Packard Forum Index » V-8 (1955-56)

Just curious, how long should you be able to idle a warmed-up car before you have overheating problems? The V8's specifically. Assume a room temperature day.

Until you run out of gas.

I have always followed the rule that warm up is best done underway at low speed.

I'd avoid idling for more than ten minutes. Much less is better, especially when running an air conditioner. Always park facing the breeze, if you can.
Anything that diminishes cooling system function will contribute to overheating, as will problems with timing and excessively low oil pressure. Radiators can look clean and still have a lot of lint-like seed debris, dust, and insect debris lodged in the core. Clutch fans must operate properly, and all shrouds must be in place for best results. Pulleys should be the correct ones to assure that accessories run at the proper speed.