Products Description
This batch of Weichai WP12 (P12) diesel engines are all genuine heavy-duty vehicle & construction equipment take-outs, directly harvested from active, well-maintained trucks and machinery. No crash damage, no water submersion, no years of overloaded abusive use. Most original rigs were used for long-haul highway runs or standard construction jobs, with full service records and known working history.
This 11.596L Weichai WP12 is the classic Lanqing series workhorse, with a proven B10 lifespan of over 1.8 million kilometers. It’s built with a reinforced frame block and dry cylinder liners — famous in the trucking world for being tough as nails, putting down consistent power, and delivering steady fuel mileage. All units are all original, untouched from the factory, never been torn down for an overhaul. Core parts — block, crank, rods, head — are all factory original. No boring, no sleeving, no piecing together with aftermarket parts, no reconditioning, no cosmetic touch-ups.
Aftermarket parts are everywhere for these engines, super cheap to fix. Truck drivers all over China swear by them: “they run forever, aren’t fussy about fuel, and climb hills like a beast”. Before we ship, every single engine gets a full workup: cold start test, hot load run, cylinder pressure check, oil pressure test, exhaust smoke inspection. We weed out any unit with oil burn, odd noises, leaks, or weak power.
Fits China III/IV/V/VI emission spec heavy trucks, dump trucks, mixers, and buses. We support single unit swaps, shop bulk stocking, and full container export orders. Drop it in, fire it up, and it’ll put down power right away, with normal fuel use, and keep running strong for years.
2. Technical Parameters & Fitment
| Parameter | Specs |
|---|---|
| Engine Model | Weichai WP12 (P12) |
| Displacement | 11.596L Inline 6-Cylinder 4-Stroke Diesel |
| Power | 400–460 HP (294–338kW) |
| Torque | 1780–2200N·m (1000–1400rpm) |
| Air Intake | Turbocharged & Intercooled |
| Fuel System | Electronically Controlled High Pressure Common Rail |
| Emission Standard | China III / China IV / China V / China VI |
| Bore × Stroke | 123mm×162mm |
| Inspection Pass Criteria | Even cylinder pressure, no odd cold start noises, normal oil pressure, no oil burn, zero leaks |
| Stock Status | Original take-outs in stock, single unit & full container shipping available |
Fitment
Heavy-Duty Trucks: Shacman Delong, Sinotruk Howo, Foton Auman, FAW Jiefang J6P/J7, Dongfeng Kinland
Construction Equipment: 8×4 Heavy-Duty Dump Trucks, 6×4 Tractor Trucks, Concrete Mixers, Truck Cranes
Buses: 12m+ Passenger / Tour Coaches
Other Uses: Generator Sets, Marine Auxiliary Engines, Construction Machinery Conversions
3. FAQ
Q: Have these P12 engines been overhauled?
A: All units are completely original, never been opened up, never had a full overhaul, no core parts replaced. No signs of bolts being taken apart, all accessories are complete.
Q: What tests do you run before shipping?
A: Full inspection: cold start, idle, hot load run, cylinder pressure, oil pressure, exhaust smoke, leak check. We won’t ship any unit with hidden issues.
Q: Do I need to modify the motor mounts or wiring harness?
A: All mounts, wiring harness, and connectors are factory original spec. Direct bolt-in fit for same-model vehicles, no modifications needed.
Q: Can I see a video of the engine running before I order?
A: We can send you real photos of the whole engine, cold start videos, and cylinder pressure/oil pressure test numbers anytime. We only ship after you confirm the engine is in good shape.
