Remove/install glow plugs · ar1520d4111b · Mercedes-Benz WIS

AR15.20-D-4111B

Remove/install glow plugs

6.4.99

ENGINE 611.981 /987 in MODEL 901.6, 902.6, 903.6, 904.6

ENGINE 612.981 in MODEL 902.6, 903.6, 904.6, 905.6

ENGINE 611.983 in MODEL 690.6

D15.20-1101-06

Shown on engine 611

1 Glow plug

2 Connector

3  Wrench socket

 	Remove/Install
 Danger!	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns when working in engine during starting procedure	Secure vehicle to prevent it from moving. Wear closed and snug-fitting work clothes. Do not grasp hot or rotating parts.	AS00.00-Z-0005-01A
1	Remove top part of charge air distribution pipe	 Only on Engine 611.981/983/987	AR09.41-D-1312A
2	Use pliers to unplug connector (2) at the glow plugs (1)		*611589003700
3	Use wrench socket (3) to unscrew glow plugs (1) from the cylinder head	  If the release torque is greater than 25 Nm, warm up engine to operating temperature.	*001589780900
			*BA15.20-P-1001-01A
4	Ignition off
5	Unplug connectors (2) at glow plugs	 Pliers	*611589003700
 Danger!	Risk of injury to skin and eyes caused by handling hot or glowing objects.	Wear safety gloves, protective clothing and safety glasses, if necessary.	AS00.00-Z-0002-01A
6	Unscrew glow plugs
		 Pay attention to part no. on glow plug.	*BA15.20-P-1001-01A
		 Wrench socket	*001589780900
		 Engine 611.980 engine If cylinder head removed:
		 Heat cylinder head to approx. 90 °C	*WH58.30-Z-1001-28A
		 Heat cylinder head to approx. 90 °C	*WH58.30-Z-1003-28A
	Cleaning
7	Clean glow plug bay	 Cylinder brushes, Perlon  10mm	*WH58.30-Z-1003-03A
		 Cylinder brushes, perlon  6mm	*WH58.30-Z-1002-03A
8	Install in the reverse order

 Preglow system

Number	Designation		Engine 611.960/961/980/981/987, 612.961/963/981/983, Engine 611.980/981/983/987, 612.981 with part no. A 001 159 49 01, Engine 611.962/963/965/966/967, 613.960/961	Engine 611.980/981/987 with part no. A 001 159 48 01 Engine 611.980/981/987, 612.981 with part no. A 001 159 49 01


BA15.20-P-1001-01A	Glow plug to cylinder head	Nm	20	20

611 589 00 37 00

Pliers

Wrench socket

001 589 78 09 00

Commercially available tools

Number	Designation
WH58.30-Z-1002-03A	Cylinder brush, Perlon, 6 mm dia.
WH58.30-Z-1003-03A	Cylindrical brush, Perlon, 10 mm dia.
WH58.30-Z-1001-28A	Recirculated air warming cabinet
WH58.30-Z-1003-28A	Heating oven

ar0941d1312a Remove/install top section of charge air distribution pipe
as0000z000201a Risk of injury. Skin or eye injuries may result when handling hot or glowing objects.
as0000z000501a 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.