Positioning crankshaft at "“TDC”" with engine installed — AUDI

🧭 Before you start

Fits: Audi TT Mk1 (8N)

• Timing position: the crankshaft or camshaft is set and locked during this job

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• Turn crankshaft at central bolt on crankshaft sprocket in direction of engine rotation to TDC mark (arrow).
• Hose connections and hoses for charge air system must be free of oil and grease before assembly.Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.

🔧 Engine codes this applies to

📐 43 workshop diagrams for AJQ

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

📋 Procedure

1. Take off engine cover panel (arrows).
2. Unscrew bolt (1) and remove cover over coolant expansion tank (arrow).
3. Remove air pipe (arrows).
4. Unplug electrical connector (arrow) at Hall sender G40.
5. Remove toothed belt cover (top).

6. Remove front left cover (arrows).
7. If fitted, detach air hose (1) (leading to secondary air pump) at air cleaner housing.
8. Release hose clip (2) and detach air intake hose from air mass meter G70.
9. Unplug electrical connector at air mass meter G70 (item 3).
10. Unscrew bolts (4) and (5) and remove air cleaner housing.
11. Pull out sealing plug at gearbox.
12. Remove centre noise insulation (1 ... 3).
13. Remove right noise insulation (arrows).
14. Pull out sealing plug at gearbox.
15. Turn crankshaft at central bolt on crankshaft sprocket in direction of engine rotation to TDC mark (arrow).
16. Rotate crankshaft one turn further if necessary. [Note: Hose connections and hoses for charge air system must be free of oil and grease before assembly. Secure all hose connections with the correct type of hose clips (same as original equipment) Parts catalogue.]

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