ar2010p2460cd

Remove/install coolant thermostat

Type ar · topic 20.10 · version 0107 · 2012-12-19

Applies to: ENGINE 651 in MODEL 166, 172, 204, 207, 212 (except 212.098/298), 218, 221

Where it sits

Function group 1 Engine › 20 Engine cooling system › 20.10 Coolant pump, coolant thermostat — Series 166 · Series 172 · Series 204 · Series 207 · Series 212 (models 001, 002, 003, 004, 005, 006, 011, 020, 021, 023, 024, 025, 026, 027, 034, 035, 036, 040, 041, 047, 048, 052, 053, 054, 055, 056, 057, 059, 061, 065, 067, 072, 073, 074, 075, 076, 077, 080, 082, 087, 088, 089, 090, 091, 092, 093, 094, 095, 097, 099, 133, 134, 136, 147, 148, 154, 162, 165, 167, 168, 195, 201, 202, 203, 204, 205, 206, 211, 220, 221, 223, 224, 225, 226, 227, 234, 236, 247, 248, 254, 255, 256, 257, 259, 261, 265, 267, 272, 273, 274, 275, 276, 277, 280, 282, 287, 288, 289, 291, 292, 293, 294, 297, 299) · Series 218 · Series 221 · Series 651

EinPAS 15 Engine › 15.25 Engine cooling system › 15.25.30 Pump/thermostat/preheater — Series 166 · Series 172 · Series 204 · Series 207 · Series 212 (models 001, 002, 003, 004, 005, 006, 011, 020, 021, 023, 024, 025, 026, 027, 034, 035, 036, 040, 041, 047, 048, 052, 053, 054, 055, 056, 057, 059, 061, 065, 067, 072, 073, 074, 075, 076, 077, 080, 082, 087, 088, 089, 090, 091, 092, 093, 094, 095, 097, 099, 133, 134, 136, 147, 148, 154, 162, 165, 167, 168, 195, 201, 202, 203, 204, 205, 206, 211, 220, 221, 223, 224, 225, 226, 227, 234, 236, 247, 248, 254, 255, 256, 257, 259, 261, 265, 267, 272, 273, 274, 275, 276, 277, 280, 282, 287, 288, 289, 291, 292, 293, 294, 297, 299) · Series 218 · Series 221 · Series 651

AR20.10-P-2460CD

Remove/install coolant thermostat

18.12.12

ENGINE

651 in MODEL 166, 172, 204, 207, 212 (except 212.098/298), 218, 221

Remove/install coolant thermostat

P20.10-2248-07

Shown on model 204

1

Electrical connection

4

Screw/bolts

7

Water hoses

2

Electrical connection

5

Screw/bolt

B11/4

Coolant temperature sensor

3

Hoses

6

Thermostat housing

R48

Coolant thermostat heating element

Danger !

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

Danger !

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by vehicle manufacturer.

AS00.00-Z-0010-01A

Remove/install

1

Drain coolant at radiator

ENGINE 651 in MODEL 166

AR20.00-P-1142GQ

ENGINE 651 in MODEL 172
ENGINE 651 in MODEL 204
ENGINE 651 in MODEL 207

AR20.00-P-1142CW

ENGINE 651 in 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.

2

Remove cylinder head cover trim

3

Remove intake hose upstream of air filter housing

4

Remove cover for belt drive

Detach cover for upper belt drive to the front and remove upwards

5

Unplug electrical connection (1) at coolant thermostat heating element (R48)

The coolant thermostat heating element (R48) must not be removed from the thermostat housing (6).

6

Detach electrical connection (2) at coolant temperature sensor (B11/4)

7

Disconnect hoses (3) from thermostat housing (6)

AR09.41-P-1311-01AL

Installation:
Check sealing rings and catch springs for damage, thoroughly clean connection but do not grease and ensure exact seating of the catch springs:
Leaks can occur on the engine as a result otherwise.

Installation: Check hose clamps for damage; replace if necessary.

8

Disconnect water hoses (7) from thermostat housing (6)

Installation: Check hose clamps for damage; replace if necessary.

9

Remove screw/bolts (4, 5) and remove thermostat housing (6)

Bolt, thermostat to cylinder head/coolant pump

*BA20.10-P-1001-01X

10

Install in the reverse order

11

Check cooling system for leaktightness

ENGINE 651 in MODEL 166

AR20.00-P-1010GQ

ENGINE 651 in MODEL 172
ENGINE 651 in MODEL 204
ENGINE 651 in MODEL 207

AR20.00-P-1010CW

ENGINE 651 in MODEL 212 (except 212.098/298), 218

AR20.00-P-1010OMA

ENGINE 651 in MODEL 221

AR20.00-P-1010SX

Coolant pump, coolant thermostat

Number

Designation

ENGINE 651

BA20.10-P-1001-01X

Bolt, thermostat to cylinder head/coolant pump

M6

Nm

9

Referenced documents