Replace timing chain - AR05.10-P-7601CD

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

Fig 1: Timing Chain

Courtesy of MERCEDES-BENZ USA

MODIFICATION NOTES

11.5.11

Information for installation position of the timing chain, added

Operation step 5

	Removing
1	Remove cylinder head cover trim
2	Remove cylinder head cover		AR01.20-P-5014CD
3	Remove chain tensioner		AR05.10-P-7800CD
4	Disconnect timing chain (1)	Before separating old timing chain (1), check both camshaft sprockets for grooves and pitting, if necessary, remove camshafts and replace defective camshaft sprocket. See: ↓	AR05.10-P-7601-01CD
		Remove/install camshafts Cover over timing case recess with a clean cloth.	AR05.20-P-6992CD
		Case	Figure
		Chain separating tool	Figure
		Thrust spindle	Figure
		Pressure pins	Figure
	Install
5.1	Draw in timing chain (1)	With code (B03) ECO start/stop function Always remove the assembly connecting link, the assembly outer plate and the assembly locking element after pulling in the new timing chain (1). Damage can occur on the engine otherwise. The engine must not be turned back. The timing chain can skip otherwise and can cause engine damage. Turn engine using a suitable tool.	AR05.10-P-7601-04CD
		Case	Figure
		Assembly inserts	Figure
5.2	Draw in timing chain (1)	Except code (B03) ECO start-stop function It is essential to remove assembly connecting link, assembly outer plate and assembly locking element after pulling in the new timing chain (1) in order to avoid damage to the engine. Crank engine in direction of rotation. The bores (arrow) of the new timing chain (1) must point outwards. Turn engine using a counterholder.	AR05.10-P-7601-04CD
		Case	Figure
		Counterholder	Figure
		Assembly inserts	Figure
6	Rivet timing chain (1)	Cover over timing case recess with a clean cloth.	AR05.10-P-7601-02CD
			*BA05.10-P-1004-01Q
		Case	Figure
		Riveting tool	Figure
		Assembly inserts	Figure
7	Install chain tensioner		AR05.10-P-7800CD
	Checking
8	Check basic setting for camshafts.	Set up basic position for camshafts as required. See: ↓ Set basic position of camshafts	AR05.20-P-6010CD
8	Check basic setting for camshafts.		AR05.20-P-6020CD
9	Install cylinder head cover		AR01.20-P-5014CD
10	Install trim panel of cylinder head cover