ATF again under Republican fire. The much-maligned Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) is again coming under fire from Republicans and gun rights groups, who are pushing to rein in the agencyâs power â or abolish it altogether.
A North American block heater cord and plug. A block heater warms an engine to increase the chances that the engine will start as well as warm up the vehicle faster than it normally would in extremely cold weather.The most common type is an electric heating element in the cylinder block, connected through a power cord often routed through the vehicle's grille. block heater warms an engine to increase the chances that the engine will start as well as warm up the vehicle faster than it normally would in extremely cold weather. The most common type is an electric heating element in the cylinder block, connected through a power cord often routed through the vehicle's grille.
As the heater core valve opens, coolant is allowed to be pumped out of the engine block and into the heater core by the vehicle's water pump. The warm coolant radiates heat through the heater core's tubes and fins, where it is forced into the vehicle's passenger cabin by an electric fan.he heater core valve acts much like a thermostat in that it regulates the amount of heat produced by the heater through the amount of fluid it allows to flow into the heater core. If not for the heater core valve, the vehicle's heater would be in a continuous state of warming.