ar0130p5701cd

Remove/install cover on cylinder head

Type ar · topic 01.30 · version 0202 · 2017-05-03

Applies to: Model 166 with engine 651 Model 172 with engine 651 Model 204 with engine 651 Model 207 with engine 651 Model 212 with engine 651 Model 218 with engine 651 Model 221 with engine 651

Where it sits

Function group 1 Engine › 01 Complete engine, crankcase ventilation, cylinder head, crankcase › 01.30 Cylinder head — Series 166 · Series 172 · Series 204 · Series 207 · Series 212 · Series 218 · Series 221 · Series 651

EinPAS 15 Engine › 15.16 Cylinder head › 15.16.31 Cylinder head/cylinder head gasket — Series 166 · Series 172 · Series 204 · Series 207 · Series 212 · Series 218 · Series 221 · Series 651

AR01.30-P-5701CD

Remove/install cover on cylinder head

02.05.2017

Model

166 with engine 651

Model

172 with engine 651

Model

204 with engine 651

Model

207 with engine 651

Model

212 with engine 651

Model

218 with engine 651

Model

221 with engine 651

Remove/install cover on cylinder head

P01.10-2960-09

Shown on model 204.002

1

Electrical connection

4

Electrical connection

B28/8

Differential pressure sensor (DPF)

2

Screw/bolt

5

Bracket

3

Electrical connection

6

Screw/bolts

Remove/install cover on cylinder head

P01.30-2362-09

Shown on model 204.002

7

Partition wall

11

Sealing

15

Heat shield

8

Vacuum line

12

Electrical wiring harness

16

Nuts

9

Coolant hose

13

Expanding rivets

10

Battery cover

14

Bracket

Remove/install cover on cylinder head

P01.30-2349-08

Shown on model 204.002

17

Flexible exhaust gas recirculation pipe

20

Cover

A

Sealing area

18

Screw/bolts

21

Screw/bolts

19

Screw/bolts

22

Screw/bolts

Remove/install

Warning

Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.

Wear protective gloves, protective clothing and safety glasses, if necessary.

AS00.00-Z-0002-01A

Danger

Risk of explosion caused by fuel igniting. Risk of injury to skin and eyes caused by fuel spraying out at high pressure

Keep all ignition sources out of hazard area.
Do not carry out any work on system when it is pressurized.

AS07.16-Z-0001-01A

Warning

Risk of injury to skin and eyes suffering scalding from contact with hot coolantspray. Risk of poisoning from swallowing coolant.

Do not open cooling system unless coolant temperature is below 90 °C. Open cap slowly and release the pressure. Do not pour coolant into beverage containers.
Wear protective gloves, protective clothing and safety glasses.

AS20.00-Z-0001-01A

Topical note

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

1

Remove cylinder head cover trim

2

Drain coolant at radiator


MODEL 166

AR20.00-P-1142GQ

MODEL 172, 204, 207

AR20.00-P-1142CW

MODEL 212 (except 212.098/298), 218, 221

AR20.00-P-1142OMA

Installation:
Do not check the pressure of the cooling system until engine has reached its operating temperature.
Leaks can occur on the cylinder head gasket otherwise.

3

Remove air filter housing

AR09.10-P-1150CD

4

Disconnect electrical connection (1) at differential pressure sensor (DPF) (B288)

5

Remove screw/bolt (2), loosen clamp and remove DPF differential pressure sensor (B28/8) from air filter housing bracket

The DPF differential pressure sensor (B288) remains on the catalytic converter diesel particulate filter unit.

Differential pressure sensor to bracket

*BA07.04-P-1004-01L

6

Disconnect electrical connections (3, 4), unhook engine wiring harness from bracket (5) and place to one side

7

Remove screw/bolts (6) and remove air filter housing bracket at the rear

Screw/bolt, air filter bracket to cylinder head

*BA09.10-P-1001-01K

8

Remove sealing (11) on partition wall (7)

9

Unlock and detach vacuum line (8) on partition wall (7)

MODEL 172, 204, 207, 212, 218, 221

10

Disconnect coolant hose (9) on partition wall (7)

Henn coupling

AR09.41-P-1311-01AL

Installation: Check coolant hose (9) and hose clamp for damage; replace if necessary.

11.1

Remove battery cover (10)

MODEL 172, 204, 207, 212, 218, 221

11.2

Remove covers for right air intake box and left battery device

MODEL 166

12

Unfasten electrical wiring harness (12) on partition wall (7)

MODEL 204, 207, 212, 218, 221

For model 212.098/298 there are two electrical wiring harnesses (12) present.

13

Unscrew nuts (16), loosen retaining clamps all around and detach heat shield (15) from threaded pins on partition wall (7)

14.1

Remove expansion rivets (13), detach partition wall (7) somewhat in the area of the wiper linkage, remove screw/bolt on bracket (14) and remove partition wall (7)

MODEL 172, 204, 207, 212, 218, 221

14.2

Remove partition wall (7)

MODEL 166

15

Remove cylinder head cover

AR01.20-P-5014CD

16

Remove heat shield over flexible exhaust gas recirculation pipe (17)

17

Remove screw/bolts (18, 19) and take off flexible exhaust gas recirculation pipe (17)

Installation: Replace screw/bolts (18) and seals.

Bolt, exhaust gas recirculation line to exhaust manifold

*BA14.20-P-1002-01K

Bolt, exhaust gas recirculation line to chain case cover

*BA14.20-P-1003-01K

18

Remove screw/bolts (21)

Installation: Replace seal.

Bolt, exhaust gas recirculation line to chain case cover

*BA14.20-P-1011-01K

19

Remove screw/bolts (22)

Chain case cover to cylinder head

*BA05.10-P-1002-01Q

20

Pry off cover (20)

Clean

21

Clean sealing surfaces on cylinder head, cover (20), exhaust manifold and EGR line


Do not use sharp-edged or pointed objects to clean sealing surfaces.
The sealing surfaces can get damaged otherwise.

Installation: Install new seals on EGR line, flexible exhaust gas recirculation pipe (17) and cylinder head.

22

Install in the reverse order

23

Check cooling system for leaktightness


MODEL 166

AR20.00-P-1010GQ

MODEL 172, 204, 207

AR20.00-P-1010CW

MODEL 212, 218

AR20.00-P-1010OMA

MODEL 221

AR20.00-P-1010SX

Check

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 buttoned-up and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

24

Check leaktightness of fuel system and exhaust system in the area of the cylinder head and the cover (20) for a running engine

Timing chain, chain tensioner

Number

Designation

Engine 651

BA05.10-P-1002-01Q

Chain case cover to cylinder head

Nm

9

Sensors, transmitters

Number

Designation

Engine 651

BA07.04-P-1004-01L

Differential pressure sensor to bracket

Nm

9

Air filter

Number

Designation

Engine 651

BA09.10-P-1001-01K

Screw/bolt, air filter bracket to cylinder head

Nm

9

Exhaust gas recirculation

Number

Designation

Engine 651

BA14.20-P-1002-01K

Bolt, exhaust gas recirculation line to exhaust manifold

Stage 1

Nm

12

Stage 2

°

90

Exhaust gas recirculation

Number

Designation

Engine 651

BA14.20-P-1003-01K

Bolt, exhaust gas recirculation line to chain case cover

Nm

10

Exhaust gas recirculation

Number

Designation

Engine 651

BA14.20-P-1011-01K

Bolt, exhaust gas recirculation line to chain case cover

Nm

9

Referenced documents