Block Heater Hissing Noise
I plugged my van in last night (3° at the time) and the 6.0L block heater was hissing. Never heard anything like it before, so I walked around the van listened inside and out, checked the propane etc.
I went out of my pickup with the 7.3L that had been plugged in all day, and it was making the same noise. I didn't know the block heaters made noise, not sure if it was the low temps or I typically don't hear it over the wind and whatnot.
Supposed to be -20° tonight, record low. Got everything plugged in, a lightbulb under the Jeep hood and my tractor in the garage. Gonna be fun on the bun!