What is the reason for abnormal oil temperature display in Cummins 6B?

2 Answers
OKhloe
07/28/25 7:40pm
Cummins 6B abnormal oil temperature display is caused by insufficient or no oil. Introduction to Lubricating Oil: Lubricating oil is a liquid or semi-solid lubricant used in various types of vehicles and mechanical equipment to reduce friction, protect machinery and processed parts. It primarily functions in lubrication, auxiliary cooling, rust prevention, cleaning, sealing, and buffering (Roab). Basic Meaning of Lubricating Oil: Lubricating oil and grease are collectively referred to as a type of 'lubricant'. Simply put, a lubricant is a substance placed between two relatively moving objects to reduce the friction generated by their contact.
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VonAubrey
08/12/25 12:33am
I've encountered quite a few cases of abnormal oil temperature display in Cummins 6B engines during repairs. The temperature sensor might be faulty or inaccurate—it's prone to aging due to long-term exposure to high temperatures, leading to readings that are either too high or too low. Alternatively, there could be an issue with the cooling system, such as a clogged radiator or a faulty water pump, disrupting coolant circulation and causing oil temperature to go out of control. Insufficient or contaminated engine oil, or a clogged oil filter, can also lead to unstable oil temperature. On the electrical side, a blown fuse or loose wiring connections can cause errors in signal transmission. I recommend first checking the sensor and fuses to prevent excessive temperature from damaging engine bearings or cylinder liners. Addressing the issue early saves both time and money.
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