Elring 278.386 Engine Coolant Bypass Line Seal Ring

Engine Coolant Bypass Line Seal Ring for BMW M3, M5, M6

The Elring 278.386 Engine Coolant Bypass Line Seal Ring is designed to provide a reliable seal in the cooling system of BMW M3, M5, and M6 models. Manufactured from durable FPM (fluoride rubber), this O-ring ensures consistent performance under high temperature and pressure conditions.

• Inner diameter: 22 mm for precise fitment
• Outer diameter: 26 mm ensuring proper sealing surface
• Thickness: 2 mm for optimal compression and durability
• Material: FPM (fluoride rubber) resistant to heat and coolant fluids
• Shape: O-ring for effective sealing in coolant bypass lines

Durable FPM Material and Precise Dimensions

This Elring seal ring is crafted from FPM, a fluoride rubber known for its excellent resistance to heat, oils, and automotive coolants. The 22 mm inner diameter and 26 mm outer diameter dimensions are engineered to fit the coolant bypass line securely, preventing leaks and maintaining system integrity. The 2 mm thickness provides the necessary compression to form a tight seal without deformation over time.

Compatible BMW Models and Applications

Compatible with BMW M3, M5, and M6 models, the Elring 278.386 seal ring is specifically designed for the engine coolant bypass line. It helps address common issues such as:

• Coolant leaks around the bypass line connection
• Loss of coolant pressure affecting engine temperature regulation
• Degradation of old or worn sealing rings causing system inefficiency
• Preventing contamination ingress into the cooling system

Installation Notes and Tips

When installing the Elring 278.386 seal ring, ensure the mating surfaces are clean and free of debris. Lubricate the O-ring lightly with compatible coolant or lubricant to ease installation and prevent damage. Verify the seal ring is seated evenly to avoid leaks. Replacement should be done during coolant system maintenance or when leaks are detected.

Quality Assurance and Warranty

Elring parts are manufactured to meet OEM specifications, ensuring reliable fit and function. The 278.386 Engine Coolant Bypass Line Seal Ring undergoes strict quality control to maintain performance standards. Warranty coverage details should be confirmed with the point of purchase or manufacturer documentation.