Rubber Metal Front Crankshaft Seal Component 11118604931 BMW Engine Repair Kit OEM

BMW Front Crankshaft Oil Seal 1111 8604 931 Engine Repair Kit OEM

The BMW Genuine Front Crankshaft Oil Seal 1111 8604 931 is a critical sealing component located at the front of the engine crankshaft. It prevents oil leakage and ensures the proper sealing of the crankcase. Made from high-quality rubber and metal composite materials, this oil seal offers excellent resistance to high temperatures, wear, and aging, making it suitable for the demanding conditions of high-speed engine operation.

Manufacturing Process

1.Material Selection

Seal Lip Material: Premium Fluorocarbon Rubber (FKM) with exceptional high-temperature resistance (-40°C to +250°C) and chemical stability (resists oil, coolant, fuel additives).

Metal Housing: Precision zinc-plated steel ring, stamped to maintain dimensional tolerance ≤0.05mm.

2.Production Steps

Injection Molding: FKM compound is injected at 160°C, bonding permanently with the metal housing.

Laser Trimming: Seal lip undergoes laser micro-finishing for 0.01mm-level circularity accuracy.

Dynamic Balancing Test: Simulated at 3,000 rpm to verify radial runout (<0.1mm tolerance).

Surface Treatment: PTFE (Teflon) coating applied to the sealing edge, reducing initial friction coefficient (μ<0.15).

Quality Control

1.100% Air Leak Test: ≤0.05ml/min leakage at 2bar pressure.

2.Salt Spray Test: 720-hour neutral salt spray resistance (ISO 9227).

3.Engine Validation: 500-hour full-load bench testing on N54 engines.

MW Front Crankshaft Oil Seal 1111 8604 931 Vehicle Compatibility Chart