Diesel 4HK-TC Engine STD Piston Rings Replacement Heat Resistance 8-97228-303-0

Product Specification

Product: High Wear & Heat Resistant Standard Precision Piston 8-97228-303-0

Replacement Piston for 4HK-TC Diesel Engine

This piston 8-97228-303-0 is engineered exclusively for the 4HK-TC diesel engine and serves as a core replacement part for engine overhaul. Manufactured to OEM assembly tolerances, it is widely used for power system repair on construction machinery and heavy-duty trucks. As a critical load-bearing component inside the combustion chamber, the piston withstands explosive pressure, extreme temperatures and reciprocating friction. Optimizations are made across five key dimensions: raw material, internal structure, machining, surface coating and quality inspection to deliver consistent long-term reliability.

Specifications

表格

Key Features

1. High-Silicon Aluminum Alloy, Heat Resistant & Anti-Deformation We adopt refined eutectic high-silicon aluminum alloy, which features a lower thermal expansion coefficient than ordinary aluminum alloys. Under continuous heavy loads and instantaneous high temperatures inside the cylinder, the piston effectively resists oval distortion and cylinder scuffing. Suitable for construction sites and long-haul heavy transport, it prevents clearance failure caused by thermal expansion.
2. Built-In Cooling Gallery for Balanced Heat Dissipation An annular oil gallery is cast inside the piston. Circulating engine oil continuously draws heat away from the piston crown and ring grooves. This avoids carbon buildup and ring sticking in the top ring grooves, extends the service life of the piston and piston rings, and reduces blow-by and oil consumption.
3. Full CNC Precision Machining with Tight Tolerance Control The pin bore, ring grooves, outer diameter and combustion chamber are all CNC-machined. Ring groove flatness and pin bore concentricity comply with OEM specifications. After installation, piston rings form a tight seal. Stable in-cylinder pressure maintains engine power for smooth startup and steady idle after overhaul.
4. Outer Dry Graphite Anti-Friction Coating to Reduce Run-In Wear The piston skirt is coated with a special dry graphite lubricating layer. During cold starts and the initial break-in period before full oil lubrication is established, the graphite film prevents dry friction and cylinder liner scoring. It lowers the risk of break-in failures and provides greater assembly tolerance for mechanics.
5. Batch Penetrant Testing for Traceable Quality All raw castings go through penetrant inspection to detect hidden sand holes, air voids and casting cracks. Defective blanks are rejected before precision machining. Every finished piston receives individual dimensional inspection. Its low return rate makes it ideal for bulk export stock and repair workshop inventory.

We supply pistons individually, as well as complete piston kits including wrist pin, circlips and piston rings. Stock available for routine overhaul of 4HK-TC engines.