Remove/install cylinder head

AR01.30-P-5800MCU

Remove/install cylinder head

27.11.2017

Engine

132.910 in model 451.3/4

2

Rear axle crossmember

7

Ratchet

12

Tensioning rail

3

Screw

8

Chain tensioner

13

Timing chain

4

Electrical connector

9

Screw

14

Camshaft sprocket

5

Mounting clip

10

Slide rail

15

Camshaft positioner

6

Bracket

11

Screw

B11/4

Coolant temperature sensor

Shown on removed engine

1

Cylinder head

16

Screw

17

Clamp

18

Coolant hose

19

Screw

20

Screw

21

Coolant pipe

22

Bracket

23

Electrical wiring harness

24

Intake manifold

25

Bolts

B6/1

Camshaft Hall sensor

Y49

Adjustable camshaft timing solenoid

1

Cylinder head

26

Cylinder head bolts

27

Cylinder head gasket

28

Valve tappet

29

Screw

30

Retaining plate

B11/4

Coolant temperature sensor

 

Remove/install

1

Check basic position of camshafts

AR05.20-P-6010MCU

2

Remove timing case cover

AR01.40-P-8000MCU

3

Support rear axle crossmember (2) in the middle with a telescopic lifter, remove screw/bolts (3) and lower rear axle crossmember (2)

 Use a suitable base.

 Screw/bolt, crossmember to integral carrier

*BA35.10-P-1003-01F

4

Disconnect electrical connection (4) on coolant temperature sensor (B114) and unclip retaining clip (5) from electrical wiring harness on holder (6)

5

Turn back ratchet (7) on chain tensioner (8) using a suitable screwdriver and lock chain tensioner (8) via the bore (arrow A)

Attach/remove retaining lock for engine

AR03.30-P-1600-06MCE

 In order to lock the chain tensioner (8), place a pin with a diameter of 1.5 mm into the bore (arrow A) in the chain tensioner (8).

 Installation:  Attach adapter to crankshaft, remove  retaining lock on starter ring gear and turn engine in direction of engine rotation through about two revolutions until the markings on the crankshaft sprocket and on the cylinder crankcase stand opposite each other. Then check whether the marking (arrow B) on the camshaft sprocket (14) and the marking (arrow C) on the camshaft positioner (15) stand opposite each other; remove timing chain (13) if necessary and mount again anew.

 Retaining lock

*451589014000

 Adapter

*451589016300

If the cylinder head (1) was replaced the valve clearance must be checked and adjusted if necessary.





Set valve clearance

AP05.30-P-0560MCC

6

Remove screw/bolts (9) and remove slide rail (10)

 Bolt, timing chain slide rail to cylinder head

*BA05.10-P-1002-01P

 Bolt, timing chain slide rail to crankcase

*BA05.10-P-1003-01P

7

Remove screw/bolt (11) and remove tensioning rail (12)

 Bolt, timing chain tensioning rail to cylinder head

*BA05.10-P-1001-01P

8

Take off timing chain (13)

 Installation: Before mounting the timing chain (13), check whether the marking (arrow B) on the camshaft sprocket (14) and the marking (arrow C) on the camshaft positioner (15) are standing opposite each other. If this is not the case, the intake camshaft and the exhaust camshaft must be turned appropriately.

9

Lower vehicle with vehicle lift

10

Remove screw/bolt (16) and pull adjustable camshaft timing solenoid (Y49) out of cylinder head (1)


Cover oil holes on adjustable camshaft timing solenoid (Y49) to protect against ingress of foreign objects.
Ingress of foreign objects can cause engine damage.

 Bolt, camshaft solenoid to cylinder head

*BA05.20-P-1006-01M

11

Remove intake camshaft and exhaust camshaft

AR05.20-P-6992MCU

 The camshaft sprocket (14) remains on the exhaust camshaft.

12

Loosen clamp (17) and detach coolant hose (18) from connection fitting on cylinder head (1)

 Installation: Replace hose clamp (17).

13

Remove screw/bolt (19) and pull camshaft Hall sensor (B6/1) out of cylinder head (1)

 Screw/bolt, camshaft position sensor to cylinder head

*BA15.12-P-1004-01G

14

Remove screw/bolt (20) for coolant pipe (21) on cylinder head (1)

 Bolt, coolant line to cylinder head

*BA20.10-P-1011-01J

15

Detach holder (22) for electrical wiring harness (23) on intake manifold (24)

16

Remove screw/bolts (25) and detach air intake manifold (24) from cylinder head (1)

 Installation: Replace seals on intake manifold (24).

 Screw/bolt, intake manifold to cylinder head

*BA09.20-P-1001-01J

17

Loosen cylinder head bolts (26) in stages

Tightening procedure for cylinder head bolts

AR01.30-P-5800-01MCC

 Removal: Loosen cylinder head bolts (26) in reverse order of tightening procedure.

 Installation: Replace cylinder head bolts (26) and wet on thread and on bolt head contact surfaces with engine oil.

 Screw/bolt, cylinder head to crankcase

*BA01.30-P-1001-01K

18

Support engine on carrier for front engine suspension using a hand-operated hydraulic floor jack

 Use a suitable base.

19

Unhook chain for engine hoist on retaining plate (30)

 Retaining plates

*451589026300

20

Remove cylinder head bolts (26) and cylinder head (1) from cylinder crankcase

21

Remove cylinder head gasket (27) from crankcase

 Installation: Replace cylinder head gasket (27).

22

Remove valve tappet (28) from basic bores in cylinder head (1)


Do not use magnets.
Gathering of the smallest metal shavings can occur due to magnetization of the valve tappets (28) which can lead to damage of valve tappets (28) and intake camshaft or exhaust camshaft.

 Installation: The valve tappets (28) must be installed again at the same location.

23

Clean contact surfaces on cylinder head (1) and crankcase then check for visible damage and flatness

 In the event of complaints:



Replace cylinder head (1).

24

Clean threaded holes of cylinder head bolts (26) in crankcase

25

Remove screw/bolt (29) and remove retaining plate (30) from cylinder head (1)

When replacing the cylinder head (1).

 Retaining plates

*451589026300

26

Remove coolant temperature sensor (B11/4) from cylinder head (1)

When replacing the cylinder head (1).

 Coolant temperature sensor on cylinder head

*BA15.60-P-1002-01B

27

Install in the reverse order

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

28

Perform an engine test run and check engine for leaktightness in area around the cylinder head (1)

 Cylinder head

Number

Designation

Engine 132.9

BA01.30-P-1001-01K

Screw/bolt, cylinder head to crankcase

Stage 1

Nm

25

Stage 2

°

90

Stage 3

°

90

Stage 4

°

–

 Timing chain drive

Number

Designation

ENGINE 132.9

BA05.10-P-1001-01P

Bolt, timing chain tensioning rail to cylinder head

Nm

23

 Timing chain drive

Number

Designation

ENGINE 132.9

BA05.10-P-1002-01P

Bolt, timing chain slide rail to cylinder head

Nm

10

 Timing chain drive

Number

Designation

ENGINE 132.9

BA05.10-P-1003-01P

Bolt, timing chain slide rail to crankcase

Nm

10

 Camshaft

Number

Designation

ENGINE 132.9

BA05.20-P-1006-01M

Bolt, camshaft solenoid to cylinder head

Nm

11

 Intake manifold, intake manifold preheating

Number

Designation

Engine 132.910

BA09.20-P-1001-01J

Screw/bolt, intake manifold to cylinder head

Initial tightening torque

Nm

20

Retightening torque

Nm

20

 Electronic ignition with variable characteristics

Number

Designation

Engine 132.9

BA15.12-P-1004-01G

Screw/bolt, camshaft position sensor to cylinder head

Nm

11

 Temperature sensor

Number

Designation

Engine 132.9

BA15.60-P-1002-01B

Coolant temperature sensor on cylinder head

Nm

30

 Coolant pump, coolant thermostat

Number

Designation

Engine 132.9

BA20.10-P-1011-01J

Bolt, coolant line to cylinder head

Nm

24

 Rear axle carrier

Number

Designation

Model 451.3/4

BA35.10-P-1003-01F

Screw/bolt, crossmember to integral carrier

Nm

65