Mitsubishi 4D34 4D32 Diesel Engine Piston Ring Set OEM ME997318 ME018274 RS4655

Rebuild or overhaul your excavator, truck, or industrial equipment with this high-quality piston ring set for Mitsubishi 4D34 and 4D32 diesel engines. Piston rings are critical components that seal the combustion chamber, control oil consumption, and transfer heat from the piston to the cylinder wall. Manufactured to meet or exceed original OEM specifications, this piston ring set ensures proper compression, reduced blow-by, and long-term durability in demanding applications.

• Critical Component for Engine Performance
  Piston rings serve four essential functions: sealing the combustion chamber to maximize compression, regulating oil consumption by controlling lubricant flow, transferring heat from the piston to the cylinder wall for proper cooling, and supporting the piston within the cylinder to prevent knocking. High-quality rings are essential for maintaining engine power and efficiency in heavy-duty excavator and truck applications.
• Precision-Engineered for Mitsubishi 4D34/4D32 Engines
  Specifically designed for the 104mm bore of the Mitsubishi 4D34 and 4D32 engine platforms. This ring set matches factory specifications for ring width, gap, and tension. Proper fit ensures optimal sealing across all operating conditions encountered in demanding industrial environments.
• Three-Ring Design with Specific Profiles
  Each piston requires three rings: two compression rings designed to withstand highest combustion pressures and one oil control ring that regulates oil film thickness on the cylinder wall. The dual compression rings provide excellent sealing capabilities, preventing gas leakage and ensuring consistent engine performance.
• Advanced Oil Control Technology
  The oil control ring efficiently regulates lubricant distribution along the cylinder walls, preventing excess oil from entering the combustion chamber. This design minimizes carbon buildup, reduces emissions, and prevents blue smoke.
• High-Grade Material Construction
  Manufactured from high-quality materials with wear-resistant coatings. Advanced surface treatment options include chrome-plating, nitriding, and moly-inlaid technologies to ensure long service life under extreme operating conditions.
• Heat Transfer Optimization
  Piston rings transfer heat from the piston crown to the cylinder wall, preventing heat buildup that could damage the engine. Proper heat transfer maintains optimal operating temperatures and extends engine life.
• Rigorous Quality Testing
  Manufactured to ISO 9001 and TS16949 standards with precision tolerance, ensuring consistent quality across all units. Every ring set meets dimensional specifications for gap, width, and tension.
• OEM-Equivalent Performance
  Manufactured to meet or exceed original Mitsubishi specifications, ensuring perfect compatibility with 4D34/4D32 engine components including pistons, cylinder bores, and ring grooves. Available with OEM numbers ME997318, ME018274, and RS4655 for guaranteed fit and function.

• 100% Inspected - Every ring set undergoes dimensional inspection for proper gap, width, and tension before shipment.
• OEM Standard - Manufactured to meet or exceed original Mitsubishi specifications in ISO-certified facilities.
• Warranty - 6-month warranty against manufacturing defects.
• Global Shipping - Fast DHL, FedEx, UPS shipping available from multiple warehouses.
• Expert Support - Need help identifying the correct piston ring set for your engine? Send us your engine serial number or old part number.

Piston rings are precision components that require careful installation. When installing new piston rings on a Mitsubishi 4D34 or 4D32 engine, follow these critical guidelines:

• Always verify correct ring set based on engine serial number and cylinder bore size.
• Read manufacturer's instructions and technical guidelines to understand piston ring types and specifications applicable to your specific engine.
• Thoroughly clean ring grooves of piston before installation.
• Ensure rings are installed correctly in the appropriate position. Check that rings are not twisted, deformed, or stuck.
• Verify the gap between piston ring and piston groove to avoid excessive or small fit gaps.
• Ensure rings are fitted with marked faces upward according to manufacturer specifications.
• After installation, make sure rings can be moved freely without jamming in the piston grooves.
• Always use a proper ring expander tool when installing rings.
• Use an installation tool when inserting piston into cylinder.
• Professional installation is recommended due to the precision required for proper ring seating and engine break-in.