SKF 18509 Engine Timing Cover Seal

SKF 18509 Engine Timing Cover Seal

SKF 18509 is an engine timing cover seal built for controlled sealing performance in demanding engine environments. It uses a Teflon sealing surface and precise dimensions to help maintain a tight seal where the timing cover meets the shaft area.

Compatible with select Chevrolet Colorado, GMC Canyon, Chevrolet Trailblazer, GMC Envoy, Saab 9-7x, Hummer H3, Isuzu Ascender, and Buick Rainier applications, this seal is designed for vehicles that need dependable oil control and contamination protection.

• Brand: SKF
• Part number: 18509
• Engine timing cover seal for sealing surface control
• Teflon sealing surface type
• Width: 0.413 in.
• Outside diameter: 2.331 in.
• Shaft diameter: 1.850 in.
• Cross-reference: 12574668

Sealing Performance Details

SKF has a long history in seal engineering, including early development of integrated shaft seals. The 18509 reflects that background with premium-material construction and application-specific sizing to help keep lubricants in and contaminants out. For Chevrolet Colorado and GMC Canyon timing cover service, as well as Chevrolet Trailblazer and GMC Envoy repairs, the seal dimensions and Teflon sealing surface support accurate fitment where the engine requires a stable sealing interface.

This part number 18509 is also listed for Saab 9-7x, Hummer H3, Isuzu Ascender, and Buick Rainier coverage across the model years shown below.

What This Seal Helps Address

• Oil seepage at the timing cover sealing area
• Contamination entering the engine through a worn seal interface
• Loss of sealing integrity from heat and age
• Leak-related maintenance on covered Chevrolet, GMC, Saab, Hummer, Isuzu, and Buick models

Installation Notes

Verify shaft diameter, outside diameter, and width before installation to confirm the seal matches the engine application. Inspect the sealing surface and surrounding components for wear, scoring, or contamination before fitting the new seal. Clean the mating surfaces thoroughly and follow the vehicle service procedure for timing cover service.

Quality Assurance

SKF manufactures seals to specific designs using premium materials and quality-controlled production methods. The brand’s seal engineering focus is centered on long service life and reliable sealing performance in automotive applications.

• Fits 2004-2012 Chevrolet Colorado, N/A
• Fits 2004-2012 GMC Canyon, N/A
• Fits 2004-2009 Chevrolet Trailblazer, N/A
• Fits 2004-2009 GMC Envoy, N/A
• Fits 2005-2009 Saab 9-7x, N/A
• Fits 2006-2008 Hummer H3, N/A
• Fits 2003-2008 Isuzu Ascender, N/A
• Fits 2004-2007 Buick Rainier, N/A