Operation CHARM
: Car repair manuals for everyone.
Home
>>
Subaru
>>
2007
>>
Impreza WRX F4-2.5L DOHC Turbo
>>
Repair and Diagnosis
>>
Engine, Cooling and Exhaust
>>
Engine
>>
Compression Check
>>
Specifications
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: Specifications
Compression
Compression pressure (at 200 - 300 rpm):
Standard
981 - 1,177 kPa (10 - 12 kgf/cm2, 142 - 171 psi)
Limit
882 kPa (9.0 kgf/cm2, 128 psi)
Difference between cy1inders
49 kPa (0.5 kgf/cm2, 7 psi), or less