Waterboxer Cylinder Head Stud - Top - 191mm

This 191mm cylinder head stud is a direct replacement for the top row of cylinder head studs on Volkswagen Type 25 (T3) Transporters fitted with 1.9 and 2.1 Waterboxer (WBX) engines. It is manufactured to the correct length and specification to ensure proper clamping force and long-term engine reliability.

Sold individually, this stud allows you to replace only what’s required during maintenance or a full engine rebuild.

What this part does

Cylinder head studs secure the cylinder heads to the engine case, maintaining an even clamping load across the head. This is essential for sealing combustion pressure and coolant passages on Waterboxer engines. The top-row studs are critical for maintaining consistent head torque and preventing leaks or head gasket failure.

How it works

Threaded into the engine case, the stud provides a fixed anchor for the cylinder head nuts. When torqued in sequence to factory specifications, it ensures the cylinder head remains securely clamped under all operating conditions. The 191mm length is specific to the upper row positions on WBX engines.

Key specifications

• Stud length: 191mm

• Position: Top row cylinder head stud

• Quantity: Sold individually

• Required per engine: 4 studs

• Engine type: Waterboxer (WBX)

Important fitting note

To complete the full top row of cylinder head studs, you will also require:

• 4 × 175mm cylinder head studs

  • VW part number: 025101143B

Both stud lengths are required to correctly complete the upper row.

Engine compatibility

Suitable for 1.9 & 2.1 WBX engines, including engine codes:

• DF – 1.9

• DG – 1.9

• DH – 1.9

• GW – 1.9

• SP – 1.9

• EY – 1.9

• DJ – 2.1

• SR – 2.1

• MV – 2.1

• SS – 2.1

Vehicle applications

• Volkswagen Type 25 / T3 Transporter: 1983–1992

Fitting recommendations

• Always inspect engine case threads before installation

• Replace studs in matched sets where possible during rebuilds

• Use new head nuts and washers if required

• Follow the correct torque sequence and specifications for WBX engines

This 191mm Waterboxer cylinder head stud is an essential component for maintaining proper head sealing and dependable performance on VW T3 / Type 25 Transporters.