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Temperature plays a large part in how an engine runs. If you want your engine to run efficiently, its temperature needs to stay within an ideal range. An incorrect temperature can have an impact beyond engine efficiency too. If the engine is too hot, parts could be severely damaged, or too cold and it will struggle to start.
Most of the engine’s parts are made from metal, which expands or contracts depending on its temperature. Other parts, like gaskets, tend to fail in extreme heat. +Read more
This is where the engine’s cooling system comes in. The 5.9 Cummins thermostat gauges the engine’s temperature; that temperature reading dictates what the rest of the engine’s cooling system will do. Parts like the 5.9 Cummins water pump circulate coolant between the engine and the 5.9 Cummins radiator.
The coolant runs through a series of hoses like the 5.9 Cummins lower radiator hose. The radiator dissipates heat through a series of thin fins that greatly increase its surface area. This, coupled with airflow generated by the truck’s motion, is enough to keep the coolant at a reasonable temperature.
Dissipating heat isn’t the only issue. In colder climates, the engine may become too cold and struggle to start. Luckily, there is a solution. Parts like the 5.9 Cummins engine block heater are designed to warm the engine and ensure it starts the first time, even in an extremely cold climate. If getting your 5.9L Cummins 12V started on a winter morning is a laborious process, an engine block heater is a great investment.
It isn’t just the engine that has to be kept at an ideal temperature, the person driving the truck can overheat too. That’s where the AC system comes in. The truck’s AC system is fairly simple. A 5.9 Cummins AC compressor forces pressurized coolant through a 5.9 Cummins AC condenser which in turn is cooled by a fan.
The cold coolant then makes its way to the blowers, where air is blasted over the cold lines and into the cabin. If your AC system is no longer working, the compressor is a very common point of failure. Sometimes it can be “charged” with a can of refrigerant, but if that doesn’t work then it’s time to consider a 5.9 Cummins AC compressor replacement.
