BLOCK HEATERS & ACCESSORIES

Block Heaters & Accessories For Peterbilt Trucks

Cold weather starting puts enormous strain on diesel engines — thick oil, gelled fuel, and a cold block force the starter and batteries to work far harder than in warmer conditions. Engine block heaters keep coolant and oil at a workable temperature so your Peterbilt fires cleanly on the first crank, even in sub-zero conditions. We carry block heaters, cord sets, and accessories compatible with Peterbilt trucks running PACCAR MX and Cummins diesel engines.

Frequently asked questions about block heaters & accessories

How long before startup should I plug in a block heater?

Most technicians recommend plugging in 2–4 hours before startup when temperatures are below freezing. In extreme cold — below -20°F — overnight connection is advisable. A timer can help manage plug-in cycles automatically, protecting the heating element from continuous operation while ensuring the engine is warm when the driver is ready to roll.

What wattage block heater do I need for a Peterbilt diesel?

Typical Class 8 diesel engines use 1,000–1,500 watt block heaters for most cold-weather applications. Higher wattage units (1,500–2,000W) may be appropriate for very large displacement engines or extreme cold environments. Always verify compatibility with your specific engine series — PACCAR MX-13 and Cummins ISX applications may have different element specifications.

My block heater cord is damaged — can I replace just the cord?

Yes. Replacement cord sets with the appropriate male plug and weatherproof connector are available separately and are far less expensive than replacing the entire heater element. Make sure the cord set is rated for outdoor use in cold temperatures and that the amperage rating matches your heater element's draw.

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