ELRING 804.850 Engine Blocks

Overview of the ELRING 804.850 Engine Block

The ELRING 804.850 is a high‑performance crankshaft oil seal designed for use in a wide range of passenger and light commercial vehicles. It provides reliable sealing between the crankshaft and the engine block, preventing oil leakage while withstanding extreme temperatures, pressures, and vibration.

Key Functional Characteristics

• Sealing Surface: Precision‑machined to match the crankshaft flange, ensuring a tight fit that resists oil seepage under all operating conditions.
• Material Composition: Constructed from a blend of PTFE (polytetrafluoroethylene) and ACM (acrylic rubber), delivering excellent chemical resistance, low friction, and high temperature tolerance up to 200 °C.
• Dimensions: Standard size 85 mm × 105 mm × 12 mm, compatible with most VW, Audi, Ford, Skoda, Seat, Volvo, and Mercedes engines from the early 1980s through contemporary models.
• Installation Method: Fits into a pre‑drilled flange on the crankshaft; no additional hardware required. The seal’s inner lip engages the oil passage while the outer lip rests against the engine block.

Applications Across Vehicle Platforms

The ELRING 804.850 is engineered for a broad spectrum of engines, including:

• Volkswagen & Audi: Golf III (1H1), Polo II/III, Passat, Jetta, and the newer A4/A6 models.
• Ford: Focus on older Escort and Fiesta platforms where the crankshaft flange matches the seal’s geometry.
• Skoda & Seat: Octavia, Felicia, and various compact cars that share VW Group architecture.
• Volvo & Mercedes: Certain light‑truck and SUV engines with similar crankshaft designs.

Performance Advantages

When compared to conventional rubber seals, the ELRING 804.850 offers several distinct benefits:

• Extended Service Life: PTFE’s low wear properties reduce degradation, extending seal life by up to 30% under normal service intervals.
• Superior Oil Retention: The dual‑material construction creates a robust barrier against oil leakage even during high‑speed operation.
• Temperature Resilience: Maintains elasticity and sealing integrity from –40 °C to +200 °C, making it suitable for both cold climates and hot engine bays.
• Reduced Maintenance Costs: Fewer seal replacements mean lower labor hours and less downtime for fleet operators.

Installation Guide

1. Preparation: Clean the crankshaft flange and engine block surface with a solvent to remove oil, grease, or debris. Inspect for cracks or wear; replace if necessary.
2. Seal Placement: Align the seal’s inner lip with the crankshaft flange. Gently press the seal into place until the outer lip rests against the engine block.
3. Torque Specification: Tighten the crankshaft bolt to the manufacturer’s recommended torque (typically 80–100 Nm for most VW/Audi engines). This ensures proper compression of the seal without overstressing it.
4. Final Check: Verify that the seal is seated evenly and that no oil leaks during a short engine run. If leakage occurs, re‑install or replace the seal immediately.

Maintenance Tips

• Inspect the seal during routine oil changes; look for signs of wear such as cracks or hardening.
• Avoid using harsh chemicals that could degrade PTFE or ACM; opt for mild detergents compatible with engine oils.
• If the vehicle operates in extreme environments (high altitude, heavy load), consider replacing the seal at shorter intervals to maintain optimal performance.

Compatibility Summary

The ELRING 804.850 Engine Block is a versatile component that fits seamlessly into a wide array of engines across multiple manufacturers. Its robust construction, combined with precise engineering, makes it an essential part for ensuring engine reliability and longevity.

Conclusion

Choosing the ELRING 804.850 means investing in a seal that delivers consistent performance under demanding conditions. Whether you’re maintaining a classic VW Golf or servicing a modern Audi, this crankshaft oil seal provides the protection and durability required for optimal engine operation.