Renewing Teflon seal and support washer on injector — VW

🧭 Before you start

Fits: VW Touran I (1T, 2003–2015), VW Golf V / Jetta (1K, 2003–2009), VW Tiguan I (5N, 2007–2016); platform code 5M1

Don't miss

• Before removing, lock vacuum actuator using a 2.5 mm drill bit.
• The Teflon seal (arrow) must not be oiled to install injector.
• Before installation, lock vacuum actuator using a 2.5 mm drill bit.After installation of lower part of intake manifold, remove 2.5 mm drill bit.

🔧 Engine codes this applies to

🔩 Torque settings

Values can differ between engine variants — check the code stamped on your block.

ℹ️ Always cross-check the exact figure against your vehicle's factory manual before final tightening — a wrong torque can damage the engine. These values are extracted from workshop data and may not cover every variant or revision.

📐 38 workshop diagrams for BLG

Real factory drawings for this job — timing marks, bolt locations and routing. Locked in the free view.

📋 Procedure

1. Remove intake manifold and lower part of intake manifold . [Note: Before removing, lock vacuum actuator using a 2.5 mm drill bit.]
2. Remove injectors .
3. Clean injector carefully.
4. Carefully cut open seal with a knife as shown (arrow). Avoid contact between knife blade and valve body under all circumstances.
5. Remove old seal and clean seal groove in area of seal (arrow). Remove coking deposits using a brass wire brush.

6. Fit new oil seal (1) onto assembly cone T10133/5. Using assembly sleeve T10133/6 (knurling points to seal (1)), gently slide seal onto assembly cone T10133/5 as far as possible.
7. Turn assembly sleeve T10133/6 around (knurling no longer points to seal) and push seal (1) to end of assembly cone T10133/5.
8. Now place assembly cone T10133/5 with seal onto injector from front. Slide seal further onto injector using assembly sleeve T10133/6.
9. Remove assembly sleeve T10133/6 and assembly cone T10133/5.
10. Slide seal into annular groove by hand.
11. Position spacer sleeve T10133/11 onto valve body.
12. Now push calibration sleeve T10133/7 over seal to stop onto spacer sleeve T10133/11.
13. Pull off calibration sleeve T10133/7 again.
14. Now push calibration sleeve T10133/8 over seal to stop onto spacer sleeve T10133/11.
15. Pull off calibration sleeve T10133/8 again.
16. Remove O-ring (3).
17. Cut support washer (2) open with a small pair of side cutters and remove it.
18. Pull spring element (1) off injector and replace with retaining plate T10133/12.
19. Place new support washer (1) onto assembly cone T10133/13 and position onto injector as shown.
20. Slide support washer (1) into first groove (arrow) on injector using calibration sleeve T10133/17 (knurled side points to injector).
21. Now turn calibration sleeve T10133/17 around (knurled side no longer points to injector). Slide calibration sleeve over support washer (1) in direction of (arrow) to stop on retaining plate T10133/12.
22. Pull calibration sleeve T10133/17 down again.
23. Now position a new spring element (1) for retaining plate T10133/12 and position a new O-ring (3) in front of support washer (2). [Note: The Teflon seal (arrow) must not be oiled to install injector.]
24. Install injectors .
25. Place lower part of intake manifold carefully on injectors and tighten securing bolts to 20 Nm . [Note: Before installation, lock vacuum actuator using a 2.5 mm drill bit.After installation of lower part of intake manifold, remove 2.5 mm drill bit.] — 20 Nm (15 lb-ft)
26. Install intake manifold .
27. Install regulating flap control unit J808 and throttle valve module J338.

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