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

Prior to taking a compression reading, verify the cranking speed is greater than 300 RPM.

All 4 cylinders must be tested to obtain valid test results. Record the readings.

The maximum pressure differential should not exceed 100 kPa (14.5 psi).
The nominal cylinder compression value is:
Natural aspirated engines 1300 kPa - 1500 kPa (188.5 psi - 217.6 psi).