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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Light Knock Hot

Light knock hot may be caused by one or more of the following conditions:
^ Loose torque converter bolts (tighten the bolts)
^ Exhaust leak at the manifold (tighten the bolts, replace the gasket if necessary)
^ Excessive rod bearing clearance (replace the bearings as necessary)
^ Detonation or spark knock (see Powertrain Management)