What is the normal operating temperature for Cummins engines?
2 Answers
Cummins engines typically operate at a normal temperature of around 90℃. Here are relevant details: 1. About Cummins: Cummins Inc. (NYSE: CMI) was established in 1919 and is headquartered in Columbus, Indiana, USA. The company is named after its founder, Clessie Lyle Cummins, a self-taught automotive technician and mechanical inventor. 2. Causes of abnormal high temperature: When the vehicle operates at high RPM, the generated heat cannot be promptly transferred to the coolant, affecting heat dissipation. This leads to increased coolant temperature, potentially causing boiling-over issues. If this occurs while driving, reduce speed first and promptly conduct an inspection.
I've been in the trucking industry for 30 years. For Cummins engines, the normal water temperature generally ranges between 90 to 95 degrees Celsius, and if the gauge needle points to the middle, it's fine. Once, while I was on a long haul, the temperature suddenly shot up to 100 degrees, and white smoke started coming from the front of the truck, nearly causing a breakdown. Luckily, I added water in time to cool it down and avoided a major overhaul. Excessive temperature can easily cause cylinder explosions or aging of seals, while temperatures too low, below 80 degrees, waste diesel and lead to incomplete combustion. I recommend checking the coolant level before every trip; as long as the antifreeze meets quality standards, it can stabilize the water temperature. Don’t slack on regular maintenance—changing the coolant every six months can extend the engine's life and save you a lot of trouble on the road.
