Replace front crankshaft radial sealing ring - AR03.20-P-3000MLJ

ENGINES 157, 278 in MODEL 166 

Fig 1: Replacing Front Crankshaft Radial Sealing Ring

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove belt pulley/vibration damper (8)		AR03.30-P-1600GQ
2	Press out crankshaft radial sealing ring (5) from the mounting bore using a screwdriver	Do not damage crankshaft (1a) and mounting hole. Use a clean rag as a base when pushing out. Leakage can occur otherwise. Install front crankshaft radial sealing ring (5).	AR03.20-P-3000-01MM
			Fig 2
	Checking
3	Check contact surface of crankshaft radial sealing ring (5) at hub of belt pulley/vibration damper (8)	Replace belt pulley/vibration damper (8) if there are score marks and galling.
4	Install in the reverse order
5	Check engine oil level; correct if necessary		AP18.00-P-0101GQ
	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
6	Carry out an engine test run and check engine for leaks

Fig 2: Identifying Sleeve (119 589 01 14 00)

Courtesy of MERCEDES-BENZ USA