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)

Or, hide this message: temporarily or permanently

Valve, Intake/Exhaust

Valve Timing
Intake-Open 19°BTDC
Intake-Close 45°ABDC
Exhaust-Open 49°BBDC
Exhaust-Close 15° ATDC
Compression Pressure 178 psi @ 250 rpm
Maximum Variation Between Cylinders 97kPa (14 psi)
Service Limit 25%
Valve Clearence-Hot Engine Hydraulic Lash Adjuster

Valves-Thickness of Valve Head
Intake 1.0 mm (0.039 inch)
Service Limit 0.5 mm (0.019 inch)
Exhaust 1.2 mm (0.047 inch)
Service Limit 0.7 mm (0.028 inch)

Valve Stem to Guide Clearance
Intake 0.02 - 0.05 mm (0.0008 - 0.002 inch)
Service Limit 0.10 mm (0.004 inch)
Exhaust 0.04 - 0.07 mm (0.0016 - 0.0028 inch)
Service Limit 0.15 mm (0.006 inch)
Valve Face Angle 45° to 45.5°
Valve Stem Diameter Intake/Exhaust 6.0 mm (0.236 inch)