Vehicle Cold Soak Procedure

WARNING: This page is about a different car, the 2019 Ford F-550 Super Duty, 2019 Ford F-450 Super Duty, 2019 Ford F-350 Super Duty, and 2019 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

To carry out this procedure, proceed as follows:

Test preparations include matching the customer conditions (if known). If not known, document the conditions. Monitor the vibration/noise duration with a watch for up to 3 minutes.
Park the vehicle where testing will occur. The vehicle must remain at or below the concern temperature (if known) for 6-8 hours.
Before starting the vehicle, conduct a visual inspection under the hood.
Listen for pumps that circulate coolant for motor, electronics, heater and battery.
NOTE: Never probe moving parts.

Isolate the vibration/noise by carefully listening. Move around the vehicle while listening to find the general location of the vibration/noise. Then, search for a more precise location by using a stethoscope or EngineEAR.
If the source of the symptom has been identified as a result of this test, proceed to the appropriate information for further diagnosis and repair. If the source has not been identified, continue with the road test.