Valve Guide Servicing

With cylinder head removed, clean bores of valve guides. Inspect valve guides for wear. Inner diameter of inlet and exhaust guides should be 0.354 - 0.355" (9.000-9.015 mm). If guide is worn, replace with new guide.
With mandrel, drive or press worn guide from combustion chamber side of cylinder head. Inspect valve guide bore in cylinder head and ream to accept next oversize guide.
Press fit of standard valve guide in cylinder head is 0.0003 - 0.0008" (0.008 - 0.020 mm). Press fit of oversize valve guide is 0.0004 - 0.0009" (0.011 - 0.024 mm).
Heat cylinder head to approximately 174°F (80°C) and cool valve guide. Coat guide bore with oil and using mandrel, seat new guide in bore.
NOTE: Be sure snap ring is properly installed. Recheck valve guide clearance and that valve moves freely in guide.