Timken 228480 Engine Crankshaft Seal - Rear

Timken Rear Crankshaft Seal 228480

Timken 228480 is a rear engine crankshaft seal built for dependable oil control in older GM and Isuzu applications. It uses a precision sealing design to keep lubricant in place while helping block dirt and debris from entering the engine.

Key Features

• H-silicone material for sealing performance in engine applications
• Reinforced outer case helps reduce installation damage and improve durability
• Ribbed rubber inner diameter helps seal minor spindle imperfections and promote positive seating
• Internal contamination exclusion system helps resist debris intrusion that can lead to leakage
• Vent holes allow lubricant flow around the seal lip to help reduce heat build-up
• Counter-clockwise helix type

Detailed Product Overview

This Timken crankshaft seal is engineered for the rear position and is sized with a 3.228-inch shaft diameter, 4.146-inch outside diameter, and 4.134-inch housing bore. The seal type 74 profile and H-silicone construction support consistent sealing at the crankshaft area, where oil control is critical. Timken 228480 is a direct-fit option for vehicles such as the Chevrolet S10, GMC S15, Isuzu Pickup, and Isuzu Trooper, along with other listed rear applications.

This part cross-references Monroe Shocks & Struts 32301 for the same application.

Vehicle Fitment

• Fits 1983-1987 Isuzu Impulse, rear
• Fits 1981-1987 Isuzu Pickup, rear
• Fits 1984-1987 Isuzu Trooper, rear
• Fits 1982-1985 Chevrolet S10, rear
• Fits 1982-1985 GMC S15, rear
• Fits 1981-1985 Isuzu I-Mark, rear
• Fits 1983-1984 Chevrolet S10 Blazer, rear
• Fits 1983-1984 GMC S15 Jimmy, rear
• Fits 1975-1982 Chevrolet LUV, rear

Common Problems This Seal Can Address

• Rear crankshaft oil leakage
• Grease or lubricant escape at the seal surface
• Contamination entering the crankshaft sealing area
• Leakage caused by minor shaft surface imperfections
• Heat-related seal wear in the rear engine area

Installation Notes

Confirm shaft diameter, housing bore, and seal orientation before installation. The counter-clockwise helix must match the engine application, and the sealing lip should be seated evenly to avoid distortion. Clean the mating surfaces thoroughly and inspect the crankshaft sealing surface for wear or scoring before installing Timken 228480.

Quality Assurance

Timken oil and grease seals are built with precision sealing geometry, reinforced construction, and contamination control features to support reliable engine sealing performance.