Remove/install chain tensioner - AR05.10-P-7800SXI

ENGINE 642 in MODEL 207, 212, 218, 221, 222

Shown on engine 642.9

Fig 1: Identifying Chain Tensioner Remove/Install Components - Shown On Engine 642.9

G09974296

Courtesy of MERCEDES-BENZ USA

	Remove/install
1	Remove engine cover	ENGINE 642 in MODEL 207, 212, 218, 221, 222
		ENGINE 642 in MODEL 221 Ensure correct seating of the engine cover.	AR01.10-P-2405SXI
2	Remove right air filter housing		AR09.10-P-1150SXI
3	Remove chain tensioner (1)	Replace sealing ring.
		Chain tensioner in cylinder head	*BA05.10-P-1001-01L
4	Install in the reverse order
	Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.	Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.	AS00.00-Z-0005-01A
5	Check for oil leaks with engine running

TIMING CHAIN, CHAIN TENSIONER

Number	Designation		ENGINE 642
BA05.10-P-1001-01L	Chain tensioner in cylinder head	Nm	80