Ductile Iron Oil Piston Ring Sets Chrome Plated For Isuzu 4JG2 Diesel Engine

This piston ring set (8-97080-215-0) is engineered for the Isuzu 4JG2 / 4JG2T 4-cylinder diesel engine. It is a popular replacement kit for the overhaul of Isuzu light trucks, off-road vehicles, and mini excavators. The set reproduces OEM specifications for side clearance, back clearance, and end gap, matching STD pistons and 95.4 mm cylinder liners perfectly.

As the core sealing component, piston rings deliver gas sealing, oil scraping, and heat transfer — governing cylinder pressure, fuel consumption, and exhaust smoke. Optimized in base material, surface hardening, gap grinding, tension control, and sorting inspection, this ring set suits heavy-duty cycles with frequent load changes and temperature fluctuation during mountain transport and construction work.

• High-Toughness Ductile Iron — Excellent Thermal Fatigue Resistance & Anti-Crack Performance

  High-grade ductile iron is used for superior thermal fatigue resistance over ordinary grey cast iron. It resists cracking and chipping under knocking and thermal shock. It works reliably for trucks climbing hills and construction machines with frequent start-stop and variable load, preventing catastrophic cylinder scuffing caused by broken rings.

• Dense Chrome-Plated Compression Rings for Extended Service Life

  The working face of the compression rings is coated with dense hard chrome, delivering high surface hardness and low friction. The slow wear rate under high temperature and carbon deposit keeps a stable end gap and slows cylinder pressure loss, preventing weak power, unstable idle, and hard cold starting after long running hours.

• Expander Oil Ring with Uniform Tension for Consistent Oil Control

  A built-in expander spring distributes even pressure on the cylinder wall. It scrapes excess lubricant to stop oil blow-by and blue smoke while maintaining the essential oil film to avoid dry scuffing. It solves the common oil burning and abnormal smoke issue after 4JG2 engine overhaul.

• Individually Ground End Gap for Easy and Safe Assembly

  Every ring is precision ground separately to meet OEM gap requirements. It avoids gas leakage from an oversize gap or ring seizure due to insufficient clearance after thermal expansion. It gives better assembly tolerance for technicians and improves the first-time repair success rate.

• Pre-Matched Set & Batch Inspection for Stable Quality

  All rings are sorted and matched as one complete kit to prevent part mixing. Hardness, end gap, and spring tension are sampled per batch. Products with bad coating or abnormal tension are rejected. The low return rate makes it suitable for bulk export stock and repair shop inventory.

Ready stock is available as a single ring set, or as full overhaul kits with piston, pin, circlips, and liner for regular 4JG2 engine maintenance.