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 Clearance


Firing Order 1-3-4-2
Idle Speed 900-950 RPM [1] 900-1000 RPM [2]
Timing 10° BTDC
Fuel Mixture 0.75%±0.25% @ 900-950 RPM [3]
Fuel Mixture 7.0±0.5 volts @ 900-950 RPM [4]
Valve Adjustment (Intake .004 in.) (Exhaust .010 in.) [5]

[1] Manual Transmission
[2] Automatic Transmission
[3] Sample taken before the catalytic converter, the oxygen sensor disconnected, and the 30° C Thermocontact wires bridged.
[4] At test terminal 22, and oxygen sensor connected
[5] With engine cold, minimum cooling time of 6 hours