Checking tandem pump - vehicles with 4-valve engine — AUDI

🔧 Engine codes this applies to

📋 Procedure

1. Pull dipstick (1) out of guide tube.
2. Lift engine cover panel at the sides (arrows 2) and pull off towards the front (arrow 3).
3. Re-insert dipstick in guide tube.
4. Lift off engine cover panel (outside (1) and inside (2)) by pulling up evenly.
5. Pull cover off air duct (release clips on sides) (arrows).

6. Unclip air duct at the bottom by releasing clips (arrows).
7. Detach air duct (bottom) together with air hose.
8. Unplug electrical connector (1) at air mass meter G70.
9. Detach vent hose (3) and air hose (2).
10. Unscrew bolt (4) and remove air cleaner housing.
11. ⚠ The fuel system is pressurised. Wrap a cloth around the connection before opening the system. Then release pressure by carefully loosening the connection.In extreme cases the temperature of the fuel lines and the fuel can be up to 100 °C after the engine is switched off. Allow the fuel to cool down before disconnecting the lines - danger of scalding.Wear protective gloves.Wear safety goggles. — Remove screw plug (arrow). [Note: Tandem pump is shown with engine removed for illustration purposes.]
12. Connect tandem pump testerVAS 5187 with banjo bolt VAS 5187/1A as shown in the illustration.
13. Re-install air cleaner housing with air mass meter.
14. Start engine.
15. Increase engine speed to 4000 rpm.
16. Read off pressure indicated on pressure gauge:
17. Clamp off return hose between fuel filter and tandem pump using hose clamp.
18. Increase engine speed to 4000 rpm.
19. Read off pressure indicated on pressure gauge:
20. Renew O-rings at unit injectors.
21. Renew tandem pump . [Note: After removing pressure tester, tighten screw plug to 25 Nm. Renew seal.]

Other AUDI procedures

• Removing and installing exhaust gas recirculation valve N18 with exhaust gas recirculation potentiometer G212
• Checking for leaks
• Checking charge air system for leaks
• Removing and installing bracket for ancillaries - vehicles with small engine support
• Removing and installing temperature sender before particulate filter G506
• Removing and installing toothed belt · 56 torque figures
• Removing engine · 41 torque figures
• Removing camshaft timing chain from camshafts · 38 torque figures
• Installing engine · 36 torque figures
• Removing and installing camshaft timing chain · 29 torque figures