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Anti-Polishing Ring Cummins 3689871
Prevents carbon buildup on the piston crown and protects cylinder liners from bore polishing to extend engine life and maintain compression.
Description
Cummins 3689871 Anti-Polishing Ring (APR)
The Cummins 3689871 Anti-Polishing Ring, also frequently referred to as a carbon scraper ring or piston cleaning ring, is a critical component designed for high-performance heavy-duty diesel engines. Its primary role is to remove hard carbon deposits from the piston crown before they can cause “bore polishing”—a condition where the cylinder liner walls become too smooth, leading to increased oil consumption and loss of compression.
Key Features and Benefits
- Carbon Removal: Effectively rids the piston crown of combustion residue to prevent mechanical interference.
- Liner Protection: Maintains the necessary surface roughness of the cylinder bore, ensuring optimal oil film retention and piston ring sealing.
- Enhanced Durability: Engineered with superior materials to provide the radial strength and rigidity required for harsh combustion environments.
- Improved Efficiency: By maintaining proper cylinder conditions, this ring contributes to better fuel efficiency and reduced engine blow-by.
Engine Compatibility
This anti-polishing ring is engineered for use in a wide range of Cummins heavy-duty engine series, including:
- ISX Series: ISX CM570, ISX CM871, ISX15 CM2250, ISX15 CM2350 X101
- QSX Series: QSX15 CM2250, QSX15 CM2350 X105
- X15 Series: X15 CM2350 X116B, X15 CM2350 X123B, X15 CM2450 X134B
Technical Specifications
- Weight: 0.16 lbs
- Dimensions: 6.6 x 6.6 x 0.85 inches
- Function: Bore polishing prevention and carbon scraping
