Product Features

• Structure: Forged from high-strength heat-resistant alloy steel, with a polished stem and precision-machined valve head. The stem is treated with a nitride coating to enhance wear resistance and reduce friction with the valve guide.

• Performance: Ensures smooth, precise opening and closing to regulate the intake air flow. The alloy steel construction withstands high mechanical loads and temperature changes, maintaining a reliable seal to prevent air leakage.

• Design: Directly interchangeable with the original equipment valve, ensuring a perfect fit with the cylinder head and valve seat for optimal airflow and combustion efficiency.

Core Function

1. Air Intake Control: Opens and closes in sync with the engine’s four-stroke cycle to draw fresh air into the combustion chamber, supporting efficient fuel combustion.

2. Sealing: Maintains a tight seal against the valve seat when closed, ensuring maximum compression pressure for optimal engine power and fuel economy.

3. Durability: The nitride coating and high-alloy construction provide excellent resistance to wear and fatigue, extending service life in harsh construction machinery operating conditions.

Engine Valves D04-111-31В+В for SHANGCHAI Diesel Engines — Factory-Direct Supply

When your SHANGCHAI-powered fleet demands peak combustion efficiency and zero unplanned downtime, every valve seat matters. The Engine Valves D04-111-31В+В from METTLEAD Truck Parts deliver OEM-grade sealing performance, engineered to withstand the extreme thermal cycling and high-pressure demands of SHANGCHAI diesel engines. Sourced directly from our quality-controlled production lines in China, these valves arrive at your warehouse faster, priced leaner, and built tougher than aftermarket alternatives.

Why These Engine Valves Outperform in the Field

Precision-Engineered Sealing Surface

Each D04-111-31В+В valve is machined to tight tolerances, ensuring a gas-tight seal against the valve seat. This translates directly into optimal compression ratios, reduced blow-by, and consistent power output across thousands of operating hours.

Superior Heat Resistance

Manufactured from high-grade alloy steel with specialized heat treatment, these valves resist warping, pitting, and carbon buildup even under sustained high-temperature exhaust conditions — a critical factor for heavy-duty diesel applications running long hauls or continuous-load operations.

Extended Service Life

Hardened valve stems and precision-ground contact surfaces minimize wear against guides and seats. Fleet operators report service intervals that match or exceed OEM replacement schedules, reducing total cost of ownership per vehicle.

Direct-Fit Compatibility

Dimensionally identical to the original SHANGCHAI specification, the D04-111-31В+В drops into place without machining, shimming, or adapter modifications — saving your workshop hours on every engine rebuild.

Technical Specifications

Application Scenarios — Where These Valves Work Hardest

The Engine Valves D04-111-31В+В serve as critical combustion-chamber components across a wide range of SHANGCHAI-equipped vehicles and machinery:

• SANY, XCMG, and LIUGONG construction equipment — wheel loaders, excavators, and bulldozers running SHANGCHAI D6114 and SC series powerplants under continuous high-load cycles.
• SHACMAN and FOTON heavy-duty trucks — long-haul logistics fleets equipped with SHANGCHAI engines that demand reliable valve performance over 500,000+ km service life.
• SDLG and LONKING mining loaders — operating in dusty, high-vibration environments where valve integrity directly impacts uptime and fuel economy.
• Marine and generator-set applications — stationary and marine SHANGCHAI diesel engines requiring valves rated for sustained RPM operation without thermal fatigue.

Whether your fleet runs across African highways, Southeast Asian construction sites, or Middle Eastern oilfields, these valves are built to handle the punishment.

OEM/ODM Capability — Your Brand, Our Quality

White-Label & Custom Packaging

METTLEAD supports full white-label packaging for distributors building their own aftermarket brand. We print your logo, part numbers, and barcodes on individual boxes, cartons, and documentation — minimum order quantities are flexible for first-time partners.

Strict Quality Control Pipeline

Every batch of D04-111-31В+В valves passes through a multi-stage inspection process:

1. Raw material composition verification (spectrometer analysis)
2. Dimensional inspection at CNC machining stage (CMM measurement)
3. Heat treatment hardness verification (Rockwell testing)
4. Final visual and functional inspection before packaging

Flexible Order & Logistics

We accommodate mixed-container orders across our full SHANGCHAI engine parts catalog, helping you consolidate shipments and reduce per-unit freight costs. Standard lead time runs 7–15 days depending on stock status and order volume.

Frequently Asked Questions — Engine Valves D04-111-31В+В

What is the difference between the intake and exhaust valve in this set?

The exhaust valve in the D04-111-31В+В set features a stellite-hardened face and sodium-filled stem for superior heat dissipation, since it endures direct exposure to combustion gases at temperatures exceeding 700°C. The intake valve uses a slightly larger head diameter to maximize airflow into the cylinder, with a standard alloy-steel construction suited to its cooler operating environment.

Can these engine valves handle biodiesel or alternative fuel blends?

Yes. The alloy composition and surface treatments on the D04-111-31В+В are compatible with B20 biodiesel blends and standard diesel fuels. For higher biodiesel concentrations (B50+), we recommend shorter inspection intervals due to increased carbon deposit tendencies, but the valve metallurgy itself remains unaffected.

How do I verify this is the correct valve for my specific SHANGCHAI engine model?

Cross-reference the OEM part number D04-111-31В+В against your engine’s parts manual. This number covers multiple SHANGCHAI D-series variants. If you are unsure, send us your engine nameplate photo or serial number and our technical team will confirm fitment within 24 hours.

What causes premature engine valve failure, and how does this product prevent it?

The three primary failure modes are thermal fatigue cracking, seat recession from poor hardness, and stem wear from inadequate lubrication channels. The D04-111-31В+В addresses all three through its martensitic alloy base (thermal stability), stellite seat facing (recession resistance), and chrome-plated stem (wear reduction against valve guides).

Are these valves sold individually or as a complete engine set?

We offer both options. You can order individual intake or exhaust valves for targeted replacements, or request a full engine set (all intake + exhaust valves for one engine) at a volume-discounted price. Let us know your requirement and we will quote accordingly.

Ready to Secure Your Supply of D04-111-31В+В Engine Valves?

Procurement decisions in heavy-duty diesel parts come down to three things: quality you can trust, pricing that protects your margins, and delivery that keeps your rebuild schedule on track. METTLEAD delivers all three, backed by factory-direct sourcing and a dedicated export team that speaks your language.

Get your competitive quote today. Tell us your required quantity, preferred packaging, and destination port — we will respond with pricing, lead time, and shipping options within 12 business hours.

👉 Contact METTLEAD Truck Parts Now — our team is standing by to support your next order.

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