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

Symptom Flow

Symptom Action to Take

Squeal, Click or Chirp Go to 25-1. 25-1 Check Accessory Drive

Rumble, Grind Go to 25-4. 25-4 Check Accessory Drive Components

Rattle Go to 25-5. 25-5 Check For Loose Components

Hiss Go to 25-6. 25-6 Check Vacuum Distribution

Snap Go to 25-11. 25-11 Check Secondary Ignition

Rap, Roar Go to 25-12. 25-12 Check Exhaust System

Knock Go to 25-14. 25-14 Check Basic Engine