Opel/Vauxhall Astra-G 2.0 Turbo (Z20LET) Torque Specifications
Back to Astra Mk3 ModelsEngine code: Z20LET
Power: 140 kW (190hp) @ 5400 rpm
Production years: 2000-2001
Notes: R-Cat
Cylinder Head
Renew bolts: Yes
Tighten bolts in the following stages:
- 25 Nm
- 90°
- 90°
- 90°
- 15°
Engine Torque Specs
| Component | Torque |
|---|---|
| Main bearings | Apply sealant to grooves in rear main bearing cap. Use new bolts and tighten in the following stages: 50 Nm 45° 15° |
| Big end bearings | Use new bolts and tighten to 35 Nm + 45° + 15°. |
| Oil pump to cylinder block | 8 Nm |
| Sump bolts | Sump upper part to cylinder block = 20 Nm Sump upper part to transmission = 40 Nm Sump lower part to sump upper part = 8 Nm + 30° |
| Sump drain bolt | 10 Nm |
| Flywheel/driveplate | Use new bolts. Flywheel = 65 Nm + 30° + 15° Drive plate = 55 Nm + 30° + 15° |
| Clutch pressure plate | 15 Nm |
| Crankshaft pulley/damper centre bolt | 20 Nm |
| Camshaft sprocket/gear | Use new bolts and tighten in the following stages: 50 Nm 60° 15° |
| Camshaft carrier/cap | 8 Nm |
| Camshaft/rocker cover | 8 Nm |
| Inlet manifold to cylinder head | 22 Nm. Use new nuts/bolts. |
| Exhaust manifold to cylinder head | Use new nuts. Work from centre outwards and tighten in the following stages: 8 Nm Wait 5 minutes 8 Nm |
| Exhaust downpipe to manifold | 20 Nm |
| Water pump | 25 Nm |
| Spark plugs | 25 Nm |
| Fuel rail | 8 Nm |
| Crankshaft position (CKP) sensor/engine speed (RPM) sensor | 8 Nm |
| Camshaft position (CMP) sensor | 6 Nm |
| Engine coolant temperature (ECT) sensor | 10 Nm |
| Lambda sensor (Oxygen) | 40 Nm |
| Knock sensor (KS) | 20 Nm |
| Engine oil pressure switch | 40 Nm |
Chassis Tightening Torques
| Component | Torque |
|---|---|
| Front hub | Use new nut and tighten as follows: 120 Nm Slacken off 20 Nm + 80° If necessary, turn nut further to align split pin. |
| Front hub - wheel bearing housing bolts | 90 Nm + 30° + 15°. Clean thread and use nuts/bolts with locking fluid. |
| Rear hub - wheel bearing housing bolts | 50 Nm + 30° + 15°. Use new nuts. |
| Steering wheel | 20 Nm. Clean thread and use nuts/bolts with locking fluid. |
| Steering rack/box mounting | 45 Nm + 45° + 15°. Use new nuts/bolts. |
| Steering track rod end | 50 Nm. Use new nuts. |
| Brake disc to hub | Front: 4 Nm Hub assembly with integrated brake carrier = 7 Nm |
| Brake caliper to carrier | Front: 28 Nm |
| Brake caliper/carrier to hub | Front: 110 Nm. Clean thread and use bolts with locking fluid. |
| Brake disc to hub | Rear: 4 Nm |
| Brake caliper to carrier | Rear: 25 Nm. Clean thread, fit new bolts and apply locking fluid. |
| Brake caliper/carrier to hub | Rear: 100 Nm. Clean thread and use bolts with locking fluid. |
| Road wheels | 110 Nm. Lightly coat conical seat of bolt and mating surfaces between wheel centre hole and hub (use grease). Do NOT lubricate bolt thread. |
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