Symptoms:

  • Chatter on acceleration
  • Ratio errors
  • Distress on pulley #1, #2 & chain surface

Cause:

Bore wear at the UV reduction valve allows pressure loss that compromises pulley control.

Correction:

Renew critical clearances and regain pulley control by reconditioning the bore and installing Sonnax oversized UV reduction valve kit.

01J, 01T

Oversized UV Reduction Valve Kit
Part No. 33741B-08K


You need this if... View Instructions Find a Distributor

Problems caused by UV reduction pressure leakage in Audi 01J and 01T units are common. As leakage increases, reaction time drops and pressure decreases at pulley #1 or pulley #2. Without proper control pressure and reaction timing, load on the chain decreases and slippage will occur. In other instances, the UV reduction damper pin may break causing further damage to the bore and end plug. The Sonnax oversized UV reduction valve kit 33741B-08K restores the critical hydraulic clearance between the valve and bore and prevents future wear with highly wear-resistant materials and annular grooves.

  • Valve is hardcoat anodized to reduce wear
  • Restores proper hydraulic sealing and OE pressure control
  • Valve
  • Damper Pin

Sonnax valve body layouts provide a detailed overview of individual units making it quick and easy to determine what’s available for the specific valve body you’re working on. See all Sonnax valve body layouts.

VW/Audi 01J Valve Body Layout

VW/Audi 01J Valve Body Layout

VW/Audi 01T Valve Body Layout

VW/Audi 01T Valve Body Layout
  • 01J, 01T Oversized UV Reduction Valve Kit 33741B-08K
  • 01J, 01T Oversized UV Reduction Valve Kit 33741B-08K
  • 01J, 01T Oversized UV Reduction Valve Kit 33741B-08K details

You need this if...

Vacuum testing at the port(s) indicated fails to hold the recommended minimum in-Hg, or if wear is visually detected.

01J, 01T Oversized UV Reduction Valve Kit Vacuum Test Locations
01J, 01T Oversized UV Reduction Valve Kit Vacuum Test Locations