Remove/install coolant pump

AR20.10-P-1271MFD

Remove/install coolant pump

06.03.2020

Engine

282 in model 118, 177, 247

Modification notes

23.10.2019

Document completely revised.

Shown on model 177 except code ME08 (hybrid drive 75-84 KW VARIANT (INCLUDING PLUGIN))

1

Belt pulley

2

Bolts

Shown on model 177 except code ME08 (hybrid drive 75-84 KW VARIANT (INCLUDING PLUGIN))

3

Screw

6

Screw

4

Screw

7

Coolant pump

5

Screw

Shown on model 177 with code ME08 (hybrid drive 75-84 KW VARIANT (INCLUDING PLUGIN))

1

Belt pulley

4

Screw

6

Screw

2

Bolts

5

Screw

7

Coolant pump

3

Screw

 Danger

Risk of death when working on component parts and systems with U >= 30 V alternating voltage (AC) or U >= 60 V direct voltage (DC)

Do not touch damaged or defective live component parts and lines or non-insulated electrical connections and lines.Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AS00.00-Z-0035-01A

 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 the vehicle manufacturer.

AS00.00-Z-0010-01A

 Warning

Risk of injury. Moving parts can pinch, crush or, in extreme cases even sever extremities.

No parts of the body or limbs should be within the operating area of mechanical components when moving components.

AS00.00-Z-0009-01A

 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

 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

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

General information on vehicles with high-voltage on-board electrical system and/or lithium-ion battery and/or gaseous-fuel drive system as well as personal protective equipment

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AH00.00-Z-0300-01A

Topical note

Notes on avoiding damage through contamination and foreign objects

AH00.00-P-5000-01A

Topical note

Notes on coolant

AH20.00-N-2080-01A

 

Remove/install

1

Remove upper engine cover.



AP01.10-P-2405-01D

 Installation: Only install upper engine cover after the leak test.

2

Slacken poly-V-belt, remove from the belt pulley (1) of the coolant pump (7), and place to one side.

Engine 282 in model 118, 177, 247
except code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR13.22-P-3902-01MFD

3

Drain off coolant.

AR20.00-P-1142MFC

 Installation: Only install lower engine compartment paneling after leak test.

4

Remove right front wheel and tire assembly.

AR40.10-P-1102MFA

5

Remove front section of the front right fender liner.

AR88.10-P-1301MFA

6

Slacken poly-V-belt and remove.

Engine 282 in model 118, 177, 247
with code ME08 (Hybrid drive 75-84 kW VARIANT (INCLUDING PLUGIN))

AR13.22-P-3902-05MFH

 Bolt, tensioner pulley to major assembly carrier

*BA13.25-P-1004-01FA

7

Counterhold belt pulley (1) of the coolant pump (7) with a suitable tool and remove screws (2).

 Screw/bolt, guide pulley to coolant pump

*BA20.10-P-1001-01DA

8

Remove belt pulley (1) from the coolant pump (7).

9

Remove screws (3, 4, 5, 6) and remove coolant pump (7) and seal.

 Collect escaping coolant using suitable vessel.

 Installation: Install new coolant pump (7) and seal.
Screw in screws (3, 4, 5, 6) in the numerical sequence.

 Bolt, coolant pump to crankcase

*BA20.10-P-1002-01DA

10

Clean sealing surface of engine.

Assembly cleaner

*BR00.45-Z-1028-04A

11

Install in the reverse order.



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

AS00.00-Z-0005-01A

12

Perform engine test run. While doing so, check engine for proper operation and leak tightness.

13

Install lower engine compartment lining.

AR61.20-P-1105MFA

14

Install upper engine cover.



AP01.10-P-2405-01D

 Belt tensioning device

Number

Designation

Engine 282

BA13.25-P-1004-01FA

Bolt, tensioner pulley to major assembly carrier

Nm

30

 Coolant pump, coolant thermostat

Number

Designation

Engine 282

BA20.10-P-1001-01DA

Screw/bolt, guide pulley to coolant pump

M6

Nm

8

 Coolant pump, coolant thermostat

Number

Designation

Engine 282

BA20.10-P-1002-01DA

Bolt, coolant pump to crankcase

Nm

25

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01