Need a little more info than " bad heater ". Explain what the condition is, what was done, if anything before, and what it was like before. And what is it like now.
Yes, if it is the same year.
Yes.
It is on the left hinge of the trunk
Crown victoria 98
firewall 4 - 8 3 - 7 2 - 6 1 - 5 front of Crown Victoria
I doubt it.
5 lug nuts ...
on my 98 crown vic you have to push in the head light switch
I would assume the 1997 Ford Explorer is heavier than the 1998 Ford Crown Victoria ( especially if the Explorer is 4X4 or AWD or has the 5.0 liter V8 )
The most common signs of a bad heater core are; no heat or fluid leaking into the passenger compartment. The heater core can have a leak or it can be plugged.
the heater core is going out
I need to know the type of compressor (make) before I can answer that question.