TM 10-3950-672-24-2
Polish the gasket surfaces with 400 grit paper.
Use an orbital sander or sanding block to keep a flat
surface.
Inspect the valve guides for scuffing or scoring.
Measure the valve guide bore.
Maximum Diameter
8.019mm [0.3157 in]
Inspect the head surface for nicks, erosion, or any other
damage.
Check for head distortion as illustrated.
Maximum Variation (within any 50.Omm [2.0in] dia. area)
0.01 mm [0.0004 in]
Clean the valve heads with a soft wire wheel.
5-248