E 320 4MATIC Wagon (210.282) V6-3.2L (112.941) (1998)
Valve Guide: Service and Repair
AR05.30-P-4511AV Check/Remove/Install Valve Guides
Inspecting, Removing, Installing Valve Guides
Remove
1
Remove valves
Inspection
2
Inspect valve guide,
NOTE: Inspect valve guide if the measurements obtained are not within the stated tolerances, Replace valve guide.
Machining
3
Machine valve seat ring in cylinder head
NOTE:
-
Observe tool manufacturer's operating instructions, maintain dimensions in accordance with checking and machining dimensions.
-
If the measurements after machining are less than the specification, Replace valve seat ring.
Inspection
4
Measure seat width
NOTE: Correct valve seat width if necessary.
5
Insert valve and inspect for leaks
NOTE: Grind valve with valve grinding compound before installation.
6
Measure valve set-back to cylinder head
NOTE:
-
If measurement is less than minimum dimension no further correct valve clearance compensation is possible; replace valve seat ring or cylinder
head.
-
The valve must always be replaced after installing a new valve seat ring.
Install
7
Install valves.