Engine Code BLV
Chain Drive Overview
1 Control Housing
• Oil the contact surface of the seals before installing.
• Removing and installing, refer to => [ Camshafts ] Service and Repair.
• Camshaft adjustment valve removing and installing, refer to => [ Camshaft Adjustment Valves ] Camshaft Adjustment Valves.
• Check the control housing strainer for contamination before installation. Refer to => [ Checking the Strainer for Contaminants ] Control Housing Overview.
2 Bolt
• 8 Nm + an additional 90° (1/4) turn.
• Install using liquid locking fluid (D 000 600 A2)
3 Timing Chain
• For the camshafts.
• Mark the direction of rotation before removing (installed position).
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
4 Exhaust Camshaft Adjuster
• Identification: 32A
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
5 Seal
• Always replace.
6 Oil Pump
• Removing and installing, refer to => [ Oil Pump ] Oil Pump.
7 Bolt
• 8 Nm
• Always replace.
8 Tensioning Rail
• For the camshaft timing chain - item 3 -.
9 Chain Tensioner
• 50 Nm
• For the camshaft timing chain - item 3 -.
• Only rotate the engine with the chain tensioner installed.
10 Seal
• Replace if damaged or leaking.
11 Pin
• 10 Nm
• For the tensioning rail - item 8 -.
12 Chain Sprocket
• For the oil pump timing chain - item 17 -.
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
13 Chain Sprocket
• For the camshaft timing chain - item 3 -.
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
14 Bolt
• 60 Nm + an additional 90° (1/4) turn.
• Always replace.
• Only use bolts with a strength category of 10.9.
15 Chain Tensioner with Tensioning Rail
• For the oil pump timing chain - item 17 -.
• Before installation, release the locking device in the chain tensioner using a small screwdriver and press the tensioning rail against the chain tensioner.
• Only rotate the engine with the chain tensioner installed.
16 Drive Sprocket
• Integral part of the crankshaft.
• The milled tooth aligned with the crankshaft main bearing cap joint = Top Dead Center (TDC) for cylinder 1. Refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
17 Timing Chain
• For the oil pump.
• Mark the direction of rotation before removing (installed position).
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
18 Guide Rail
• For the oil pump timing chain - item 17 -.
• Remove and install together with the timing chains. Refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
19 Pin, without Collar
• 10 Nm
• For the guide rail - item 18 -.
20 Pin
• 10 Nm
21 Bolt
• 23 Nm
22 Bolt
• 60 Nm + an additional 90° (1/4) turn.
• Always replace.
• The sensor wheel contact surface on the bolt head must be dry when installing.
• When removing and installing, counter hold the camshaft using a 27 mm open end wrench. Refer to => [ Camshafts ] Service and Repair.
23 Guide Rail
• For the camshaft timing chain - item 3 -.
24 Drive Sprocket
• For the high pressure pump.
25 Intake Camshaft Adjuster
• Identification: 24E
• Installing, refer to => [ Camshaft and Oil Pump Timing Chains ] Camshaft and Oil Pump Timing Chains.
26 Exhaust Camshaft Adjustment Valve 1 (N318)
• For the exhaust camshaft.
• Mark the connector belonging to the component before disconnecting.
• Removing and installing, refer to => [ Camshaft Adjustment Valves ] Camshaft Adjustment Valves.
27 Camshaft Adjustment Valve 1 (N205)
• For the intake camshaft.
• Mark the connector belonging to the component before disconnecting.
• Removing and installing, refer to => [ Camshaft Adjustment Valves ] Camshaft Adjustment Valves.
28 Guide Rail
• For the camshaft timing chain - item 3 -.
• Clipped into the control housing.
Identifying the Timing Chains
- Mark the timing chains before removing (for example, with a paint arrow pointing in the direction of rotation).
• Do not mark the chain using a center punch or similar means!