WP12 Engine

The WP12 Engine from Sinotruk represents the pinnacle of heavy‑duty diesel engineering, co‑developed with AVL and global suppliers. Designed for maximum torque, fuel efficiency, and long service life, the WP12 Engine powers thousands of trucks across the globe. With a robust block, advanced common‑rail injection, and optimized turbocharging, this engine delivers exceptional performance in the most demanding conditions. Whether you’re hauling freight across continents or tackling construction sites, the Engine ensures you stay on the road longer with minimal downtime.

High Power Density

The WP12 Engine produces up to 460 hp and 2110 Nm torque from 11.6L displacement. Power output ranges from 270 to 460 hp, with low‑speed torque (1000-1400 rpm) ensuring excellent acceleration and climbing ability.

Fuel Efficient

Advanced common‑rail injection and optimized combustion reduce fuel consumption by up to 5% compared to competitors. Lowest BSFC reaches ≤182 g/kW·h. Meets Euro III, IV, V emission standards with ease.

Durable Construction

B10 life exceeds 1,200,000 km. Wet cylinder liners, forged steel crankshaft, and four‑valve head ensure longevity. Passed 8,000+ hours bench test and 500万 km road test in extreme conditions.

Easy Maintenance

Modular design with service points on one side reduces downtime. Valve lash adjustment and oil changes are simple. NG versions feature long‑life spark plugs and maintenance‑free ignition system.

612630061073 WP12 Euro 5 Water Pump

OEM 612630061073 – High-quality Euro 5 compliant water pump, ensures efficient cooling.

612630090002 WP12 Nozzle Seat

OEM 612630090002 – Precision nozzle seat for WP12 fuel injectors, ensures optimal fuel atomization.

612630010070+71 Wp12 Crankshaft Ring

OEM 612630010070+71 – Set of 4 crankshaft rings, maintains proper end play.

612630010065 Wp12 Engine Oil Pan Gasket

OEM 612630010065 – Durable oil pan gasket, prevents leaks and ensures a tight seal.

WP12.375E50

Displacement: 11.596L

Power: 375 hp (276 kW) @ 1900 rpm

Torque: 1800 Nm @ 1000-1400 rpm

Emission: Euro V (SCR)

Ideal for 12-14m coaches and 14-18m buses.

WP12.400E50

Displacement: 11.596L

Power: 400 hp (294 kW) @ 1900 rpm

Torque: 1920 Nm @ 1000-1400 rpm

Emission: Euro V (SCR)

Perfect balance of power and economy for long‑haul trucks.

WP12.430E50

Displacement: 11.596L

Power: 430 hp (316 kW) @ 1900 rpm

Torque: 2060 Nm @ 1000-1400 rpm

Emission: Euro V (SCR)

High‑performance variant for heavy haul and mining.

WP12NG380E40

Displacement: 11.59L

Power: 380 hp @ 2200 rpm

Torque: 1500 Nm @ 1400-1600 rpm

Fuel: CNG/LNG

Spark‑ignited lean‑burn, lowest gas consumption <185 g/kW·h.

Heavy‑Duty Trucks

The WP12 Engine powers Sinotruk Howo and Sitrak series for long‑haul logistics, dump trucks, and tractor‑trailers. Its low‑end torque (950 rpm max torque available in newer versions) ensures effortless hill climbing. Over 600,000 units in service worldwide.

Construction & Mining

With reinforced block and high dust filtration, the WP12 Engine excels in off‑road environments. It powers excavators, loaders, and mining trucks with unwavering durability. Cold‑start capability down to -40°C with starting aid.

Proven Reliability

Over 1.2 million km B10 life. Field‑tested in extreme climates from -40°C to 50°C, 5000m altitude.

Genuine Parts

All components are OEM‑spec, sourced directly from Sinotruk’s approved suppliers. No aftermarket compromises.

Expert Support

Our engineers provide remote diagnostics for any WP12 Engine issue. 5‑minute response, 4‑hour solution commitment.

Fast Shipping

Global logistics network with 5000+ service stations ensures WP12 Engine parts reach you within days, not weeks.

Often from valve cover gasket or rear main seal. Replace with genuine WP12 Engine gasket sets and torque to spec. Check oil cooler housing for cracks.

Check coolant level, fan clutch, and water pump. Clean radiator fins. WP12 Engine thermostat should open at 82°C. Inspect viscous fan drive.

Clogged fuel filter, turbo boost leak, or injector fault. Perform diagnostics with WP12 Engine ECU scanner. Check charge air cooler for leaks.

“Our fleet of 20 trucks with Engine has clocked over 1 million km with only routine maintenance. The low‑end torque is incredible.”

— Sergei, fleet owner, Russia

“The Engine starts easily even at -30°C. Fuel consumption is 5% better than competitors. Highly satisfied with reliability.”

— Chen, logistics manager, China

“Rebuilt my WP12 Engine with genuine parts from this supplier. It runs like new and passed emissions with ease. Great customer support.”

— Miguel, mechanic, Peru

“The Engine in our Sinotruk dump truck handles 50 tons daily. No major issues after 3 years. The engine brake is a lifesaver.”

— Ali, site supervisor, UAE

“We operate 30 Howo tractors with WP12.42. Average fuel economy is 32L/100km, excellent for 40-ton loads. Highly recommended.”

— Juan, transport company, Spain

“The Engine is simple to work on. Parts are readily available and affordable. My mechanics prefer it over other brands.”

— Oleg, workshop owner, Kazakhstan

Common‑Rail Fuel System

The Engine utilizes a high‑pressure common‑rail system (up to 1800 bar) with multiple injections per cycle. ECU adapts injection timing based on load and altitude for optimal combustion, reducing fuel consumption by 5%.

Advanced Turbocharging

Wastegate or VGT turbochargers provide boost across the entire rpm range. Intercooler reduces intake temperature, improving combustion efficiency. Newer WP12H versions achieve 950 rpm max torque.

Oil & Filter Changes

Use genuine Engine oil filters and high‑quality diesel engine oil. Change every 30,000 km to prevent sludge buildup. Always prime the oil filter before installation to avoid dry starts.

Cooling System Care

Check coolant concentration and change every 2 years. Inspect hoses and clamps to avoid overheating and head gasket failure. Use only OAT coolant specified for the Engine to prevent cavitation.