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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Timing Belt: Testing and Inspection

VISUAL CHECK




The belt must be replaced if cracks are found in the side and rear faces.




Also replacement is necessary when abnormal wear is found in the side face.




Replacement is necessary when fabric is found to be cracked or disintegrated.




Replacement is also necessary when cogs are found to have abnormal wear.




Take measurements at 3 - 5 points around the circumference of the belt. The belt must be replaced even if a single measurement is beyond the limit.

Limit of rubber hardness (HS) 90