Installing chain tensioner - AR05.10-P-7800-02VA

MODIFICATION NOTES

8.2.05

Chain tensioner housing in timing case cover

Engine 272

TIMING CHAIN, CHAIN TENSIONER

Number	Designation		Engine 272
BA05.10-P-1001-01B	End piece of chain tensioner	Nm	50
BA05.10-P-1002-01B	Chain tensioner housing in timing case cover	Nm	70

TIMING CHAIN, CHAIN TENSIONER

Number	Designation		Engines 275, 285
BA05.10-P-1002-01H	End piece of chain tensioner	Nm	80
BA05.10-P-1003-01H	Chain tensioner housing in timing case cover	Nm	120

Press out the bolt (8) and detent spring (9) from chain tensioner housing (5) (arrowed).

Fig 1: Pressing Out Bolt And Detent Spring From Chain Tensioner Housing
Courtesy of MERCEDES-BENZ USA
Insert the bolt (8) and detent spring (9) in chain tensioner housing (5) (arrowed).
Insert the bolt (8) and detent spring (9) so that the detent springs (9) sit in the first notch (10).

The bolt (8) must remain in this position.

Fig 2: Identifying Positioning Of Bolt And Detent Spring
Courtesy of MERCEDES-BENZ USA
Screw in the chain tensioner housing (5) with bolt (8), detent spring (9) and new sealing ring (7) into the timing case cover, and tighten .

Fig 3: Identifying Chain Tensioner Housing, Sealing Ring With Bolt
Courtesy of MERCEDES-BENZ USA
Insert the push spring (3) and filler pin (4) in chain tensioner housing (5).
Screw in the end piece (1) with new sealing ring (2) into chain tensioner housing (5), and tighten .
When the push spring (3), filler pin (4) and end piece (1) are installed, bolt (8) is moved into the correct position in chain tensioner housing (5).

Fig 4: Identifying Spring, Filler Pin And End Piece
Courtesy of MERCEDES-BENZ USA