Check basic position of balancing shaft - AR03.20-P-3637CD

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ENGINES 651 in MODELS 166, 172, 204, 207, 212, 218, 221

Shown on engine 651.911

Fig 1: Balancing Shaft Basic Position - Shown On Engine 651.911

Courtesy of MERCEDES-BENZ USA

Shown on engine 651.912

Fig 2: Balancing Shaft Basic Position - Shown On Engine 651.912 (1 Of 2)

Courtesy of MERCEDES-BENZ USA

Fig 3: Balancing Shaft Basic Position - Shown On Engine 651.912 (2 Of 2)

Courtesy of MERCEDES-BENZ USA

	Removing
1	Secure vehicle on vehicle lift	Model 166	AR00.60-P-0100GZ
		Model 172	AR00.60-P-0100T
		Model 204, 207	AR00.60-P-0100CW
		Model 212, 218	AR00.60-P-0100EWS
		Model 221.0/1	AR00.60-P-0100SX
2.1	Remove underfloor paneling	MODEL 166.0	AR61.30-P-1001GQ
2.2	Remove bottom sections of soundproofing	Model 172.4	AR94.30-P-5300W
2.2	Remove bottom sections of soundproofing	Model 204. except 204.9, 207, 212, 218	AR94.30-P-5300EW
2.3	Detach lower engine compartment paneling	Model 204.9	AR61.20-P-1105CY
2.3	Detach lower engine compartment paneling	Model 221 except CODE (Z07) Top protection	AR61.20-P-1105SX
3.1	Remove oil pan bottom section	Model 172, 204 (except 204.9), 212 except 4MATIC Model 207, 218 Model 204 (except 204.9), 212 with 4MATIC	AR01.45-P-7555CD
3.1	Remove oil pan bottom section	Model 221	AR01.45-P-7555SYZ
3.2	Remove oil pan	MODEL 166.0	AR01.45-P-7500GQA
		Model 204.9 with 4MATIC	AR01.45-P-7500OMD
		Model 204.9 except 4MATIC	AR01.45-P-7500OND
4	Remove oil suction pipe (8) bolts (7) and the oil spray protection (8a)
5	Detach oil suction pipe (8) and Oil spray protection (8a) downwards
	Checking
6.1	Set piston on cylinder 1 with counterholder to top dead center (ignition TDC)	Except code (B03) ECO start-stop function Rotate engine at crankshaft in direction of rotation of the engine until scribe mark for a 0° crank angle on pulley/vibration damper corresponds with scribe mark on cylinder crankcase.
6.1		Counterholder	Figure
6.2	Set piston on cylinder 1 using a suitable tool to top dead center (ignition TDC)	For vehicles with crankshaft-belt pulley with freewheel. Rotate engine at crankshaft in direction of rotation of the engine until scribe mark for a 0° crank angle on pulley/vibration damper corresponds with scribe mark on cylinder crankcase.
7	Check basic position of the Lanchester balance shafts (1)	The marking on Lanchester housing (A) and marking on the Lanchester balance shaft (B) must be aligned with each other. Bring Lanchester balance shafts (1) into the basic position if this is not the case. See: ↓
7	Check basic position of the Lanchester balance shafts (1)	Set basic position of the balance shaft	AR03.20-P-3638CD
	Install
8	Install oil suction pipe (8) and oil spray protection (8a)	Replace O-ring (9) for oil suction pipe (8). Fully introduce oil suction pipe (8) into the oil pump (10).
9	Screw in oil suction pipe (8) bolts (7) and the oil spray protection (8a)		*BA18.10-P-1002-01O
10.1	Install oil pan bottom section	Model 172, 204 (except 204.9), 212 except 4MATIC Model 207, 218 Model 204 (except 204.9), 212 with 4MATIC	AR01.45-P-7555CD
10.1	Install oil pan bottom section	Model 221	AR01.45-P-7555SYZ
10.2	Install oil pan	MODEL 166.0	AR01.45-P-7500GQA
		Model 204.9 with 4MATIC	AR01.45-P-7500OMD
		Model 204.9 except 4MATIC	AR01.45-P-7500OND
11.1	Attach underfloor paneling	MODEL 166.0	AR61.30-P-1001GQ
11.2	Attach bottom sections of soundproofing	Model 172.4	AR94.30-P-5300W
11.2	Attach bottom sections of soundproofing	Model except 204.9, 204, 207, 212, 218	AR94.30-P-5300EW
11.3	Install lower engine compartment paneling.	Model 204.9	AR61.20-P-1105CY
11.3	Install lower engine compartment paneling.	Model 221 except CODE (Z07) Top protection	AR61.20-P-1105SX
12	Secure vehicle on vehicle lift	Model 166	AR00.60-P-0100GZ
		Model 172	AR00.60-P-0100T
		Model 204, 207	AR00.60-P-0100CW
		Model 212, 218	AR00.60-P-0100EWS
		Model 221.0/1	AR00.60-P-0100SX
	Risk of accident caused by vehicle starting off by itself when engine is running. Risk of injury caused by contusions and burns during starting procedure or when working near the engine as it is running	Secure vehicle to prevent it from moving by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
13	Check for oil leaks with engine running		AS00.00-Z-0005-01A

OIL PUMP

Number	Designation				Engine 651
BA18.10-P-1002-01O	Screw/bolt, oil suction pipe to bearing housing	M6	Stage 1	Nm	6
		M6	Stage 2	∠°	90
		M8	-	Nm	34

Fig 4: Identifying Counterholder (651 589 00 40 00)

Courtesy of MERCEDES-BENZ USA