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)

Or, hide this message: temporarily or permanently

Maintenance Schedules


Emission Component

EGR Control Valve - Replace every 60,000 miles
EGR Tube & Passages - Clean and/or Replace every 60,000 miles
Engine Air Filter - Replace every 30,000 miles
Oxygen Sensor - Replace every 82,500 miles
PCV Filter - Replace every 30,000 miles
PCV Valve - Replace every 60,000 miles
Vacuum Operated Emission System Components -
Inspect & Replace if Necessary every 60,000 miles