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 Spring: Testing and Inspection

1. Measure the valve spring tension. Specifications for the valve spring tension are as follows:
^ Valve Closed: 205 N (46 lbs.) @ 30.3 mm (1.19 inch)
^ Valve Open: 409 N (91 lbs.) @ 21.7 mm (0.854 inch)
2. If low valve spring load is found, replace the valve springs. DO NOT use shims to increase spring load. The use of shims will cause the valve spring to bottom out before the camshaft lobe is at peak lift.