BBTV 4628 Engine Piston Ring

Engine Piston Ring Overview

This engine piston ring set, part number 4628, is built for a wide range of Ford, Lincoln, and Mercury applications with a 3.551-inch bore size. It uses grey iron top and second rings, a steel rail/stainless expander oil ring, and phosphate or chrome surface treatments for controlled wear characteristics.

Key Features

• Part number 4628 for direct catalog matching.
• Standard oversize configuration with a 90.19 mm bore specification.
• Grey iron top ring and second ring construction.
• Steel rail and stainless expander oil ring design.
• Phosphate-coated top and second rings with a chrome-treated oil ring surface.

Detailed Application Notes

Compatible with many Ford V8 engine applications across trucks, vans, SUVs, and performance models, this piston ring set is specified for engines using the listed bore and groove dimensions. Fitment includes Ford F-150, Ford Explorer, Lincoln Navigator, and Mercury Grand Marquis applications, along with other Ford, Lincoln, and Mercury models shown in the fitment data. Part number 4628 should be matched to the engine bore and ring groove dimensions before installation.

Common Repair Uses

• Restores cylinder sealing when compression has dropped.
• Addresses oil control issues caused by worn ring packs.
• Helps reduce blow-by from ring wear or loss of tension.
• Supports repair of oil consumption related to worn piston rings.
• Replaces rings during engine rebuilds or top-end service.

Installation Notes and Tips

Verify bore size, groove dimensions, and oversize status before assembly. Clean piston ring grooves thoroughly and confirm ring end gaps against the engine builder’s specifications. Because fitment spans multiple Ford, Lincoln, and Mercury platforms, confirm the engine code and application details for the exact vehicle before installation.