The part is a comprehensive assembly kit designed to rebuild or replace the entire valve actuation system of the Sitrak C7H engine. This complete set includes every component from the cylinder head cover to the valve springs, rocker arms, and pistons, ensuring reliable engine performance and longevity.
This high-quality Valve Train kit features the Cylinder Head Cover Assembly, Cylinder Head Assembly, Cylinder Head Gasket, EVB Pressure Plate Assembly, Rocker Arm Mechanism, Cylinder Head Bolts, Valve Bridge, Valve Keepers, Valve Spring Retainers, Valve Springs, Intake Valve Stem Seals, Shims, Intake Valves, EVB Valve Bridge Assembly, Valve Stem Seals, Exhaust Valves, Piston Ring Sets, Pistons, Piston Pin Retaining Rings, Piston Pins, Connecting Rod Assemblies, Connecting Rod Bearings, Expansion Plugs, Composite Sealing Washers, Screw Plugs, and Assembly Lubricant. Every component of this Valve Train is manufactured to OEM specifications for a perfect fit and reliable operation under extreme conditions.
The part is engineered to deliver precise valve timing and efficient combustion, maximizing engine power and fuel economy. The EVB (Exhaust Valve Brake) components provide additional engine braking capability, while the high-strength materials ensure durability in heavy-duty applications.
For complete technical specifications and ordering details, please refer to the official Sinotruk Catalog, which provides comprehensive information on all available variants and compatible truck models for The part.
Whether you are performing a major engine overhaul or repairing a specific valve train issue, this Valve Train kit delivers factory-quality components and a straightforward installation. This Valve Train is the definitive choice for operators who demand reliability, performance, and long engine life.
This assembly seals the top of the cylinder head and houses the rocker arms. In The part, it features an integrated oil separator and a filler neck with a pressure relief valve, ensuring proper crankcase ventilation.
This is the main cylinder head casting, made of HT300 gray iron. In The part, it includes precision-machined valve guides and seats, and features a cylinder-to-cylinder relief design that improves cooling and reduces thermal stress.
This multi-layer steel gasket provides a leak-free seal between the cylinder head and the engine block. In The part, it includes a silicone bead for improved sealing and is designed to withstand high cylinder pressures.
This assembly is part of the Exhaust Valve Brake system. In The part, it is actuated by engine oil pressure and provides additional braking force when the exhaust valves are partially opened during the compression stroke.
This mechanism transfers motion from the camshaft to the valves. In The part, it features roller followers for reduced friction and a hydraulic lash adjuster for automatic clearance compensation.
These high-strength bolts secure the cylinder head to the block. In the Valve Train, they are grade 12.9 with a fine-pitch thread, and are pre-coated with thread locker for consistent torque retention.
This bridge connects the valve stem to the rocker arm. In the Valve Train, it is made of hardened steel and includes a spherical seat for self-alignment, ensuring even load distribution across the valve stem.
These split-cone locks secure the valve spring retainer to the valve stem. In the Valve Train, they are made of hardened tool steel and feature a precise taper that ensures positive locking under valve spring pressure.
These retainers hold the valve spring in place and transmit spring force to the valve keepers. In the Valve Train, they are made of chromoly steel with a wear-resistant coating, providing long-term durability.
These springs close the valves after cam actuation. In the Valve Train, they are made of high-carbon steel with a shot-peened finish and feature a progressive rate design to control valve train dynamics at high RPM.
These seals prevent oil from entering the combustion chamber through the intake valve guides. In the Valve Train, they are made of FKM rubber with a spring-loaded lip for positive sealing at all temperatures.
These shims are used to adjust valve lash. In the Valve Train, they are available in various thicknesses and are made of hardened steel with a precision-ground surface for accurate clearance setting.
These valves control the flow of air into the cylinders. In the Valve Train, they are made of heat-resistant steel with a hardened tip and a 45-degree seat angle, designed for high-temperature durability.
This is the bridge specifically for the exhaust valve brake system. In the Valve Train, it includes a hydraulic piston that pushes the exhaust valve slightly open during braking, increasing engine braking power.
These seals prevent oil leakage on the exhaust valve guides. In the Valve Train, they are made of high-temperature FKM with a metal insert for durability and are designed to withstand exhaust heat.
These valves exhaust combustion gases. In the Valve Train, they are made of austenitic steel with a sodium-filled stem for heat dissipation, ensuring reliable operation under high exhaust temperatures.
This set includes compression rings and an oil control ring. In the Valve Train, the top ring is a barrel-faced steel ring with a ceramic coating, the second ring is a tapered steel ring, and the oil ring is a three-piece design for excellent oil control.
This is the main piston body, made of cast aluminum alloy with a graphite-coated skirt for reduced friction. In the Valve Train, it includes a steel insert for the top ring groove and a cooling gallery for heat dissipation.
These rings secure the piston pin in the piston. In the Valve Train, they are made of spring steel with a circular cross-section and are designed for easy installation with standard pliers.
This hardened steel pin connects the piston to the connecting rod. In the Valve Train, it features a semi-floating design with an interference fit in the piston and a free fit in the connecting rod for proper articulation.
This forged steel connecting rod transfers force from the piston to the crankshaft. In the Valve Train, it includes a precision-bored big end with replaceable bearing shells and a small end bushing.
This bearing shell provides the bearing surface for the connecting rod journal. In the Valve Train, it is made of a steel-backed aluminum-tin alloy with a micro-embedded lubrication layer for reduced wear.
This cup-type expansion plug seals the casting holes in the cylinder head or block. In the Valve Train, it is made of steel with a corrosion-resistant coating and is installed with a slight press fit.
This sealing washer is used for plug connections. In the Valve Train, it is made of FPM rubber bonded to a steel ring, providing a reliable seal against oil and coolant at pressures up to 6 bar.
This plug seals oil passages or drain holes. In the Valve Train, it features a hexagonal socket drive and is made of zinc-plated steel with a pre-applied thread sealant for leak-free operation.
This high-performance assembly lubricant is used during installation of the Valve Train. It contains extreme pressure additives and anti-wear agents, ensuring proper lubrication during initial engine start-up and preventing dry start damage.
The Valve Train components are manufactured to the highest tolerances, ensuring precise valve timing and efficient combustion. This results in improved engine power, reduced fuel consumption, and lower emissions, making it an ideal choice for demanding fleet operators.
This Valve Train kit provides every component necessary for a full cylinder head and valve train rebuild. From the cylinder head cover to the connecting rod bearings, the all-in-one solution eliminates the need to source parts from multiple suppliers, saving time and ensuring compatibility.
All Valve Train components are manufactured from premium materials such as heat-treated alloy steel, high-temperature rubber, and advanced composites. This ensures exceptional wear resistance and the ability to withstand the high temperatures and pressures of modern diesel engines.
The part is manufactured to the exact OEM specifications, guaranteeing a perfect fit and seamless integration with the Sitrak C7H engine. The inclusion of assembly lubricant ensures a proper break-in period, reducing the risk of premature wear and extending engine life.
Our online catalog provides comprehensive access to genuine SINOTRUK parts for all major vehicle lines — including HOWO, Sitrak, Steyr, and Yellow River series trucks. You can browse detailed specifications, original part numbers, and exploded-view diagrams for every assembly. Whether you are performing routine maintenance or planning a major overhaul, the catalog helps you quickly identify the correct components for your vehicle. When you become a SINOTRUK customer, we offer complimentary full‑access catalog services, ensuring you always have the latest product data and interchangeability information at your fingertips to support efficient fleet management and accurate parts ordering.
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