Removing and installing guide rail in cylinder head - RA05001043400X(05-3400)

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:

Cylinder head cover removed (01-0500) .

Fig 1: Identifying Guide Rail In Cylinder Head Remove/Install Components

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Chain tensioner (1)	remove (05-3100) .
Exhaust camshaft	rotate with wrench (25) 119 589 00 01 00 (WAF 27) or 104 589 01 01 00 (WAF 29) in direction of rotation of camshaft, slacken timing chain at guide rail (42). If the curved guide rail (42) is taken out of its mounting, the thrust pin in the chain tensioner is moved in the pressure direction by one detent. The chain tensioner must then be removed to avoid the timing chain being over-tensioned.
Guide rail (42) at bearing pin	pull off, fit on.
Exhaust camshaft	turn back with wrench (25) in opposite direction of rotation of camshaft.
Chain tensioner (1)	install (05-3100) .

Guide rail with three bearing points replaces guide rail with two bearing points.

Standardization with engines 104.942/992.

1st version
2nd version

Fig 2: Identifying Guide Rail With Bearing Points
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

PRODUCTION BREAKPOINT - JUNE 1991

Model	Engine	Engine end no. manual transmission	Engine end no. automatic transmission
124.031	104.980	006321	028147
124.051
124.091
129.061	104.981	001311	011953
140.032/033	104.990	000096	005054

Special tools

Fig 3: Identifying Special Tool (119 589 00 01 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 4: Identifying Special Tool (104 589 01 01 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.