Check basic position of camshafts - AR05.20-P-6010SX

ENGINE 273 in MODEL 216 Basic position of camshaft for installed front cover on cylinder head at a 55° crank angle BTDC

ENGINE 272, 273 in MODEL 221 Basic position of camshaft for installed front cover on cylinder head at a 55° crank angle BTDC

Fig 1: Checking Basic Position Of Camshafts

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove front engine cover	See Remove air filter housing.	AR09.10-P-1150SX
2	Remove Hall sensor on camshafts		AR15.10-P-2000SX
	Checking
3	Turn engine at crankshaft in direction of rotation of engine (arrow) to a 55°Crank before ignition TDC (305° marking on belt pulley) and check basic position of camshafts	The 305° marking (1) on belt pulley must be aligned with positioning edge (2) on timing case cover and markings (3) on pulse wheels must be located in center of sensor bores for Hall sensors. If necessary: ↓
3		Set basic position of camshafts.	AR05.20-P-6020SX
4	Install in the reverse order
	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
5	Carry out an engine test run and check engine for leaks