Valve Guides Lexus LX J80

1. Ensure valve guide inside diameter is within specification. See «CYLINDER HEAD»(ref-49416-S37879640662001011500000) table under ENGINE SPECIFICATIONS. Replace valve guide if inside diameter exceeds specification.
2. To replace valve guide, heat cylinder head to 176-212°F (80-100°C). Using hammer and Valve Guide Remover/Installer (SST 09201-01070), drive valve guide out from cylinder block side of cylinder head.
3. Measure cylinder head valve guide bore inside diameter. If bore inside diameter is.4524-.4533" (11.492-11.513 mm), use standard valve guide. If bore inside diameter is.4544-.4552" (11.542-11.563 mm), use oversize valve guide.
4. If bore inside diameter exceeds.4533" (11.513 mm), machine valve guide bore to.4544-.4552" (11.542-11.563 mm) for oversize valve guide. If bore I.D. exceeds.4552" (11.563 mm), replace cylinder head.
5. To install valve guide, heat cylinder head to 176-212°F (80-100°C). Use hammer and valve guide remover/installer to install valve guide. Install valve guide until valve guide installed height is within specification. See «CYLINDER HEAD»(ref-49416-S37879640662001011500000) table under ENGINE SPECIFICATIONS. Valve guide installed height is measured from top of valve guide to cylinder head surface. see scheme 38
6. Using.275" (7.00 mm) reamer, ream valve guide to obtain specified valve stem-to-guide oil clearance. See «CYLINDER HEAD»(ref-49416-S37879640662001011500000) table under ENGINE SPECIFICATIONS.

Scheme 36