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)

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Compression Check

NOTE: Measure compression with the engine hot and at wide open throttle

- Normal value B5234T and B5254T: 1.1-1.3 MPa (156-185 psi)
- Maximum deviation between cylinders: 0.2 MPa (28.4 psi)

NOTE: This applies when the engine is warm and the throttle fully open and the engine being turned by the starter motor at 4.2-5.0 rps (250-300 rpm).