TM 5-3825-229-14&P
6-4. CYLINDER HEAD AND VALVES (cont)
b. Installation
(1) Press valve guides (8) in position from top of cylinder head with valve guide installation tool and hydraulic
press. Install replacement valve guides with grooved end up.
NOTE
The exhaust valve guide is 0.2362 in. (6 mm) longer than the intake valve guide. Guides must be installed
in the correct guide bore.
The bore of a replacement valve guide is 0.3004-0.3047 in. (7.63-7.74 mm). The interference fit of a guide
in cylinder head is 0.0009-0.0026 in. (0.025-0.065 mm). The valve guide bore will close some when
installed. Use a valve guide reamer to resize valve guides after installation to the correct inside diameter.
Do not ream or hone guides already installed in service replacement cylinder heads. Valve seats must be
refinished after installing new valve guides.
(2) Lubricate stem of each valve (5) with engine oil (OE/HDO) and insert in guide (8) from which it was removed.
(3) Install valve spring wear plate (7) over valve guides in recess of the head.
6-6
