It just recently warmed up outside.
I have a 1990 Ford Tempo 4 door.
My heat gauge has been fluctuating all over the place and the heat from my
car has been Hot warm mild and back and forth. It will go up about 3/4 of
the way to the top and then go down the 1/4 to the bottom and sit for a
few and then go back up and like this the entire trip?
Assuming you have made sure there's plenty of coolant in the radiator.
Pull the do no remove cap and look, add 50-50 mix, check again once it's
cooled down again. Coolant should always be all way to cap.
Make sure the rad cap and tubing to the overflow bottle is good.
Yeh, I'm a Krusty old Geezer, putting up with my 'smartass' is the price
you pay..DEAL with it!
Saw this problem in an 88' Tempo with the 2.3 HSC engine. The radiator
kept burping antifreeze and the temp gauge was erratic. I don't recall
if the heater was acting up because it wasn't cold enough to be using it
at that time of year. It turned out to be the head gasket.
We had a 91 Ford ranger in the shop Thursday that was doing this.He was also
complaining of no heat.But the Rad. tank was 1/2 way low too.
I pressure checked it, and found no leaks.
The motor was warmed up,but the temp gauge was way way down almost to the
bottom "peg" I suspected a missing or stuck open T-Stat, as a start.
We put in a new T-stat and flushed the system out, and refilled it, but it
was still the same.
Driving up the road, the heat was fine, but as soon as you come to a stop
light, it would blow cold.
We now suspect a head gasket .
NAPA sells a test kit, it don't cost too much, that you fill with a test
liquid, and place over the rad. filler neck (motor running) and pump up air
into. If the test liquid stays the same color, you are OK, if it turns "piss
yellow" you have a issue.
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.