In Reply to: Valve Adjustment posted by Josh on November 05, 1999 at 01:18:53:
If you have a M20 engine, you should adjust the valves...
Checking the valves is very easy (only put off valve-cover).
If there is a too small gap the valve doesn't close and will burn out => new head!
If there is a too big gap the valve closes too fast and damage the head => new head!
Check your manual...
'90 524td w/ just adjusted valves :-)