Description
Product Overview
The Zerostart Heavy Duty Engine Block Immersion Heater is engineered for demanding commercial and industrial applications. Constructed from machined aluminum, the heater offers robust durability while delivering 1500 watts of heat at 120 volts. Its 1 in NPT thread ensures a secure, leak‑free connection to the engine block freeze plug. Weighing just 1.28 lb and measuring 7.4 × 6.14 × 3.7 in, it provides powerful performance without adding unnecessary bulk. Certified by CSA, this unit meets stringent safety standards for cold‑weather operation.
Usage

Ideal for fleets, construction equipment, and agricultural machinery, the heater excels in sub‑zero environments where rapid engine warm‑up is critical. It is compatible with Caterpillar, Detroit Diesel, International/Navistar, and Perkins engines—consult the Zerostart catalog for exact model matches. Install the heater in the freeze‑plug location, connect to a 120 V power source, and enjoy dependable starts even after prolonged storage.
Why Choose Us
Zerostart combines decades of engineering expertise with rigorous quality control. Each heater undergoes CSA testing to guarantee electrical safety and thermal reliability. The machined exterior resists corrosion and physical impact, extending service life beyond competing plastic‑cased units. Our dedicated support team provides detailed installation guidance, ensuring correct fit and optimal performance for every engine type.
Key Features
- 120 V, 1500 W output for fast engine warm‑up
- 1 in NPT thread matches standard freeze‑plug sizes
- Machined aluminum housing for durability and heat transfer
- CSA approved for safety in commercial applications
- Vehicle‑specific fit for Caterpillar, Detroit Diesel, International/Navistar, and Perkins engines
FAQ
What voltage does the heater require?
The heater operates on standard 120 V AC power, making it compatible with most workshop and field power sources.
Is the heater compatible with my engine model?
It is designed for Caterpillar, Detroit Diesel, International/Navistar, and Perkins engines. Refer to the Zerostart catalog for exact model numbers and fitment details.
How long does it take to warm an engine?
Warm‑up time varies with ambient temperature and engine size, but most users report a ready‑to‑start engine within 10‑15 minutes in sub‑zero conditions.
Do I need any special tools for installation?
Installation requires a standard 1 in NPT wrench and basic hand tools. The heater replaces the factory freeze plug, so no additional adapters are needed.
Is the heater covered by a warranty?
Yes, Zerostart provides a one‑year limited warranty covering manufacturing defects and material failures.







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