Inspect cylinders with a light probe - AR01.00-P-0200MCU

ENGINE 132.910 in MODEL 451.3/4 

Fig 1: Identifying Expansion Rivet, Cover, Center Bolt And Crankshaft Belt Pulley

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Spark Plugs

Courtesy of MERCEDES-BENZ USA

	Remove/install
	Risk of death  caused by vehicle slipping or toppling off of the lifting platform.	Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.	AS00.00-Z-0010-01A
1	Lift vehicle using the vehicle lift until the rear wheels can be turned freely
2	Remove expansion rivet (1) and cover (2)
3	Remove spark plugs (R4)
			AP15.10-P-1580MCC
4	Lead a suitable hose through the spark plug threaded hole in the respective cylinder and turn engine at the center bolt (3) of the crankshaft belt pulley (4) in the direction of engine rotation until the piston stands at the bottom dead center of the cylinder to be checked	The hose must lie on the piston. In this way one can establish whether the BDC is reached.
	Check
5	Check cylinder barrel, piston crown and valves with endoscope
	Notes for evaluation of a cylinder barrel		AH01.40-P-0001-03SM
	000 588 01 21 00 Endoscope		WS01.00-P-0097B
		In the case of visible cylinder wear the cylinder barrel is roughened and the honing marks are no longer visible. The cylinder head must be removed in cases of doubt. ↓Remove/install cylinder head	AR01.30-P-5800MCU
6	Check other cylinders in the same way
7	Install in the reverse order