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Freeze Plug Heater, also referred to as a block heater or frost plug heater is the most reliable and efficient way to pre-heat your engine. Operates by being directly submerged into coolant and heating the block. Requires mechanical ability to install. Most efficient and reliable way to pre-heat engine block. Operates by being directly submerged into coolant and heating the block. Applications are specific to part numbers. Also referred to as freeze plug heaters or block heaters. Installation requires mechanical ability.
Fits Caterpillar engines: 3204 / 3208 / 3150 / 3160 / 4036, (1984-2001) Jeep 2.4L, (1969-1990) Chevy/GM 454 Cubic inch w/ 7.4L, Ford 3000, 4000, 5000, 6000, 8000 & 9000 with 1-3/4" frost plug (1968-1970).