Do I have to drain the anti-freeze or oil out to replace the Block Heater on F-350 7.3L Deisel ?

Asked by notamechaniceither Jan 05, 2013 at 08:28 AM about the 1995 Ford F-350 4 Dr XLT Crew Cab LB

Question type: Maintenance & Repair

F-350, 7.3 Deisel Block Heater located directly above the oil filter. The power cord to it is good but the block heater is fried. Do I have to drain the oil or the anti-freeze coolant. If I take the screw-in heater out is anti-freeze going to go everywhere or is the heater in a dry sleeve. Just trying to save a few bucks to do this myself.

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tenspeed answered 11 years ago

I'm not positive on your diesel engine. The block heaters I have had experience with are submerged in coolant. I would have a catch pan under the engine and proceed slowly.

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