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 logical successor to CHARM, I recommend you try it!

Link: lemon-manuals.la

Compression Check: Specifications


Compression Pressure:
Standard value 1,200 kPa (170 psi)
Limit 1,050 kPa (149 psi)


Pressure Differential between cylinders (Max) 100 kPa (14 psi)