BMW E90 F30 Car Engine Seals Cylinder Head Water Pipe O Ring 11537505806 11537505805 11537505807

Engine Cylinder Head Water Pipe O-Ring  11537505806 11537505805 11537505807 For BMW E90 F30 E60 F10 F25 E70 E82 E88 

1.Vehicle Compatibility Table

2.Product Features

• Precision Fit: OEM-equivalent dimensions (Ø28.5×3.5mm) for perfect sealing

• High-Temp Material: Fluoroelastomer (FKM) withstands -30°C to +200°C

• Coolant Resistant: Chemically stable with BMW-approved coolants

• Pressure Rated: 3 bar static / 1.5 bar dynamic pressure capacity

• Longevity: 50,000+ mile service life under normal conditions

3.Key Advantages

•  Leak Prevention: 100% sealing efficiency in coolant circulation
•  Engine Protection: Prevents overheating and coolant loss
•  OE Matching: Direct replacement for BMW 11537505806
• Cost Effective: 40% cheaper than dealer parts with equal quality

4. Manufacturing Process

• Material Compounding: FKM rubber mixed with thermal stabilizers
• Precision Molding: Computer-controlled injection molding (±0.05mm tolerance)
• Post-Curing: 4-hour vulcanization at 180°C for optimal elasticity
• QC Inspection: 100% pressure testing and dimensional verification
• Packaging: Individual blister packs with anti-UV coating

5. Primary Applications

• Seals coolant transfer between cylinder head and water pipe

• Maintains pressurized cooling system integrity

• Compatible with BMW's N-series turbocharged engines

• Critical for preventing coolant-air mixture in the system

6.Installation Notes

• Always clean sealing surfaces before installation

• Lubricate with coolant (never petroleum grease)

• Replace whenever coolant hoses are serviced

• Torque water pipe bolts to 10Nm ±1Nm