Remove, install coolant return line for turbocharger

AR20.20-P-1050MFD

Remove, install coolant return line for turbocharger

21.02.2020

Engine

282 in model 118, 177, 247

Modification notes

28.10.2019

Document completely revised.

Shown on model 177 without code ME08 (hybrid drive 75 – 84 KW VARIANT (INCLUDING PLUGIN))

1

Coolant return flow line

5

Clamp

2

Plug-in connector

6

Screw

3

Line bracket

7

Screw

4

Clamp

8

O-ring

 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

 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

Information on preventing damage to electronic components due to electrostatic discharge

AH54.00-P-0001-01A

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 front power electronics bracket.

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

AR08.00-P-0005MFH

2

Drain off coolant.

AR20.00-P-1142MFC

3

Unlock and disconnect oxygen sensor electrical connection, and unclip the electrical plug-in connector (2) from the coolant return flow line (1).

 Clip remover

*452589016300

4

Remove electric lines of the lambda sensors from the line bracket (3).

5

Remove inerting system line from the line bracket (3).

Engine 282 in model 118, 177, 247
with code 2U8 (Alternative refrigerant)

6

Loosen hose clamp (4) on the coolant return flow line (1) and remove the coolant hose.

 Capture escaping coolant with absorbent rags.

 Installation: Install new clamp (4).

 Hose clamp pliers

*454589003700

7

Seal coolant return flow line (1) and coolant hose with suitable stop plugs.

 Record plug

*129589009100

8

Loosen hose clamp (5) on the coolant return flow line (1) and remove the coolant return flow line (1).

 Capture escaping coolant with absorbent rags.

 Installation: Install new clamp (5).

 Hose clamp pliers

*454589003700

9

Seal coolant return flow line (1) and thermostat housing with suitable stop plugs.

 Record plug

*129589009100

10

Remove screw (6).

 Bolt, oil line/coolant line to cylinder head/crankcase/holder

*BA09.40-P-1004-02E

11

Remove screw (7).

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

 Installation: First, screw in screw (6) and then screw in screw (7) to tightening torque and tighten to tightening angle.

 Bolt, oil line/coolant line directly to turbocharger

*BA09.40-P-1005-02E

12

Remove coolant return flow line (1).

 Installation: Install new O-ring (8).

 Assembly tool

*000589936300

13

Seal the openings in the coolant return flow line (1) on cylinder head and on the exhaust gas turbocharger with suitable stop plugs.

 Record plug

*129589009100



Clean

14

Clean the sealing surfaces on the coolant return flow line (1), the cylinder head and the exhaust gas turbocharger.

Cleaner

*BR00.45-Z-1025-04A

15

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

16

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

 Turbocharger

Number

Designation

Engine 282

BA09.40-P-1004-02E

Bolt, oil line/coolant line to cylinder head/crankcase/holder

Nm

8

 Turbocharger

Number

Designation

Engine 282

BA09.40-P-1005-02E

Bolt, oil line/coolant line directly to turbocharger

Stage 1

Nm

8

Stage 2

°

60

Repair materials

Number

Designation

Order number

BR00.45-Z-1025-04A

Cleaner

A 005 989 19 71