222mm Bottom Cylinder Head Stud - Type 4 + Waterboxer Engines

This 222mm cylinder head stud is used on the bottom row of all Type 4 aircooled engines (1700cc, 1800cc, and 2000cc) fitted to Baywindow Buses and early aircooled Type 25 (T3) Buses. It is also correct for all Waterboxer (WBX) 1900cc and 2100cc engines, making it a versatile and essential component for multiple Volkswagen engine rebuilds.

Sold individually, this stud allows flexible ordering—ideal whether you’re replacing a single damaged stud or completing a full engine overhaul.

What this part does

Cylinder head studs clamp the cylinder heads securely to the engine case, maintaining critical sealing for combustion, coolant (on WBX engines), and oil passages. The bottom-row studs are especially important due to their exposure to heat cycles and corrosion. Worn, stretched, or corroded studs can lead to head leaks, loss of compression, and long-term engine damage.

How it works

Threaded into the engine case, the stud provides a fixed anchor point for the cylinder head nuts. When torqued correctly, it delivers even clamping force across the head, ensuring proper sealing and engine reliability. The 222mm length is specific to the lower row applications listed below.

Key specifications

• Stud length: 222mm

• Position: Bottom row cylinder head stud

• Quantity: Sold individually

• Requirement: 8 studs per engine (Type 4 and WBX)

• Quality: Durable replacement suitable for rebuilds

Engine compatibility

Type 4 – Aircooled

• 1700cc

• 1800cc

• 2000cc

• 8 required per engine

Waterboxer (WBX)

• 1.9

• 2.1

• 8 required per engine

Vehicle applications

• VW Baywindow Bus (T2): 1972–1979

• VW Type 25 / T3: 1980–1992 (aircooled & WBX)

• Porsche 914: 1970–1976

Fitting notes

• Always inspect threads in the engine case before installation

• Recommended to replace studs as a matched set during a rebuild

• Use correct torque sequence and specifications for your engine type

• Consider replacing head nuts and washers at the same time

This 222mm cylinder head stud is a vital component for ensuring proper clamping force and long-term reliability in both Type 4 and Waterboxer Volkswagen engines.