BBTV 2C4640 Engine Piston Ring

Engine Piston Ring for Small-Displacement Engines

This engine piston ring set is built for 75.00 mm bores and standard oversize applications. It is listed for a wide range of compact engines, including Honda Civic, Honda CRX, and Geo Tracker fitments, with part number 2C4640 used throughout the catalog.

Key Features

• Standard oversize configuration for 75.00 mm engine bores.
• Chrome top ring surface for wear resistance.
• Steel top ring construction for stable sealing performance.
• Grey iron second ring with phosphate surface treatment.
• Steel rail and stainless expander oil ring design for oil control.
• Fits 1988-1996 Honda Civic, N/A; 1988-1991 Honda CRX, N/A; and 1989-1996 Geo Tracker, N/A.

Detailed Description

Part number 2C4640 is an engine piston ring set for 4-cylinder applications with a 75.00 mm bore and standard sizing. The ring package uses a chrome-treated top ring, a phosphate-treated second ring, and a steel rail/stainless expander oil ring arrangement to support cylinder sealing and oil management. This configuration is relevant for compact engines found in Honda Civic, Honda CRX, and Geo Tracker applications, where consistent ring sealing and oil control are critical to compression retention and combustion efficiency.

The ring materials and surface treatments are selected to match the demands of everyday street engines. The chrome top ring and steel construction provide a durable sealing surface, while the grey iron second ring and oil ring assembly help manage blow-by and oil film control. Part number 2C4640 also cross-references Airtex Fuel Pumps 41592 and 41618 for the same application.

What It Is Used For

• Restoring compression loss caused by worn piston rings.
• Reducing oil consumption from ring wear or poor oil control.
• Addressing blow-by from weakened cylinder sealing.
• Replacing rings during an engine rebuild or overhaul.
• Correcting smoke, fouling, or low compression related to ring wear.

Installation Notes and Tips

Verify bore size, ring groove dimensions, and engine application before installation. Clean piston ring grooves thoroughly and inspect cylinder walls for taper, scoring, or out-of-round conditions. Proper ring end gap measurement and cylinder preparation are essential for correct sealing. Confirm the engine uses the listed 75.00 mm bore and standard oversize specification before assembly.

Quality Assurance

Part number 2C4640 is cataloged with defined material and surface-treatment specifications for consistent rebuild selection. Review the fitment list carefully to confirm the exact Honda Civic, Honda CRX, or Geo Tracker application before ordering.