Section 2 - Cylinder Head - Group 02 Cylinder Head Valve Guide - Replacement (2-03) M11 Page 2-21 Measure the outside diameter of the base of the valve guide. Valve Guide O.D. of Base mm in 16.513 MIN 0.6501 16.526 MAX 0.6506 Measure the outside diameter of the seal area of the valve guide. Valve Guide O.D. of Seal Area mm in 14.25 MIN 0.561 14.37 MAX 0.566 Assembly Use valve guide driver (1), Part No. 3823947, to install the new valve guides. Measure the valve guide installed height above the cyl- inder head top deck surface. Valve Guide Height (Installed) mm in 27.15 MIN 1.069 27.65 MAX 1.089