When the PDE is active in the cylinder head, a new gasket set is often not sufficient.

In many TDI engines with unit injector technology, the unit injector elements are fixed on one side due to their design. High mileage, vibrations, and thermal cycling can cause the PDEs to move and wear into the aluminum cylinder head.

The result: The seals are subjected to greater stress, the PDE seat can wear out, and fuel can leak past the seal. This is exactly where the ORIGINAL 07eins PD injector retainer come into play: They provide additional stabilization for the unit injector at the seat and reduce movement where the stress occurs.

VW Caddy 2.0 TDI with approximately 190,000 km on the odometer

The VW Caddy shown in the video is a typical example from workshop practice. With approximately 190,000 km on the odometer, the unit injector components are removed, cleaned, and inspected. This demonstrates how important a careful assessment of the seals, the seating surfaces, and the mechanical guidance is.

Matthias Stockinger demonstrates not only the installation of the 07eins PD injector retainer, but also the crucial Repair procedure: new expansion bolts, replaced sealing rings, controlled tightening, correct support dimension, and subsequent adjustment of the unit injector elements.

Installation guide with timestamps

An overview of the most important sections of the video. The chapters help you jump directly to the relevant steps.

• 00:05 Introduction and vehicle: VW Caddy 2.0 TDI
• 00:16 The well-known problem with the unit injector components
• 00:22 07eins Solution: PD injector retainer
• 00:50 Required parts: Gasket set, expansion bolts, and body mounts
• 01:08 Remove the valve cover to gain access
• 01:
31
• Set the engine to top dead center (TDC)
• 02:21 Diesel in the oil and rising oil level explained
• 03:42 Properly loosen the rocker arm shaft
• 05:31 Remove the PDE from the cylinder head Remove
• 06:00 Damaged gasket and wear on the PDE
• 07:02 Signs of wear on the cylinder head
• 12:18 Remove the original retaining plate
• 13:18 07eins PD injector retainer Install
• 13:33 Apply threadlocker and tighten to 2 Nm
• 15:00 Insert PDE without rubber gaskets and check for play
• 17:00 Observe tolerance of 0.3 to 0.5 mm
• 18:20 Insert PDEs permanently
• 19:32 Tighten PDE screws to 12 Nm
• 20:00 Rotation angle: 270° in three steps
• 21:35 Install rocker arm shaft with new expansion bolts
• 22:31 Rocker arm shaft: 20 Nm + 90°
• 24:37 Adjust rocker arm clearance on the PDE
• 26:38 First start after PDE installation
• 28:00 Oil change and test drive
• 28:14 Conclusion: PD injector retainer against PDE wear and rising oil level