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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Radiator Cap: Service and Repair






INSPECTION





1. Inspect the radiator cap for damage, crack and weakening.
2. Connect the radiator cap tester to the radiator cap.





3. Apply the pressure to the tester till the needle is fixed.
4. If the needle stays at the same position for 10 seconds, the radiator cap is in good condition.