Timken 1172S Engine Crankshaft Seal - Front

Timken 1172S Engine Crankshaft Seal

The Timken 1172S engine crankshaft seal is built for front engine sealing applications where oil control and contaminant exclusion matter. It uses a precision sealing design with a reinforced outer case, ribbed rubber inner diameter, and vent holes to help maintain stable sealing performance.

Compatible with select Volvo and BMW front crankshaft seal applications, including Volvo S60, V60, XC60, XC70, C30, C70, S40, V50, V70, S80, XC90, V40, S70, 940, 240, 740, 760, 745, and 780, plus BMW 325iX front applications.

Key Features

• H-silicone construction for sealing durability
• Outside diameter: 1.866 in. / 47.40 mm
• Shaft diameter: 1.378 in. / 35.00 mm
• Housing bore: 1.850 in. / 47.00 mm
• Width: 0.276 in. / 7.00 mm
• CW helix direction
• Reinforced outer case helps resist installation damage
• Ribbed inner diameter supports sealing on minor spindle imperfections
• Internal contamination exclusion system helps block debris entry
• Vent holes promote lubricant flow around the seal lip to reduce heat build-up

Detailed Description

Timken 1172S is an engine crankshaft seal designed to retain lubricant at the front of the engine while helping keep dirt and debris out of the sealing area. The H-silicone sealing material, reinforced case, and ribbed inner diameter work together to support a stable fit on the shaft and housing. This seal cross-references National 1172 and BBB Industries 13939, 13945 for the same application.

For Volvo front crankshaft seal service, this part number is a direct match for a wide range of models, including 2001-2009 Volvo S60, 2015-2016 Volvo V60, 2015-2016 Volvo XC60, 2007-2013 Volvo C30, and 2003-2006 Volvo XC90. It also covers earlier Volvo applications such as 1990-1993 Volvo 240, 1985-1992 Volvo 740, and 1988-1991 BMW 325iX, front.

What It Helps Fix

• Front crankshaft oil leakage
• Grease seepage around the crankshaft seal area
• Contamination entering the seal lip area
• Heat-related seal wear from poor lubricant circulation
• Seal fit issues caused by minor shaft surface imperfections

Installation Notes and Tips

Confirm the shaft diameter, housing bore, width, and CW helix direction before installation. Inspect the crankshaft sealing surface for wear, scoring, or contamination, and clean the bore thoroughly so the seal seats evenly. Proper alignment during installation is important to avoid damaging the reinforced outer case and to maintain a uniform seal lip contact pattern.

Quality Assurance

Timken sealing components are engineered with precision sealing designs and contamination control features to support reliable lubricant retention in engine service. Verify fitment against the vehicle application and part dimensions before installation.