Remove/Install Balance Shaft Housing - AR03.20-P-1105MRI

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Engine 264 in model 253

Engine 264.920 in model 205

MODIFICATION NOTES

25.04.2019	Method description adapted.	Operation step 14
25.04.2019	Base data object changed.	Operation step 15
09.05.2019	Screw/bolt, balance shaft housing to crankcase		BA03.20-P-1001-04A

Fig 1: Balance Shaft Housing Components Location - Engine 264 In Model 253 (Shown On Model 205 With Engine 264.920)

Courtesy of MERCEDES-BENZ USA

Shown on model 205 with engine 264.920

	Risk of injury to skin and eyes due to handling of engine oil. Risk of poisoning caused by swallowing engine oil	Wear protective gloves, protective clothing and safety glasses. Do not fill engine oil into beverage containers.	AS18.00-Z-0001-01A
	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A
	Notes on threaded connections fastened using a tightening angle-based tightening process		AH00.00-P-0020-01A
	Remove
1	Remove right charge air line, remove charge air cooler with connected lines, and fasten so that they are free of tension.		AR09.41-P-6817MRI
2	Rotate the engine at crankshaft center bolt in direction of engine rotation to ignition TDC on 1st cylinder.	The TDC marking of the belt pulley must be aligned with the positioning edge on the timing case cover.
3	Remove oil pan.	Engine 264 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 264.920 in model 205 with code M005 (Vehicles with 4MATIC/all-wheel drive)	AR01.45-P-7500MRJ
		Engine 264 in model 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 264.920 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive)	AR01.45-P-7500MRI
4	Remove screws (2) and remove oil suction pipe (3).
5	Unscrew screws (6) and remove the oil deflector (7).
6	Unscrew screws (4) and remove cover (5).
7	Remove screws (1a to 1d) and remove the balance shaft housing (1).	Replace screws (1a to 1d).
	Check
8	Check the O-rings of the new screws (1a, 1b) for signs of damage and that they are sitting correctly in the groove.	Do not use new screws (1a, 1b) with damaged O-rings. Engine damage can occur otherwise. If damage is present, ↓ Replace new screws (1a, 1b).
9	Check the coating of the balance shaft housing (1) for damage.	If damage is present, ↓ replace the balance shaft housing (1).
	Install
10	Position the balance shaft housing (1) in the assembly position on the crankcase and tighten the new screws (1c, 1d) slightly by hand.	Do not damage the coating on the balance shaft housing (1). Engine damage can occur otherwise.
11	Tighten new screws (1a, 1b) slightly by hand.	Do not push the O-rings of the new screws (1a, 1b) out of the groove or damage them. Engine damage can occur otherwise.
12	Tighten the new screws (1a to 1d) in the specified tightening sequence.	Tightening sequence: 1st screw (1d), 2nd screw (1b), 3rd screw (1c) and 4th screw (1a). Observe tightening sequence at each tightening stage. Screw/bolt, balance shaft housing to crankcase	*BA03.20-P-1001-04A
13	Install cover (5) and tighten screws (4).	Screw, cover to balance shaft housing	*BA03.20-P-1003-04A
14	Position the oil deflector (7) and tighten the screws (6).	Screw/bolt, oil deflector to crankcase	*BA18.10-P-1005-01W
15	Install the oil suction pipe (3) and tighten the screws (2).
	Specified engine oils (service) - Overview	Observe alignment of the oil suction pipe (3). Wet sealing ring of the oil suction pipe (3) with engine oil.	BB00.40-P-0223-02A
		Bolt, oil suction pipe to pipe flange/bracket If the sealing ring on the oil suction pipe (3) is damaged, ↓ Replace oil suction pipe (3).	*BA18.10-P-1003-01W
16	Install oil pan.	Engine 264 in model 253 with code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 264.920 in model 205 with code M005 (Vehicles with 4MATIC/all-wheel drive)	AR01.45-P-7500MRJ
		Engine 264 in model 253 except code M005 (Vehicles with 4MATIC/all-wheel drive) Engine 264.920 in model 205 except code M005 (Vehicles with 4MATIC/all-wheel drive)	AR01.45-P-7500MRI
17	Attach charge air cooler and install right charge air line.		AR09.41-P-6817MRI

BALANCE SHAFT HOUSING

Number	Designation			Engine 264
BA03.20-P-1001-04A	Screw/bolt, balance shaft housing to crankcase	Stage 1	Nm	5
		Stage 2	Nm	27
		Stage 3	∠°	90
		Stage 4	∠°	90

BALANCE SHAFT HOUSING

Number	Designation			Engine 264
BA03.20-P-1003-04A	Screw, cover to balance shaft housing	M6	Nm	8

OIL PUMP

Number	Designation		Engine 264
BA18.10-P-1003-01W	Bolt, oil suction pipe to pipe flange/bracket	Nm	9

OIL PUMP

Number	Designation		Engine 264
BA18.10-P-1005-01W	Screw/bolt, oil deflector to crankcase	Nm	9