Product Features

• Structure: Inline 6-cylinder, 4-valve per cylinder design, with a turbocharged and intercooled air intake system for high efficiency.

• Performance: Delivers high torque at low RPM, ensuring strong pulling power for heavy loads. It features a high-pressure common-rail fuel injection system for precise fuel delivery and optimized combustion.

• Reliability: Built with a cast iron cylinder block and head, and a forged steel crankshaft, ensuring durability in harsh operating conditions.

Core Function

• Serves as the primary power source for heavy-duty vehicles and machinery, converting fuel energy into rotational power to drive the transmission and wheels.

• Provides consistent power and torque across a wide RPM range, supporting efficient operation in both on-road and off-road applications.

• Meets strict emission requirements while maintaining fuel efficiency, reducing operating costs for fleet operators.

Engine Assy D12.42-30 SINOTRUK HOWO – Factory Direct Supply with Competitive Pricing

When your fleet demands uncompromising power and reliability, the Engine Assy D12.42-30 delivers exactly what SINOTRUK HOWO heavy-duty trucks were engineered to run on. Sourced directly from our factory supply chain in China, this complete engine assembly brings 420 horsepower of proven performance to your workshop or assembly line — at a price point that protects your bottom line. JINAN METTLEAD AUTO SALES CO.LTD. has supplied thousands of these units to procurement teams across Africa, Southeast Asia, the Middle East, and South America who refuse to compromise on quality or overpay for OEM-grade components.

Key Features and Benefits of the Engine Assy D12.42-30

Engineered for Heavy-Duty Performance

The D12.42-30 is a 12-liter, inline 6-cylinder diesel engine assembly that produces 420 HP at rated speed. It meets China III (Euro III equivalent) emission standards while delivering the torque curve that long-haul and heavy-load applications demand. Every unit undergoes strict quality control testing before shipment to ensure it arrives ready for installation.

Core Advantages for Procurement Managers

• Factory-Direct Pricing: We eliminate middlemen, passing cost savings directly to your purchase order.
• Complete Assembly: Ships as a fully assembled engine unit — reducing your workshop downtime and labor costs.
• Proven Durability: The D12 platform has accumulated millions of kilometers of service life in demanding operating environments worldwide.
• Fast Lead Time: Stock availability and streamlined logistics mean your trucks get back on the road sooner.
• Broad Compatibility: Designed as a direct replacement for SINOTRUK HOWO A7, HOWO T7H, and related heavy-duty tractor and dump truck platforms.

Application Scenarios

The Engine Assy D12.42-30 is purpose-built for the following vehicle platforms and use cases:

1. Compatible Vehicle Models: SINOTRUK HOWO A7 6×4 Tractor Truck, HOWO T7H 6×4 Dump Truck, HOWO 8×4 Cargo Truck, and SITRAK C7H series trucks equipped with the D12 engine platform.
2. Primary Use Cases: Complete engine replacement for overhaul programs, fleet refurbishment projects, CKD/SKD assembly operations, and aftermarket rebuilds where a brand-new power unit is more cost-effective than a full engine rebuild.

Technical Specifications – Engine Assy D12.42-30

OEM/ODM Capability and Custom Packaging

JINAN METTLEAD AUTO SALES CO.LTD. understands that different markets have different requirements. That is why we offer flexible solutions tailored to your business:

• White-Label Packaging: We supply Engine Assy D12.42-30 units with neutral or custom-branded packaging to support your own brand identity in local markets.
• Custom Packaging & Crating: Heavy engine assemblies require secure transit protection. We provide reinforced wooden crate packaging with anti-corrosion treatment, customized to your shipping method (sea freight, rail, or land transport).
• Strict Quality Control: Each engine assembly passes a multi-point inspection protocol — including compression testing, leak detection, and visual inspection — before it leaves our facility.
• Flexible Order Quantities: Whether you need a single replacement unit or a bulk order for a fleet overhaul program, we accommodate your volume requirements with consistent pricing.

We also supply the full range of SINOTRUK HOWO Engine Parts — from cylinder heads and turbochargers to fuel injection pumps and gasket kits — so you can source everything from one reliable partner.

Frequently Asked Questions – Engine Assy D12.42-30

What is the difference between Engine Assy D12.42-30 and D12.42-20?

The “-30” designation indicates this engine assembly meets China III (Euro III) emission standards, while the “-20” variant meets China II (Euro II). The D12.42-30 features an upgraded electronic unit pump fuel injection system and optimized combustion calibration for lower particulate and NOx emissions, while maintaining the same 420 HP power output.

Is this Engine Assy D12.42-30 a genuine SINOTRUK/CNHTC product?

Yes. We supply original-quality engine assemblies sourced through authorized SINOTRUK supply channels. Each unit carries proper identification markings and serial numbers traceable to the CNHTC manufacturing system.

What is included in the complete Engine Assy D12.42-30?

The complete engine assembly includes the long block (cylinder block, crankshaft, pistons, cylinder head), turbocharger, intercooler piping, fuel injection system (electronic unit pumps), starter motor, alternator, flywheel housing, oil cooler, water pump, and all standard engine-mounted accessories. It ships ready for installation into the vehicle chassis.

How should I store the Engine Assy D12.42-30 before installation?

Store the engine assembly in a dry, covered environment away from direct moisture and extreme temperature fluctuations. Keep all port covers and protective caps in place until installation. For storage periods exceeding 6 months, apply anti-rust oil to exposed machined surfaces and rotate the crankshaft periodically to prevent bearing flat-spotting.

What is the typical lead time for Engine Assy D12.42-30 orders?

For standard orders, we typically ship within 7–15 business days depending on current stock levels and your destination. Bulk orders or custom-packaged shipments may require 15–25 business days. We provide real-time order tracking once your shipment departs our warehouse.

Can this engine be used in non-SINOTRUK vehicles?

The D12.42-30 is engineered specifically for SINOTRUK HOWO and SITRAK platforms. While the physical dimensions may fit certain custom applications, the ECU calibration, wiring harness connectors, and mounting points are optimized for SINOTRUK chassis. We recommend consulting with your engineering team before attempting cross-platform installation.

Ready to Secure Your Engine Assy D12.42-30 at Factory-Direct Pricing?

Your fleet cannot afford downtime, and your budget cannot afford inflated prices. JINAN METTLEAD AUTO SALES CO.LTD. delivers the Engine Assy D12.42-30 with the quality assurance, competitive pricing, and responsive service that professional procurement teams expect.

Send us your inquiry today with your required quantity, destination port, and preferred shipping method. Our team responds within 24 hours with a detailed quotation including FOB/CIF pricing, lead time confirmation, and packaging specifications.

Contact Us Now to Request Your Quotation →