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Camshaft Timing Chains, Assembly Overview






Camshaft Timing Chains, Assembly Overview






1 Control housing

Removing and installing => [ Camshafts ] Service and Repair.

Disassembling and assembling => [ Disassembling and Assembling Control Housing ] Valvetrain Assembly Overview

Check screen for dirt => [ Control Housing Screen, Cleaning ] Valvetrain Assembly Overview

Lightly lubricate contact surfaces of oil seals before installing

2 Bolt

Replace

8 Nm

3 Camshaft timing chain

Before removing, mark direction of rotation with paint => [ Identify Timing Chain Direction of Rotation ]

Remove from camshafts => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

Removing and installing => [ Camshaft Timing Chain ] Camshaft Timing Chain.

4 Camshaft adjuster, exhaust side

Identification: "32A"

Removing and installing => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

5 O-ring

Replace

6 Oil pump

Removing and installing => [ Oil Pump ] Oil Pump.

7 Bolt

Tightening specifications => [ Oil Pump, Assembly Overview ] Oil Pump, Assembly Overview.

8 Timing chain tensioning rail

Remove to remove and install timing chain upper and lower covers

9 Camshaft timing chain tensioner

Removing and installing => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

Only rotate engine with chain tensioner installed

40 Nm

10 Seal

Replace if damaged or leaking

11 Mounting pin

Without collar

For tensioning rail - 8 -

18 Nm

12 Timing mechanism drive chain sprocket

Removing and installing => [ Timing Mechanism Drive Chain ] Timing Mechanism Drive Chain.

13 Camshaft timing chain sprocket

Removing and installing => [ Timing Mechanism Drive Chain ] Timing Mechanism Drive Chain.

14 Bolt

Use counter hold (T10069) on vibration damper to loosen and tighten

Replace

60 Nm + 1/4 additional turn (90°).

15 Chain tensioner with tensioning rail

For drive chain

Before installation release locking device in chain tensioner with a small screwdriver and press tensioning plate against chain tensioner

Only rotate engine with chain tensioner installed

16 Drive sprocket

Integral part of crankshaft

Ground down tooth faces in "TDC" position toward bearing joint

17 Drive chain for timing mechanism

Before removing, mark direction of rotation with paint => [ Identify Timing Chain Direction of Rotation ]

Removing and installing => [ Timing Mechanism Drive Chain ] Timing Mechanism Drive Chain.

18 Timing mechanism drive chain guide rail

19 Mounting pin

Without collar

For guide rail - 18 -

10 Nm

20 Mounting pin

With collar

For guide rail - 23 -

10 Nm

21 Bolt

23 Nm

22 Bolt

To loosen and tighten, counter hold with open end wrench at camshaft wrench surface => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

Replace

Contact surface of sensor wheel at screw head must be dry when installing

60 Nm + 1/4 additional turn (90°).

23 Camshaft timing chain guide rail

Removing and installing => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

24 High pressure pump drive chain sprocket

Different versions

On the version for vehicles without mechanical vacuum pump, lightly lubricate needle bearing side before installing

25 Camshaft adjuster, intake side

Identification: "24E"

Removing and installing => [ Camshaft Timing Chain, Removing from Camshafts ] Camshaft Timing Chain, Removing From Camshafts.

26 Camshaft adjustment valve 1 (exhaust) (N318)

For exhaust camshaft

Mark electrical connector before disconnecting

27 Camshaft adjustment valve 1 (N205)

For intake camshaft

Mark electrical connector before disconnecting

28 Camshaft timing chain guide rail

Clipped in at control housing

Identify Timing Chain Direction of Rotation





- Mark timing chain running direction with arrows using paint - arrows - for reinstallation.

Risk of damaging timing chain.

Do not mark chain with punch, notch or something similar.