Grab a screwdriver, touch the metal end to the non-rotating portion of the pullies, stick your ear to the other end, and listen for a “whirrrrrrrr.” Sounds to me like a water pump or idler failing.
Grab a screwdriver, touch the metal end to the non-rotating portion of the pullies, stick your ear to the other end, and listen for a “whirrrrrrrr.” Sounds to me like a water pump or idler failing.