National 99179 Engine Crankshaft Repair Sleeve - Front

Engine Crankshaft Repair Sleeve for Front Applications

National 99179 is a stainless steel engine crankshaft repair sleeve for front seal repair applications. It is sized for a shaft diameter of 1.781 inches, with a minimum of 1.778 inches and a maximum of 1.784 inches, helping restore a proper sealing surface where wear has affected crankshaft performance.

Compatible With Volvo and Jeep front applications, this repair sleeve supports a precise fit on the crankshaft sealing area. The National 99179 is also cross-referenced to Timken KWK99179 for the same application.

Key Features

• Part number: 99179
• Engine crankshaft repair sleeve for front seal repair
• Stainless steel construction for durability
• Shaft size: 1.781 in. with 1.778-1.784 in. range
• Flanged outside diameter: 2.125 in.
• Installation depth: 1.062 in.
• Overall width: 0.800 in.; width on shaft: 0.675 in.
• National sealing solution backed by more than 75 years of industry experience

Detailed Description

National 99179 is an engine crankshaft repair sleeve used to renew a worn crankshaft sealing surface so the front seal can seat correctly. The stainless steel sleeve measures 1.781 inches on the shaft, with a narrow tolerance range for accurate installation, and its flanged design helps position the sleeve during service. This part is a practical choice for front crankshaft repair on vehicles such as Volvo S60, Volvo XC70, Jeep Wrangler, and Jeep Cherokee applications listed in the fitment data.

Use National 99179 when servicing front crankshaft seal wear on compatible Volvo and Jeep engines. The part number 99179 is also a useful reference when searching for a direct replacement or comparing interchange listings.

Common Problems This Part Can Address

• Front crankshaft seal leakage caused by a worn sealing surface
• Grooving or scoring on the crankshaft where the seal rides
• Repeated seal failure after prior repairs
• Oil seepage from the front of the engine
• Loss of sealing integrity at the crankshaft nose

Installation Notes and Tips

• Measure the shaft before installation to confirm it falls within the 1.778-1.784 inch range.
• Clean the crankshaft sealing surface thoroughly before pressing the sleeve into place.
• Install to the specified depth of 1.062 inches for proper alignment.
• Verify the sleeve sits evenly on the shaft width of 0.675 inches.
• Confirm vehicle-specific front application details before service on Volvo S60, Jeep Wrangler, or Jeep Cherokee models.

Quality Assurance

National has supplied sealing solutions for more than 75 years and continues to develop service parts for modern vehicle repair needs. Part 99179 is built as a stainless steel repair sleeve for consistent fit and sealing support in front crankshaft applications.