Diesel engines such as the 12-valve Cummins are perfectly capable of starting at Freezing temperatures, all the more whether a block heater hasn't been used, if the battery and glow plugs are in admirable shape.
Battery
Diesel engines annex higher compression ratios than petrol engines. In that of this, added battery force is required to Eccentric person a diesel engine at bitter temperatures. While a V-8 Gauze engine may desire 300 to 400 amps of electrical capability to begin at temperatures below -4 Fahrenheit, a diesel engine may demand nearly twice as even amperage for its starter to compress Sufficiently air.
Glow Plugs
Diesel engines heat air by compressing it and then practice the hot air to ignite the fuel, rather than using spark plugs like gasoline engines. There is also preheating equipment in many engines, such as glow plugs, which are heaters screwed into cylinders that glow red hot when the engine is cranking. If glow plugs are not working properly, a diesel engine may be difficult to begin and run rough initially while producing white smoke. These problems should go away as the cylinders warm up.
Cold Starting Tricks
In extremely low temperatures, turn the key on, off and on again before cranking the engine.Certain diesel vehicles have a glow plug light on the dash, which turns on when the glow plugs are on. To begin in cold weather, you should crank the engine as soon as the light turns off, before the air cools off. In vehicles without a glow plug light, wait five seconds after turning the key on before cranking the engine.
