Waterboxer Crankshaft Pulley

This genuine Volkswagen crankshaft pulley is designed for use on 1900cc and 2100cc petrol Waterboxer engines fitted to VW Type 25 / T3 buses. Mounted on the pulley end of the crankshaft, it plays a critical role in smooth engine operation by driving the ancillary systems and maintaining rotational balance at the front of the engine.

The crankshaft pulley bolts directly to the nose of the crankshaft and transfers engine rotation to driven components such as the alternator via the drive belt. On Waterboxer engines, correct pulley alignment and balance are essential to minimise vibration, ensure accurate belt tracking, and protect the crankshaft main bearings and oil seals from premature wear.

Manufactured to original VW specifications, this pulley offers a precise fit on both 1.9L (1900cc) and 2.1L (2100cc) Waterboxer engines. Its robust steel construction is designed to withstand constant rotational loads, heat cycles, and long-term use without distortion or cracking. Being a genuine VW part, it guarantees the correct dimensions, offset, and sealing surface for proper interaction with the pulley-end crankshaft oil seal.

It is ideal for engine rebuilds, restoration projects, or replacing worn or damaged pulleys that may cause belt noise, vibration, or oil leaks.

Fitting & Related Parts

For best results during installation, consider the following:

• Inspect or replace the pulley-end crankshaft oil seal while the pulley is removed

• Check the condition of the drive belt and replace if worn

• Ensure the pulley sealing surface is clean and free from corrosion or scoring

• Torque fixing bolts to VW-specified settings

This pulley is a direct replacement and installs without modification on compatible engines.

Applications

• Crankshaft Pulley – 1.9–2.1 Waterboxer Petrol Engines

• VW Type 25 / T3 Bus: 1983 – 1991