Dear kmaysob:

1) Make sure your engine is cold, by leaving it overnight.

2) For your 300SD, intake lash = 0.10 mm and exhaust lash = 0.35 mm.

3) You can just use 2 regular 14 mm open end wrenches to adjust your valve lashes. It may take a little longer than using the proper bent wrenches. If this is the first time you try to do any valve adjustments on these MB diesels, it should take you less than 1 hour to adjust all 10 valve lashes (5 intake + 5 exhaust) using regular wrenches.

4) You can use a 22 mm wrench or socket to rotate the power steering bolt CLOCKWISE to move the valves into positions for adjustment. You can also use a 27 mm socket to rotate the crankshaft bolt CLOCKWISE.

5) Be sure to replace the valve cover gasket after adjustment, otherwise it will leak oil soon.


Eric