FASTENER TIGHTENING SPECIFICATIONS
| Component | Bolt Size | Nm |
|---|---|---|
| Balance Shaft, Exhaust Side (2) | 9 | |
| Balance Shaft, Intake Side (2) | 9 | |
| Bearing Bracket (1) , (2) | ||
| 9 | ||
| M6 | 8 + 90° | |
| M8 | 20 + 90° | |
| Camshaft Adjuster Actuator | 5 | |
| Camshaft Position Sensor | 9 | |
| Camshaft Timing Chain Guide Rail, Guide Pins | 20 | |
| Chain Tensioner (4) | 9 | |
| Chain Tensioner (3) | 65 | |
| Control Valve | 35 | |
| Engine Lifting Eye | 25 | |
| Guide Rail for Timing Chain, Guide Bolts | 20 | |
| Heat Shield (5) , (6) | ||
| 9 | ||
| 20 | ||
| Mounting Plate | 9 | |
| Oil Dipstick Guide Tube | 9 | |
| Retaining Plate | 9 | |
| Sealing Plugs | 5 | |
| Tensioning Rail for Timing Chain, Guide Bolts | 20 | |
| Timing Chain Tensioning Rail, Guide Bolts | 20 | |
| (1) For bolt tightening clarification, refer to CAMSHAFT TIMING CHAIN OVERVIEW and see items -5 and 7- (2) Always replace (3) For bolt tightening clarification, refer to BALANCE SHAFT TIMING CHAIN OVERVIEW and see items -4- (4) For bolt tightening clarification, refer to CAMSHAFT TIMING CHAIN OVERVIEW and see items -2- (5) For bolt tightening clarification, refer to CYLINDER HEAD OVERVIEW and see items -13, 15 and 16- (6) For bolt tightening clarification, refer to CYLINDER HEAD OVERVIEW WITH AVS and see items -16, 18 and 19 | ||
| (1) | For bolt tightening clarification, refer to CAMSHAFT TIMING CHAIN OVERVIEW and see items -5 and 7 |
| (2) | Always replace |
| (3) | For bolt tightening clarification, refer to BALANCE SHAFT TIMING CHAIN OVERVIEW and see items -4 |
| (4) | For bolt tightening clarification, refer to CAMSHAFT TIMING CHAIN OVERVIEW and see items -2 |
| (5) | For bolt tightening clarification, refer to CYLINDER HEAD OVERVIEW and see items -13, 15 and 16 |
| (6) | For bolt tightening clarification, refer to CYLINDER HEAD OVERVIEW WITH AVS and see items -16, 18 and 19 |
Intermediate Shaft Sprocket Tightening Sequence
| CAUTION | Always replace the intermediate shaft sprocket. Otherwise the backlash will not adjust itself and it could result in engine damage. The new intermediate shaft sprocket has an anti-friction coating that wears off after a short period of use, which automatically adjusts the backlash. |
Tighten with a new bolt as follows
Tighten to 10 Nm using a torque wrench.
Rotate the intermediate shaft sprocket.
The intermediate shaft sprocket must not have any play. Loosen and tighten it again if necessary.
Tighten to 25 Nm using a torque wrench.
Tighten further 90° using a rigid wrench.
Crankcase Ventilation, Tightening Sequence
Note. The bolts are self-tapping. Only use original bolts when replacing the cylinder head, since the cylinder head is delivered without a thread for the installing the crankcase ventilation. It is not permitted to cut the thread with a thread cutter.
Tighten the crankcase ventilation bolts to 11 Nm in sequence -1 to 10-.
Cylinder Head with AVS Tightening Sequence
Tighten the cylinder head bolts in sequence -1 to 10-.
1. Tighten to 40 Nm using a torque wrench.
2. Tighten further 90° using a rigid wrench.
3. Tighten further 90° using a rigid wrench.
4. Tighten the bolts -arrows- to 8 Nm.
5. Tighten the bolts -arrows- 90° further using a rigid wrench.
Cylinder Head without AVS Tightening Sequence
Tighten the cylinder head bolts in sequence -1 to 5-.
1. Tighten to 40 Nm using a torque wrench.
2. Tighten further 90° using a rigid wrench.
3. Tighten further 90° using a rigid wrench.
4. Tighten the bolts -arrows- to 8 Nm.
5. Tighten the bolts -arrows- 90° further using a rigid wrench.
Upper Timing Chain Cover - Tightening Sequence
Tighten the bolts in the sequence shown -1 through 5
1. Tighten the bolts to 9 Nm.
Lower Timing Chain Cover Tightening Sequence
Tighten the bolts -1 through 15- in 2 stages in the sequence shown
1. Tighten the bolts to 8 Nm.
2. Tighten the bolts an additional 45°.
Cylinder Head Cover with AVS Tightening Sequence
Replace the bolts.
1. Hand-tighten bolts in several stages in sequence -1 to 6-.
2. Tighten the bolts in sequence -1 to 6- to 8 Nm using a torque wrench.
3. Tighten the bolts an additional 90° using a rigid wrench in the sequence -1 to 6-.
Cylinder Head Cover without AVS Tightening Sequence
Replace bolts
1. Hand-tighten bolts in several stages in sequence -1 to 6-.
2. Tighten the bolts in sequence -1 to 6- to 8 Nm using a torque wrench.
3. Tighten the bolts an additional 90° using a rigid wrench in the sequence -1 to 6-.