Oil line removal and installation - AR18.30-P-6850GQC

ENGINE 276.8 in MODEL 166, 251 

Fig 1: Identifying Oil Line Removal/Installation Components

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Open engine hood and raise to vertical position	ENGINE 276.8 in MODEL 166	AR88.40-P-1000GQ
		ENGINE 276.8 in MODEL 251	AR88.40-P-1000RT
2	Remove partition wall between wheel wells	ENGINE 276.8 in MODEL 251
			AR62.30-P-2400RT
3	Remove upper engine cover
	Perform operation step 3 to 5 for removal of the left (1L) or right (1R) oil line feed line
4	Remove left or right air filter housing		AR09.10-P-1150GQC
5	Detach left or right soundproofing over injectors
6	Detach left (1L) or right (1R) oil lines feed line from turbocharger and cylinder crankcase	Seal openings with suitable stop plug. Install new sealing rings.
		Bolt, oil feed line to turbocharger	*BA09.40-P-1004-01W
		Bolt, oil feed line to cylinder head	*BA09.40-P-1005-01W
		Record plug	Figure
	Perform operation step 6 to 10 for removal of the left (2L) or right (2R) oil line return line
7	Remove left and right engine air intake ducts		AR09.10-P-1150GQC
8	Detach charge air cooler (3) at both charge air pipes and on throttle plate actuator and place with attached coolant lines to one side and secure against falling down		AR09.41-P-6819GQC
9	Detention poly-V belt and detach at the alternator (G2) or A/C compressor (A9)	ENGINE 276.8 in MODEL 166	AR13.20-P-0001GQC
		ENGINE 276.8 in MODEL 251	AR13.20-P-0001RTZ
10.1	Detach alternator (G2), place with attached lines to one side and secure against falling down	To remove the left oil line return flow (2L)
			AR15.40-P-5032GQ
10.2	Detach A/C compressor (A9), place with attached lines to one side and secure against falling down	To remove the right oil line return flow (2R)
		Bolt, refrigerant compressor to timing case/crankcase/engine support	*BA83.55-P-1001-01M
11	Detach left (2L) or right (2R) oil lines return line from turbocharger and cylinder crankcase	Install new sealing rings. Seal openings with suitable stop plug.
		Bolt, oil return flow line to turbocharger	*BA09.40-P-1006-01W
		Bolt, oil return line to crankcase	*BA09.40-P-1007-01W
		Record plug	Figure
12	Install in the reverse order
	Check
13	Check engine oil level; correct if necessary
		ENGINE 276.8 in MODEL 166	AP18.00-P-0101GQ
		ENGINE 276.8 in MODEL 251	AP18.00-P-0101W
	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
14	Carry out an engine test run, checking the engine for proper operation and leaktightness

TURBOCHARGER

Number	Designation		ENGINE 276.8
BA09.40-P-1004-01W	Bolt, oil feed line to turbocharger	Nm	9

TURBOCHARGER

Number	Designation		ENGINE 276.8
BA09.40-P-1005-01W	Bolt, oil feed line to cylinder head	Nm	14

TURBOCHARGER

Number	Designation		ENGINE 276.8
BA09.40-P-1006-01W	Bolt, oil return flow line to turbocharger	Nm	11

TURBOCHARGER

Number	Designation		ENGINE 276.8
BA09.40-P-1007-01W	Bolt, oil return line to crankcase	Nm	9

REFRIGERANT COMPRESSOR

Number	Designation		ENGINE 276
BA83.55-P-1001-01M	Bolt, refrigerant compressor to timing case/crankcase/engine support	Nm	20

Fig 2: Identifying Record Plug (129 589 00 91 00)

Courtesy of MERCEDES-BENZ USA