Food for thought
If you find that you have a bad block heater and are going to replace it you have many diff. ones to choose from. There are the ones from the dealer that is ~750Watt all the way to 1500Watt that all fit in the same hole and do the same thing. It all depends on were you live, how fast you want it to heat up, and if you are going to leave it pluged in all night and don't want the meter to spin that fast all night long.