High pitched tone at temperatures below 0 degrees on Dodge Caliber

Problem Description and Possible Solution
A high pitched tone may be heard from the engine compartment at temperatures below 0 degrees. The repair involves replacing the bypass valve and four o-rings on the back of the radiator.
Problem Data
RepairPal Verified
Average mileage: (–)
1 model year affected: 2007
3 people reported this problem