Engine Block Heaters; Cold Weather Lifesavers

A block heater will not only give you an easier startup when the weather dips below freezing, it will reduce the overall wear and tear on the engine parts as well as grant you better fuel consumption. Plugging the block heater in will warm up the fluids, such as the coolant and oil, to keep them warmer and more effective against engine wear.

At temperatures below 40 degrees Fahrenheit or 4 degrees Celsius, certain hydrocarbons in the diesel fuel begin to gel and become fully gelled around 15 degrees Fahrenheit or -9 degrees Celsius. This will cause the engine to run really rough, with lower power than normal, or not at all. Using a block heater or a fuel additive can eliminate this issue.

Generally, in cold weather, you will only need to have your block heater plugged in for 2-3 hours to warm the engine up. A 1972 University of Saskatchewan study found that four hours of warming an engine with a block heater will get the fluids in the engine as warm as they can get while being warmed up with a block heater. Any longer, and the warm air will start seeping through the engine block and dispersing into the air. Leaving a block heater plugged in overnight will be okay, but once the fluids in the engine are heated up, it will only raise the electricity bill.

Shop Engine Block Heaters