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

Compression Check




Compression Pressure
Engine coolant temperature 80 - 95°C (176 - 203°F)
Engine speed 200 r/min
Standard 1,440 kPa (209 psi)
Minimum limit 1,000 kPa (145 psi)
Maximum difference between cylinders 98 kPa (14 psi)