radiators are cold on the bottom and hot on the top?
there should be a drain plug on all radiators on the bottom of radiator on either bottom corner or possibly in middle on bottom
Not all radiators have petcocks. Simply disconnect the bottom hose to drain.
It isn't particularly. It's usually included in radiator fluid all year round. But what might happen to water when it's cold?
There could be trapped air in the system. Turn off all rads on your ground and third floor and if needed one of the two on your second floor . This should force any trapped air into the rad and you can bleed it off. Good luck!!
Put all the radiators on! SIMPLE!
No
No, they used to be made from copper or brass.
if there is not a drain valve cock on the bottom left part of the radiators wall facing the fire wall the other option will be to unfasten the water return hose gently pull it of the radiator until all the fluid has drain repeat if necessary if fluid is very contaminated, all this has to be perform only when the car is cold never after operating the vehicle.
Answer There might be air trapped in the radiator, try bleeding. It's usually a flow problem. If the valves on all of the radiators are wide open, the steam will flow through the path of least resistance, often leaving some of the radiators lacking for heat. Try turning down the flow on some of the hotter radiators. You will need to spend a little time adjusting the flow... assuming that you have flow adjusting valves on the radiators. These old cast iron radiators have sections that are bolted together. Each section has a gasket to keep the steam or hot water INSIDE the radiator. Of course these old radiators collect rust over the years unless you are very careful and scientific about your water chemistry (most folks are not). You probably have a plugged hole in one of the gaskets between the section of the radiator that is getting hot and the section that is not getting hot. This "cold" section is being bypassed and not receiving any flow.
Most Chevy Silverado radiators have oil and transmission coolers to help prolong life and performance. All have transmission coolers but fewer have oil coolers.
Naturally on all radiators, the drain-valve is at the very bottom if you look under the actual radiator for a butterfly-like valve with a hole inside it for the water to come out.
because the radiators were all on full