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#24: 06-05-2010, 02:08 PM
 
 JER5EY
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Car: '06 GT 5-spd w/ a few small mods
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Quote:
Originally Posted by GTTuner View Post
From the heads I have taken apart the exhaust valve's and seats seem to take quite a beating. One motor, with 115,000K needed the seats cut and the valves ground to restore the margin, and my 83,000 mile motor needed quite a bit of lapping to get the seats cleaned up.
I'm also told that three (3) one degree cuts on the valve seat surfaces is desirable, to help avoid "hot spots".... Makes sense to me...