Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

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Valve Guide

Intake valve guide outer diameter standard 0.4340-0.4344 inch
Intake valve guide outer diameter limit 0.4418-0.4423 inch
Exhaust valve guide outer diameter standard 0.4733-0.4738 inch
Exhaust valve guide outer diameter limit 0.4812-0.4817 inch
Intake valve guide inner diameter (finished size) 0.2756-0.2763 inch
Exhaust valve guide inner diameter (finished size) 0.3150-0.3154 inch
Cylinder head intake valve guide hole diameter 0.4321-0.4329 inch standard
Cylinder head intake valve guide hole diameter limit 0.4400-0.4408 inch
Cylinder head exhaust valve guide hole diameter standard 0.4715-0.4723 inch
Cylinder head exhaust valve guide hole diameter limit 0.4793-0.4802 inch
Interference fit of valve guide (intake and exhaust) 0.0011-0.0023 inch
Intake valve stem to guide clearance standard 0.0008-0.0021 inch
Exhaust valve stem to guide clearance standard 0.0012-0.0019 inch
Valve stem to guide clearance limit (intake and exhaust) 0.0039 inch