Block heater making noise?

[pwjackson]

Anyone else have a block heater that rattles when plugged in?

 

[jonathan]

Is it like poping and crackling sounding. It so that normal

 

['94IDITurbo7.3]

^^^^WHS

 

[HammerDown]

Jiffy-Pop

 

[Dave 001]

Every one I've ever seen in operation made noise like that. It actually sounds like the coolant is boiling right at the heating element but I don't know if that is what's actually going on.

 

[pwjackson]

It's more like a vibration