I own a 1994 Ford Tempo GL, 2.3l, 4 door, 135,000 km. I seem to have
intermitent heat from luke warm to hot heat. Now I don't know if it is the
extreme cold of -30c or my car, but when I start it in the morning, it
takes about 7 to 10 minutes of driving to get luke warm heat, and around 15
to 20 minutes to get hot heat. Now sometimes it takes more or less time. Is
it suppost to take this long ? So because it intermitent between warm and
hot is there a way to tell if it is the heater core starting to fail or a
thermostat failing ? I have no smell of anti-freeze and no leaking of
anti-freeze in the car, but I know that you won't always get those signs.
Also I know that my thermostat housing is corroded and when the last
termostat was put in just over a year ago, the housing was cleaned, it was
double gasketed with silicone around it. But was told I might have to
replace the housing if it leaks and by-passes the thermostat again, because
the machanic wasn't sure how long it would last. Any suggestions ? Also I
have no idea how hot my car gets because my temp. gauge doesn't fully work,
it's off because it doesn't get passed the 1/3 mark.
You could try flushing out the heater core, they're pretty easy to get to
on those tempo's. Just pull the in and out lines and lightly flush it with
a water hose. If a bunch of crap comes out it's probably time to replace
it. Does the antifreeze stay full? What is the heat gauge doing?
If the gauge maintains a good temperature all the time I would put my money on the heater core. Check the linkage to the box to make sure it is closing all the way.