Part l (engine codes: AEH, AKL) — VW
Part l (engine codes: AEH, AKL) on VW: 17 steps, engines AEH, AKL, APF. What to remove, in what order, and what to check after.
Workshop procedure for VW — the exact step sequence and torque figures, straight from real workshop data.
🧭 Before you start
Fits: VW Golf IV / Bora (1J)
- Renewed: fuel tank cap
Don't miss
- Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
- If fuel level in tank is low the hand vacuum must be operated at least 20...30 times.
📋 Procedure
- Pull breather line (2) from activated charcoal filter (1) off at throttle valve control module (3).
- Connect hand vacuum pumpV.A.G 1390 to line (2).
- Pull breather line from fuel tank (5) off activated charcoal filter and connect to -connection A- of vacuum testerV.A.G 1368.
- Connect vacuum testerV.A.G 1368 -connection B- to breather line (4) to activated charcoal filter.
- Set vacuum tester to position (B).
- Start final control diagnosis and activate activated charcoal filter solenoid valve 1N80: 01.
- Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
- Check breather connection (6) on activated charcoal filter (1) for soiling, clean if necessary.
- Remove fuel filler cap from filler neck.
- Connect hand vacuum pumpV.A.G 1390 to vacuum testerV.A.G 1368 -connection B-.
- Set vacuum tester to -A/B- position.
- Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up.
- Check gravity valve .
- Check line (1) from fuel tank for blockage.
- Refit fuel filler cap.
- Operate hand vacuum pumpV.A.G 1390 several times. Vacuum must not build up. [Note: If fuel level in tank is low the hand vacuum must be operated at least 20...30 times.]
- Renew fuel tank cap.
Other VW procedures
- Removing and installing coolant pump · 53 torque figures
- Checking compression · 21 torque figures
- Installing drive plate · 10 torque figures
- Removing and installing fuel tank – VW Touran II · 3 torque figures
- Removing and installing fuel delivery unit – VW Tiguan I · 5 torque figures
- Removing engine · 41 torque figures
- Removing and installing camshaft – VW Golf Cabriolet · 47 torque figures
- Adjusting valve timing – VW Passat B5 · 83 torque figures
- Removing and installing camshafts – VW Passat B6 · 39 torque figures
- Removing and installing reservoir for windscreen and headlight washer system (without auxiliary heater)
Who makes these pages, and how
TorqFix was built by a mechanic — after a 2,700 km drive with five roadside repairs that no diagnostic tool could explain.
The figures on this page come from manufacturer workshop documentation and are shown as they are. The page is assembled automatically from that data — it is not written by an AI. The AI works in the chat, where it answers for your specific car. It writes nothing here.
Variants of the same model differ. Cross-check torque against the factory manual for your engine before final tightening.
Seen a figure that does not match your manual? Write to us — we correct it and note when. support@torqfix.com
The story behind TorqFix →Workshop data on this page last updated 20 Sep 2026.