How hot should your coolant be with a Block heater? I left mine on my 85 300D all night and I thought when I started the car it would be piping hot with heat coming out of the vents and the temperature gauge well above 40 degrees. Boy I was disappointed!! Didn't feel any heat and the temperature gauge looked the same as if there was no heater. I am pretty sure the Heater is a good unit....

Does anyone have a block heater where the temp gauge reads above 40 when the car is started and there is heat already?