Spark Plug X52404500056 X52404500062 for MTU Engine 4000

Product Specifications

Compatible Models

Frequent Engine Misfires on Your MTU 4000? Confirm You’re Using the Right Spark Plug for MTU 4000 L61

MTU-powered generator sets and marine propulsion systems suffer costly downtime when spark plugs fail prematurely—especially under continuous high-load operation. Operators report repeated misfires, hard starts, and unexplained power loss after installing non-certified or dimensionally inconsistent plugs. OEM lead times of 3–4 weeks delay critical repairs, while counterfeit units often last less than half the service interval.

OEM-Equivalent Quality, Ready to Ship

This MTU 4000 spark plug is engineered to match original specifications in heat range, electrode gap, thread pitch, and seating torque. Produced in ISO 9001-certified facilities, every batch undergoes pre-shipment resistance testing, dielectric strength verification, and cold-start simulation. With Guangzhou XUNPO’s 10-year export experience serving 120+ countries, we supply this part to repair centers maintaining MTU 16V4000L61 engines across power generation, marine, and mining applications—no guesswork, no delays.

Where This Part Works

This spark plug operates reliably in demanding environments: diesel-electric generator sets at remote mining sites, marine auxiliary engines on offshore support vessels, and prime-power installations in tropical port infrastructure. It withstands sustained cylinder pressures up to 150 bar and combustion temperatures exceeding 2,200°C. Correct selection is essential—not only for ignition consistency but also to prevent pre-ignition damage to pistons and valves in high-compression MTU 4000 series engines.

Engineering Details That Matter

The center electrode uses iridium-enhanced nickel alloy for extended thermal stability and resistance to erosion over 12,000+ operating hours. The insulator is high-purity alumina ceramic (95% Al₂O₃), rated for dielectric strength ≥25 kV at 25°C—critical for preventing arcing in humid or salt-laden air. Thread specification is M14×1.25 mm with a tapered seat design matching MTU’s factory torque requirement of 25–30 N·m. Gap is factory-set to 0.7–0.8 mm and verified with digital calipers before packaging. Surface finish meets ISO 4287 Ra ≤0.8 μm to ensure consistent sealing against combustion gases.

The Real Cost of Wrong Parts

A $12 counterfeit spark plug may save upfront—but causes misfires that trigger ECU fault codes, increase fuel consumption by 8–12%, and accelerate carbon buildup on intake valves. In generator applications, repeated failures risk blackouts during peak demand, incurring contractual penalties averaging $2,500/hour. Genuine OEM-equivalent parts like this MTU 4000 spark plug reduce total cost of ownership (TCO) by extending service intervals, avoiding secondary damage, and ensuring compliance with MTU’s maintenance documentation requirements. Our units meet ISO 6922-2 and SAE J1331 standards for ignition components.

Why Customers Trust XUNPO

Packaging & Shipping

• Individually sealed in anti-static blister packs with molded EPE foam and printed retail carton
• In-stock items shipped within 2–5 working days from Guangzhou warehouse
• Flexible logistics: DHL/FedEx express (3–7 days), air freight (7–12 days), or sea freight (25–40 days)
• Real-time tracking number provided upon dispatch
• MOQ: 1 piece — designed for urgent field repairs and diagnostic replacements

Get Your MTU 4000 Spark Plug Now

Your MTU 16V4000L61 engine isn’t generating revenue while it’s offline. Send us your machine model, required quantity, and destination—we’ll reply within 24 hours with a competitive quote and availability confirmation. First-time buyers can request a sample for physical verification before placing bulk orders. Every minute counts when uptime matters.

Frequently Asked Questions