DJ Rock PR4186.30 Engine Piston Ring Set

Engine Piston Ring Set Overview

PR4186.30 is a premium engine piston ring set for Ford, Lincoln, and Mercury applications with a 110.7 bore diameter. It is built to restore cylinder sealing, control oil consumption, and support stable compression in a rebuild or overhaul.

Key Features

• Premium-grade piston ring set for internal engine service
• 110.7 bore diameter for the specified engine application
• Precision sealing helps maintain compression across cylinders
• Designed to regulate oil control and support heat transfer
• Manufactured from cast iron or steel alloy materials with advanced surface treatment in the product line

Detailed Application Information

PR4186.30 is an engine piston ring set used in compatible Ford, Lincoln, and Mercury engines listed in the fitment data, including applications such as the Ford F-250, Ford F-350, and Lincoln Continental. The ring set is intended for complete engine service where consistent sealing between the piston and cylinder wall is required. DNJ engine ring sets are engineered to meet or exceed OEM quality standards, and the product line uses durable ring materials and surface finishes to improve wear resistance and reduce friction under demanding operating conditions. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Low compression caused by worn piston rings
• Excessive oil consumption from ring wear or loss of seal
• Blow-by from poor cylinder sealing
• Reduced engine efficiency during rebuild service
• Uneven cylinder performance across the engine

Installation Notes and Tips

Confirm bore diameter and engine specifications before installation. This ring set is listed for complete engine service applications, so verify the exact engine build and production date against the fitment notes, especially where the listing specifies a cutoff date or oversize requirement. Proper cylinder inspection, ring gap measurement, and clean assembly practices are important for correct installation.

Quality Assurance

DNJ engine piston ring sets are manufactured to meet or exceed OEM quality standards. The PR4186.30 part number should be matched to the engine specification and fitment notes before assembly.