1999 Ford Taurus Thermostat Change

Tiny
DLEJ
  • MEMBER
  • 1999 FORD TAURUS
Engine Cooling problem
1999 Ford Taurus 6 cyl Two Wheel Drive Automatic

I can't seem to find my thermostat on my '99 Ford Taures. My manuel shows where it is, but it's not there. Is there another location that I'm missing? Is my engine somehow different? Thanks
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Monday, September 14th, 2009 AT 7:29 PM

12 Replies

Tiny
BLUELIGHTNIN6
  • EXPERT
It depends on your vehicle's engine type.

3.0 Vulcan, 12 valve engine:

Looking in from the front of the car, it is on the right side of the engine, where the radiator hose goes in - remove the housing's three bolts - the thermostat will be inside

Follow the large top radiator hose to the engine block. It connects to a little dome-shaped fitting held on by three bolts. The thermostat is under it. Be sure to replace the gasket (after completely removing the old gasket) when you replace the thermostat.

3.0 Duratec, 24 valve DOHC engine:

If you have the 24 valve DOHC engine, the thermostat is on the other side (passenger) at the bottom front of the engine, accessible from underneath.
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Monday, September 14th, 2009 AT 7:33 PM
Tiny
DLEJ
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Then that's it! I have the Duratec engine you mentioned!

Gads! Is there anything easy to repair on this car? LOL

Thanks!
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Monday, September 14th, 2009 AT 7:41 PM
Tiny
DLEJ
  • MEMBER
BTW, I'm replacing the thermostat as a last ditch effort to thwart off my engine over-heating problem.

It gets hot quick when I run my AC, and living in Phoenix makes AC a must.

Do you think my thermostat is the cause?

Thanks again!
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Monday, September 14th, 2009 AT 7:46 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Most likely not. When you turn on the A/C, does the cooling fan(s) turn on for the radiator?
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Monday, September 14th, 2009 AT 7:50 PM
Tiny
DLEJ
  • MEMBER
Yes they do, and they seem to run constantly.

I also had a new water-pump installed recently.
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Monday, September 14th, 2009 AT 7:52 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
And it only overheats with the A/C turned on?
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Monday, September 14th, 2009 AT 7:53 PM
Tiny
DLEJ
  • MEMBER
Yes, otherwise it runs normal. With the exception of days that get to 115 degrees. Lol
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Monday, September 14th, 2009 AT 7:59 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Ok, honestly I wouldn't waste time checking the thermostat. If thermostat was sticking then the A/C would not have much to do with the overheating.

When was the last time you have had the radiator flushed?
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Monday, September 14th, 2009 AT 8:05 PM
Tiny
DLEJ
  • MEMBER
I was going to install a cooler thermostat in hopes it would do the trick. The engine coolant is up to par, also.

The only other thing I can think of is either a bad radiator, or a bad head gasket, or worse, a cracked block.

Thanks for all your help, I appreciate it!
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Monday, September 14th, 2009 AT 8:06 PM
Tiny
BLUELIGHTNIN6
  • EXPERT
Easy way to check for bad head gasket or head is to let vehicle cool off. Open hood and remove radiator cap while cool. Get in and start vehicle (ensure noone is around front of vehicle). If coolant shoots up out of radiator cap opening then you have backpressure caused by faulty head gasket or head. If no coolant shoots out then gasket is most likely OK. Sounds more like dirty, corroded up radiator.
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Monday, September 14th, 2009 AT 8:08 PM
Tiny
DLEJ
  • MEMBER
I haven't had it flushed since I've owned the car. Three and a half years.

The overheating problem has always been there, too. I could drive what was necessary before it would get too hot, but this year it's getting worse. It overheats within 5 miles of driving.
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Monday, September 14th, 2009 AT 8:10 PM
Tiny
DLEJ
  • MEMBER
Thanks! You may be right about the radiator being clogged up. I'll check that before I crawl under it to change the thermostat, for sure! LOL

Thanks again!
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Monday, September 14th, 2009 AT 8:13 PM

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