Baywindow Bus Alternator Seal - Type 4 Engines

This replacement alternator seal is designed for Volkswagen Baywindow Buses fitted with Type 4 aircooled engines. It is a direct-fit seal that sits around the alternator where it passes through the engine tinware, helping to maintain correct cooling airflow and engine bay sealing.

What this part does

The alternator seal prevents hot air from the exhaust and lower engine area from being drawn back into the cooling system. On aircooled engines, maintaining a sealed engine bay is critical—any missing or damaged seals can cause increased engine temperatures, reduced cooling efficiency, and potential long-term engine damage.

How it works

Fitted between the alternator and the engine tin, the rubber seal closes the gap around the alternator body. This ensures that the cooling fan only draws in cooler, fresh air from above the engine rather than recirculating hot air from below. A flexible but snug fit allows for engine movement while maintaining an effective seal.

Key features

• Correct profile for Type 4 alternator installations

• Helps maintain proper engine cooling airflow

• Prevents hot air recirculation

• Ideal replacement for hardened, cracked, or missing original seals

• Good quality reproduction suitable for restorations and regular use

Vehicle compatibility

• VW Baywindow Bus: 1973–1979

• Engine type: Type 4 aircooled

Fitting notes

• Designed for standard Type 4 alternator setups

• Best replaced whenever the alternator is removed

• Ensure surrounding engine bay seals are also in good condition for optimal cooling

This alternator seal is a small but vital component in keeping your Baywindow Type 4 engine running at the correct temperature and maintaining long-term reliability.