A4 Mk3
| Sump, oil pump, balance shaft assembly - exploded view |
| 1 - | Sump |
| q | Removing and installing → Chapter |
| 2 - | Bolt |
| q | 10 Nm |
| 3 - | Intake connecting pipe |
| q | Clean strainer if dirty |
| 4 - | Bolt |
| q | 10 Nm |
| 5 - | O-ring |
| q | Renew |
| 6 - | Oil pump |
| q | Removing and installing → Chapter |
| q | Before installing, check that the two dowel sleeves for centring oil pump are fitted onto balance shaft assembly. |
| 7 - | Oil pump drive shaft |
| 8 - | Circlip |
| q | Must fit securely in groove |
| q | Renew circlip if damaged or stretched |
| 9 - | Drive gear for balance shaft |
| 10 - | Bolt |
| q | 20 Nm + 90° |
| q | Renew |
| 11 - | Hub |
| q | For idler gear |
| q | Renew |
| 12 - | Bolt |
| q | 90 Nm + 90° |
| q | Renew |
| 13 - | Thrust washer |
| q | For idler gear |
| q | Renew |
| 14 - | Idler gear |
| q | Renew |
| q | To achieve the correct backlash a suitably thick coating is already applied to the new idler gear. The required clearance is achieved when the coating is worn |
Caution
|
| q | Installation position: Part No. must be visible. |
| 15 - | Thrust washer |
| q | For idler gear |
| q | Renew |
| q | Note installation position → Fig. |
| q | If necessary, apply grease and attach to housing to install idler gear |
| 16 - | Spur gear |
| q | Pulling spur gear off crankshaft and shrink-fitting new spur gear → Chapter |
| 17 - | Dowel sleeves |
| q | Dowel sleeves for centring balance shaft assembly to cylinder block |
| 18 - | Balance shaft assembly |
| q | Removing → Chapter |
| q | Installing new balance shaft assembly → Chapter |
| q | Re-installing used balance shaft assembly → Chapter |
| q | Before installing, check that the two dowel sleeves for centring balance shaft assembly are fitted onto cylinder block. |
| 19 - | Bolt |
| q | Renew |
| q | Tightening sequence - balance shaft assembly with eight attachment points → Fig. |
| q | Tightening sequence - balance shaft assembly with six attachment points → Fig. |
| 20 - | Oil intake pipe |
| 21 - | Bolt |
| q | 10 Nm |
| 22 - | Bolt |
| q | 40 Nm |
| 23 - | Bolt |
| q | 15 Nm |
| q | Tighten in stages and in diagonal sequence |
| 24 - | Seal |
| q | Renew |
| 25 - | Oil drain plug |
| q | 30 Nm |
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| Stage | Bolts | Tightening torque/angle specification |
| 1. | -1 … 8- | Screw in hand-tight in this sequence |
| 2. | -1 … 8- | Pre-tighten in this sequence to 6 Nm |
| 3. | -1 … 4- | Tighten to 20 Nm |
| 4. | -5- | Tighten to 13 Nm |
| 5. | -6- | Tighten to 20 Nm |
| 6. | -7- | Tighten to 13 Nm |
| 7. | -8- | Tighten to 20 Nm |
| 8. | -1 … 8- | Use rigid wrench to turn 90° further in this sequence |
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| Stage | Bolts | Tightening torque/angle specification |
| 1. | -1 … 6- | Screw in hand-tight in this sequence |
| 2. | -1 … 6- | Pre-tighten bolts in this sequence to 6 Nm |
| 3. | -1 … 4- | Tighten to 20 Nm |
| 4. | -5 and 6- | Tighten to 13 Nm |
| 5. | -1 … 6- | Use rigid wrench to turn 90° further in this sequence |
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