Audi a3 cambelt (timing belt) change instructionts . Full guide!
Аudi А3 Cambelt Change Interval
- →2003MY: No manufacturer’s recommended replacement interval.NOTE: Audi UK recommend the timing belt is replaced every 5 years.
- 2004MY→: Audi recommend replacement every 75,000 miles or 5 years.
- The previous use and service history of the vehicle must always be taken into account.
Check For Engine Damage
- CAUTION: This engine has been identified as an INTERFERENCE engine in which the possibility of valve-to-piston damage in the event of a timing belt failure is MOST LIKELY to occur.
- A compression check of all cylinders should be performed before removing the cylinder head(s).
Repair Times – hrs
Remove & install | 2,20 |
Special Tools
- Engine support – No.10-222A.
- Two-pin wrench – No.T10020.
Special Precautions
- Disconnect battery earth lead.
- DO NOT turn crankshaft or camshaft when timing belt removed.
- Remove spark plugs to ease turning engine.
- Turn engine in normal direction of rotation (unless otherwise stated).
- DO NOT turn engine via camshaft or other sprockets.
- Observe all tightening torques.
Removal
- Raise and support front of vehicle.
- Remove:
- Engine undershield.
- RH front wheel.
- RH front inner wing panel.
- Engine upper cover.
- Disconnect:
- Vacuum pipe to evaporative emission (EVAP) canister.
- Fuel supply pipe.
- Move evaporative emission (EVAP) canister to one side.
- Remove:
- Evaporative emission (EVAP) canister bracket.
- Windscreen washer reservoir filler neck.
- Disconnect coolant expansion tank multi-plug.
- Remove:
- Coolant expansion tank. DO NOT disconnect hoses.
- Auxiliary drive belt splash shield.
- Auxiliary drive belt. Lock tensioner in position. Use Allen key.
- Auxiliary drive belt tensioner.
- Timing belt upper cover [1] .
- Turn crankshaft to TDC on No.1 cylinder.
- Ensure crankshaft pulley timing marks aligned [2] .
- Ensure camshaft sprocket timing marks aligned [3] .
- Remove:
- Crankshaft pulley bolts [4] .
- Crankshaft pulley [5] .
- Timing belt centre cover [6] .
- Timing belt lower cover [7] .
- Install engine support. Tool No.10-222A.
- Remove:
- RH engine mounting bolts [8] , [9] & [10] .
- RH engine mounting.
- RH engine mounting bracket bolts [11] .
- RH engine mounting bracket [12] .
NOTE: Engine may need to be raised/lowered slightly.
- Slacken tensioner nut [13] . Turn tensioner clockwise away from belt. Use tool No.T10020 [14] . Lightly tighten nut [13] .
- Remove timing belt.NOTE: Mark direction of rotation on belt with chalk if belt is to be reused.
Installation
- Ensure camshaft sprocket timing marks aligned [3] .
- Fit timing belt to crankshaft sprocket and water pump sprocket.
- Install:
- Timing belt lower cover [7] .
- Timing belt centre cover [6] .
- Crankshaft pulley [5] .
- Crankshaft pulley bolts [4] .
- Tighten crankshaft pulley bolts [4] . Tightening torque: 10 Nm + 90°. Use new bolts.
- Ensure crankshaft pulley timing marks aligned [2] .
- Fit timing belt to tensioner pulley and camshaft sprocket.NOTE: Ensure belt is taut between sprockets on non-tensioned side.
- Ensure tensioner retaining lug is properly engaged [15] .
- Slacken tensioner nut [13] .
- Turn tensioner twice fully anti-clockwise and clockwise from stop to stop. Use tool No.T10020 [14] .
- Turn tensioner anti-clockwise until pointer [16] aligned with notch [17] in baseplate. Use tool No.T10020 [14] .
- Tighten tensioner nut [13] . Tightening torque: 23 Nm.
- Turn crankshaft two turns clockwise to TDC on No.1 cylinder.NOTE: Turn crankshaft last 45° smoothly without stopping.
- Ensure camshaft sprocket timing marks aligned [3] .
- Ensure crankshaft pulley timing marks aligned [2] .
- Ensure pointer [16] aligned with notch [17] in baseplate.
- If not: Repeat tensioning procedure.
- Apply firm thumb pressure to belt at . Pointer [16] and notch [17] must move apart.
- Release thumb pressure from belt at .
- Turn crankshaft two turns clockwise to TDC on No.1 cylinder.NOTE: Turn crankshaft last 45° smoothly without stopping.
- Ensure camshaft sprocket timing marks aligned [3] .
- Ensure crankshaft pulley timing marks aligned [2] .
- Ensure pointer [16] aligned with notch [17] in baseplate.
- Install:
- RH engine mounting bracket [12] .
- RH engine mounting bracket bolts [11] .
- Tighten RH engine mounting bracket bolts [11] . Tightening torque: 45 Nm.
- Fit and align RH engine mounting:
- Engine mounting clearance: 16 mm [18] .
- Ensure engine mounting aligned parallel with engine mounting bracket [19] .
- Tighten:
- Engine mounting bolts [9] . Tightening torque: 40 Nm + 90°. Use new bolts.
- Engine mounting bolts [8] . Tightening torque: 20 Nm + 90°. Use new bolts.
- Engine mounting bolts [10] . Tightening torque: 60 Nm + 90°. Use new bolts.
- Install components in reverse order of removal.NOTE: The manufacturer recommends bleeding the fuel system before starting engine.