Yamaha F250 valve clearance -- all exhaust valves too tight?

thedillybar

Seaman
Joined
Jun 18, 2008
Messages
74
2005 F250 w/ ~2,000 hours. Unknown maintenance history.

Checked all valve clearances per the service manual. All intake valves are .178-.203 mm (within .17-.23 tolerance). All exhaust valves are .229-.279 mm (all tighter than .31-.37 mm tolerance).

Seems a bit unusual. I've pulled the shims ("adjusting pads") and they measure 2.50-2.59 mm. Anything I should check before ordering new shims and swapping them out?

13 (or 16) pads time $15 is a little rough but better than burning exhaust valves.
 
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