How can one tell if a valve job has been done to the valves?

Highbredcloud

Active Member
Mar 4, 2003
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Palos Hills, IL
:shrug: How can you tell? I'm gonna take the valves out but what should I look for? anyone have pix or an explanation? Also how can you tell between 3 angle and 5 angle? Is the area in red the seat area where I should be looking to find if I have a valve job?
 

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