Replacing oil non-return valve of chain tensioner - RA18001044150X(18-4150)

WARNING: This page does not describe the selected car, but rather 42 other vehicles, including the 1999 Mercedes-Benz S600, 1999 Mercedes-Benz S500, 1999 Mercedes-Benz S420, 1999 Mercedes-Benz S320, and 1999 Mercedes-Benz CL600. However, it is still accessible from the selected car via links, so may be relevant.

Preceding work:

Timing case cover removed (01-2100)

Tensioning rail removed (05-3300)

Operation no. of operation texts and work units or standard texts and flat rates:

Fig 1: Replacing Oil Non-Return Valve Of Chain Tensioner

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Oil non-return valve (8)	pull off with suitable pliers.
New oil non-return valve (8)	install by hand. Function The oil non-return valve (8) prevents the oil reservoir for the chain tensioner in the timing case cover running dry when the engine is not operating.