Question:

>The temperature gauge on my Explorer hardly reaches the lowest line on the >gauge , especially when the fan is blowing hard. Could this be a thermostat >problem?

It sounds like it.  Get it replaced.  If you DYI, make sure the little vent hole in the thermostat is up when you install it.  That hole lets air vent out of the block. >Also, how hard is it to change the spark plugs on the 4.0 Liter engine in >this truck? Does it require any special tools?

No, but you’ll find that getting to the rear plug on the passenger side is easier if you remove the right front wheel and go thru the  wheelwell. — University of California, Irvine     phone:       949-824-6926 Office of Academic Computing         FAX:         949-824-2069

Response:

The temperature gauge on my Explorer hardly reaches the lowest line on the gauge , especially when the fan is blowing hard. Could this be a thermostat problem? Also, how hard is it to change the spark plugs on the 4.0 Liter engine in this truck? Does it require any special tools? Bob Bouma

Response: