BBTV 133 Engine Piston Ring

Engine Piston Ring for Chevrolet Applications

This engine piston ring is built for Chevrolet engines with a 3.5-inch bore and standard oversize specification. It is a fitment-based replacement for classic Chevrolet truck and passenger car applications, including Chevrolet Truck, Bel Air, Fleetline, and other listed models.

Key Features

• Standard oversize piston ring for 3.5-inch bore applications
• Grey iron top ring and second ring construction
• Phosphate surface treatment on the top and second rings
• Steel rail and stainless expander oil ring design with chrome treatment
• Configured for six-cylinder engine applications

Detailed Description

Part number 133 is an engine piston ring set specification for Chevrolet engines that require a standard-size bore ring package. The ring design combines grey iron compression rings with a steel rail and stainless expander oil control ring, while the phosphate and chrome surface treatments support ring seating and wear resistance during operation. This part number 133 is listed across a wide range of Chevrolet passenger and light truck applications from the late 1930s through the early 1950s, including Chevrolet Truck, Bel Air, Fleetline, Fleetmaster, and Stylemaster Series models. If you are sourcing a piston ring for a classic Chevrolet engine rebuild, part number 133 matches the bore and ring groove dimensions shown in the product data.

What It Is Used For

• Restoring cylinder compression in worn engine assemblies
• Controlling oil consumption from worn ring packs
• Replacing damaged or worn piston rings during overhaul
• Supporting proper sealing in classic Chevrolet six-cylinder engines

Installation Notes and Tips

Verify bore size, groove dimensions, and engine configuration before installation. Confirm that the 3.5-inch bore, 1/8-inch top groove, 1/8-inch second groove, and 3/16-inch oil groove match the engine being rebuilt. Use standard ring installation and break-in procedures for best results, and inspect cylinder walls for wear or taper before assembly. Fitment includes Chevrolet Truck, Bel Air, Fleetline, Sedan Delivery, Styleline Deluxe, Styleline Special, Fleetmaster, Stylemaster Series, Special Deluxe, KP, Master 85, JA Master Deluxe, and Master applications as listed.

Quality Assurance

This part cross-references Monroe Shocks & Struts (e.g., 50P, 90P) for the same application. The listed interchange references help confirm application matching for rebuild and service work.