Caterpillar 9X-3293 GP Jacket Water Heater Unit

Caterpillar 9X-3293 GP Jacket Water Heater Unit preheats engine coolant to speed cold starts and reduce wear in diesel engines. GP jacket water heaters are designed to heat jacket water as a starting aid, helping engines reach operating temperature quickly. In Caterpillar’s jacket water heater family, 240V single-phase configurations are offered, with a representative model rated at 9 kW (for example, Cat 307-3268). Caterpillar guidance recommends maintaining jacket water temperature around 38–43°C (100–110°F) for best starting performance. The GP designation indicates the heater is part of Cat’s GP jacket water heating solutions intended for integration with engine cooling systems, supporting reliable cold-weather starts and helping extend engine life. The part number 9X-3293 identifies this specific GP Jacket Water Heater Unit.