Operation CHARM: Car repair manuals for everyone.
Home >> Cadillac >> 2003 >> CTS V6-3.2L VIN N >> Repair and Diagnosis >> Engine, Cooling and Exhaust >> Cooling System >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> Engine Overheating
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

Engine Overheating

Engine Overheating


Engine Overheating / Steps 1 - 3 (Continued):




Engine Overheating / Steps 4 - 18:







Diagnostic Aids
The engine may overheat due to an intermittent operation of one of the following components:
- The after boil heater pump
- The coolant bypass solenoid
- The coolant bypass valve
- The electric cooling fans
- The thermostat


For electrical inspection of the cooling fans and the after boil heater pump, refer to Testing for Intermittent and Poor Connections.
Diagnostic Aids


pro multis · About Operation CHARM