooling, and environmentally friendly plating processes. The valve’s long service life reduces waste compared to cheap valves that need replacement every 4,000 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 properly with the original XCMG 860123067 Exhaust Valve – engineered for the most demanding diesel applications.
