Diesel Engine Parts, Products

Parameters

• Part Number: 4089644-ISLE
• Type: Compression ring (top ring) for ISLE series diesel engines
• Material: High-grade ductile iron with chrome-plated running surface
• Dimensions: Matches ISLE engine piston bore (standard size, no oversize)
• Ring Gap: 0.35–0.45 mm (installed)
• Surface Treatment: Anti-wear, anti-corrosion coating
• Compatibility: Cummins ISLE 8.9L diesel engine

Installation Position

• Installed in the top groove of the piston ring lands.
• Fitted between the piston and cylinder liner, seated firmly in the piston’s top ring groove.
• Installed with a ring compressor; ring gap offset from piston pin axis to avoid pressure leakage.

Function

1. Sealing: Seals combustion chamber to prevent gas leakage, maintaining compression pressure.
2. Heat Transfer: Transfers piston heat to cylinder liner for cooling.
3. Oil Control: Scrapes excess oil from cylinder wall, preventing oil entering combustion chamber.
4. Wear Resistance: Withstands high temperature, pressure and friction in combustion chamber.