When temperatures dip below freezing, there are many good reasons to preheat the engine. The different metals inside expand with heat at different rates, so quickly cranking up the engine when the pieces and parts are cold can cause damage. Additionally, cold oil doesn’t lubricate the parts as well. Starting the engine at temperatures below freezing is also hard on the battery and starter.
Preheat Saves Parts
Key Takeaways:
- Preheating an engine in freezing temperatures is vital to prevent damage from differential metal expansion, ensure adequate lubrication with cold oil, and reduce strain on the battery and starter.
- Most manufacturers require preheating below 20°F, but it's advisable below freezing; systems for piston-engine airplanes cost $500-$1,500 and take at least a couple of hours to warm up.
- Remote control options, like the $299 SwitchBox, allow users to activate preheaters with a smartphone, offering convenience for managing the multi-hour preheating process.
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