Dorman 42353 Engine Oil Filler Cap O-Ring

Reliable Engine Oil Filler Cap O-Ring for GM Vehicles

The Dorman 42353 Engine Oil Filler Cap O-Ring is designed to provide a secure seal for the oil filler cap on select Buick, Cadillac, Chevrolet, Pontiac, and Saturn models. Engineered with durable HNBR 70 material, this o-ring ensures consistent performance and resistance to heat and oil degradation.

• Inside diameter: 37.5 mm for precise fitment
• Outside diameter: 46 mm to match OEM specifications
• Thickness: 4.25 mm for optimal sealing pressure
• Constructed from HNBR 70 material for enhanced durability
• Includes one o-ring per package

Durable Material and Precise Dimensions

This engine oil filler cap o-ring is made from HNBR 70, a hydrogenated nitrile butadiene rubber known for its excellent resistance to heat, oil, and chemicals commonly found in automotive environments. The 37.5 mm inside diameter and 46 mm outside diameter ensure a snug fit on the oil filler cap, preventing leaks and contamination. With a thickness of 4.25 mm, the o-ring maintains a reliable seal under varying engine conditions.

Compatible Vehicles and Applications

The Dorman 42353 o-ring is compatible with a range of GM vehicles, including Buick Astra, Cadillac CTS and ELR, Chevrolet Aveo, Cruze, Sonic, Trax, and Volt, Pontiac G3 and G5, and Saturn Vue and Aura models. This part is specifically designed to replace worn or damaged oil filler cap seals on these vehicles, helping maintain engine integrity.

• Prevents oil leaks around the engine oil filler cap
• Eliminates contamination from dirt and debris entering the engine
• Restores proper sealing on older or degraded oil filler caps
• Helps maintain engine oil pressure and cleanliness

Installation Notes and Tips

When replacing the oil filler cap o-ring, ensure the engine is cool to avoid burns. Remove the old o-ring carefully and clean the sealing surface to remove any oil residue or debris. Lubricate the new o-ring lightly with clean engine oil before installation to ensure a proper seal and ease of fitting. Verify the o-ring sits evenly in the groove before securing the oil filler cap.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 42353 Engine Oil Filler Cap O-Ring undergoes quality inspections to ensure durability and performance. While specific warranty details are not provided, Dorman typically offers limited warranties on their replacement parts to support customer confidence.