Why Your Semi-Truck Is Overheating

Why Your Semi-Truck Is Overheating

Semi-truck drivers are bound the face obstacles such as breakdowns on the road from time to time. Overheating is one of the most common forms of a breakdown and it’s important for a truck driver to identify the source of the issue in a timely manner. We offer a variety of aftermarket parts for various truck brands, including Kenworth, Mack, Volvo, and more! To help you get back on the road, learn why your semi-truck is overheating.  


A thermostat in a semi-truck opens and closes based on the heat from the engine. When the thermostat closes, it allows coolant to flow to the engine and warm it up quickly. If a thermostat can’t open and close properly, then this process will not be able to occur and can cause a semi-truck to overheat.  

Radiator Hoses 

A semi-truck might also be overheating due to the radiator hoses, which could be leaking because the part is known to wear down fast. This can be detected by spotting cracks and holes in the hose itself.  The best way to avoid this type of issue is to get the radiator hoses replaced every five years or so. A radiator cap can also be the cause behind overheating.  

Head Gasket 

Another leak that might cause your semi-truck to overheat lies with the head gasket. However, a semi-truck's gasket could also be blown, which can be diagnosed if there is smoke coming out of the hood and you notice bubbling coolant in the head gasket area. The best thing you can do is replace your head gasket.  

Loose or Broken Belts 

A final reason why your semi-truck is be overheating could be that belts are either loose or broken. Belts are responsible for ensuring the coolant is flowing through the system at the right speed. When a belt is broken or loose, then the engine can overheat because there isn’t enough coolant flowing to the engine.