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Old 10-17-2005, 15:01   #1 (permalink)
Phil Nospam
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96 Taurus Overheating

Problem was very intermittant and hard to diagnose for many months - took it
to shop and they couldn't duplicate the problem.
Now the problem is repeatable but I'm getting widely varying diagnoses and
costs. Maybe someone here can help...

96 Taurus, 3.0 liter V6, VIN U...In stop and go traffic the car starts to
overheat (this was intermittent for a while but now happens regularly). On
interstate the temperature is about normal but heats up rapidly when I hit
the exit ramp and slow down to 25 MPH or pull into the rest area. Some said
thermistat so I replaced that - no help. Some said clean and flush cooling
system and add fresh coolant - did that (it was time anyway) and no help.
One shop is now recommending radiator replacement at $690 (labor intensive
because front bumper/grille/headlights must be removed). One shop says
water pump but another says no because the pump isn't making any strange
noises. All have done a pressure test and say that is fine. This model
Taurus uses coolant reservior so their's no radiator cap on the radiator to
be able to visually look inside the radiator.

Here's some things I've noticed -
1) upper radiator hose from thermistat to radiator is hot and pressurized at
normal or elevated operating temp
2) according to one mechanic the lower radiator hose from radiator to water
pump seems significantly cooler than it should be (I can't reach it) at
normal or elevated operating temp. This suggests restricted flow through the
radiator.
3) heater hose is hot near water pump but cools rapidly as it approaches the
firewall
4) if I turn on the heater after the car warms up it starts blowing warm
air, but usually cools down to approximately 80 degrees within about 2-3
minutes - the faster the car is moving the faster it cools off. If I turn
off heater and adjust temp back to low for a while, then turn heater back on
and adjust temp to high, it starts blowing warm air and cools rapidly again.
5) this car uses 2 electric fans on radiator and both "appear" to be
functioning normally.

Thanks in advance for your help,

Phil


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Old 10-17-2005, 15:01   #2 (permalink)
Sharon K.Cooke
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Re: 96 Taurus Overheating

Phil Nospam wrote:
>
> Problem was very intermittant and hard to diagnose for many months - took it
> to shop and they couldn't duplicate the problem.
> Now the problem is repeatable but I'm getting widely varying diagnoses and
> costs. Maybe someone here can help...
>
> 96 Taurus, 3.0 liter V6, VIN U...In stop and go traffic the car starts to
> overheat (this was intermittent for a while but now happens regularly). On
> interstate the temperature is about normal but heats up rapidly when I hit
> the exit ramp and slow down to 25 MPH or pull into the rest area. Some said
> thermistat so I replaced that - no help. Some said clean and flush cooling
> system and add fresh coolant - did that (it was time anyway) and no help.
> One shop is now recommending radiator replacement at $690 (labor intensive
> because front bumper/grille/headlights must be removed). One shop says
> water pump but another says no because the pump isn't making any strange
> noises. All have done a pressure test and say that is fine. This model
> Taurus uses coolant reservior so their's no radiator cap on the radiator to
> be able to visually look inside the radiator.
>
> Here's some things I've noticed -
> 1) upper radiator hose from thermistat to radiator is hot and pressurized at
> normal or elevated operating temp
> 2) according to one mechanic the lower radiator hose from radiator to water
> pump seems significantly cooler than it should be (I can't reach it) at
> normal or elevated operating temp. This suggests restricted flow through the
> radiator.
> 3) heater hose is hot near water pump but cools rapidly as it approaches the
> firewall
> 4) if I turn on the heater after the car warms up it starts blowing warm
> air, but usually cools down to approximately 80 degrees within about 2-3
> minutes - the faster the car is moving the faster it cools off. If I turn
> off heater and adjust temp back to low for a while, then turn heater back on
> and adjust temp to high, it starts blowing warm air and cools rapidly again.
> 5) this car uses 2 electric fans on radiator and both "appear" to be
> functioning normally.
>
> Thanks in advance for your help,
>
> Phil


It's an airflow or liquid flow problem. Since it runs at normal temp on highway,
but heats up when slowing down, I'm betting on the fan controller or the
condenser fins are mashed down, impeding normal airflow. You might also try a
new pressure cap on the coolant reservoir.
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Old 10-17-2005, 16:01   #3 (permalink)
Backyard Mechanic
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Posts: n/a
Re: 96 Taurus Overheating

95% certainty: Water pump

Wait till you see what it looks like when you remove it!

;)

then take it to the shop that said it couldnt be because it aint making
"noises"



"Phil Nospam" <philnospam@dontwantnospam.com> wrote in
news:BzU4f.8980$OM.577691@twister.southeast.rr.com:

> Problem was very intermittant and hard to diagnose for many months -
> took it to shop and they couldn't duplicate the problem.
> Now the problem is repeatable but I'm getting widely varying diagnoses
> and costs. Maybe someone here can help...
>
> 96 Taurus, 3.0 liter V6, VIN U...In stop and go traffic the car starts
> to overheat (this was intermittent for a while but now happens
> regularly). On interstate the temperature is about normal but heats
> up rapidly when I hit the exit ramp and slow down to 25 MPH or pull
> into the rest area. Some said thermistat so I replaced that - no
> help. Some said clean and flush cooling system and add fresh coolant
> - did that (it was time anyway) and no help. One shop is now
> recommending radiator replacement at $690 (labor intensive because
> front bumper/grille/headlights must be removed). One shop says water
> pump but another says no because the pump isn't making any strange
> noises. All have done a pressure test and say that is fine. This
> model Taurus uses coolant reservior so their's no radiator cap on the
> radiator to be able to visually look inside the radiator.
>
> Here's some things I've noticed -
> 1) upper radiator hose from thermistat to radiator is hot and
> pressurized at normal or elevated operating temp
> 2) according to one mechanic the lower radiator hose from radiator to
> water pump seems significantly cooler than it should be (I can't reach
> it) at normal or elevated operating temp. This suggests restricted
> flow through the radiator.
> 3) heater hose is hot near water pump but cools rapidly as it
> approaches the firewall
> 4) if I turn on the heater after the car warms up it starts blowing
> warm air, but usually cools down to approximately 80 degrees within
> about 2-3 minutes - the faster the car is moving the faster it cools
> off. If I turn off heater and adjust temp back to low for a while,
> then turn heater back on and adjust temp to high, it starts blowing
> warm air and cools rapidly again. 5) this car uses 2 electric fans on
> radiator and both "appear" to be functioning normally.
>
> Thanks in advance for your help,
>
> Phil
>
>
>


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Old 10-17-2005, 19:01   #4 (permalink)
Shoe Salesman
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Posts: n/a
Re: 96 Taurus Overheating


"Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
news:Xns96F2B63EE6D64pettyfogery@207.115.63.158...
> 95% certainty: Water pump
>
> Wait till you see what it looks like when you remove it!
>

OK, I've had a good amount of experience with Taurus's and have never seen a
water pump just quit for no reason...You've got to clue us in on what you
think it is....


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Old 10-17-2005, 19:01   #5 (permalink)
Tom Adkins
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Posts: n/a
Re: 96 Taurus Overheating

Shoe Salesman wrote:
> "Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
> news:Xns96F2B63EE6D64pettyfogery@207.115.63.158...
>
>>95% certainty: Water pump
>>
>>Wait till you see what it looks like when you remove it!
>>

>
> OK, I've had a good amount of experience with Taurus's and have never seen a
> water pump just quit for no reason...You've got to clue us in on what you
> think it is....
>
>

3.0L Tauri of that era suffered from water pump impeller erosion. There are probably
no fins on the water pump impeller left to move the water. Unless flushed recently,
I'll bet the coolasnt is brown also.
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Old 10-17-2005, 20:01   #6 (permalink)
trainfan1
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Posts: n/a
Re: 96 Taurus Overheating

Backyard Mechanic wrote:

> 95% certainty: Water pump
>
> Wait till you see what it looks like when you remove it!
>
> ;)


Bingo.

Rob
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Old 10-17-2005, 20:01   #7 (permalink)
Shoe Salesman
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Posts: n/a
Re: 96 Taurus Overheating


"Tom Adkins" <newton5@remove.comcast.net> wrote in message
news:aJmdnQN33MQaz8neRVn-tA@comcast.com...
> Shoe Salesman wrote:
>> "Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
>> news:Xns96F2B63EE6D64pettyfogery@207.115.63.158...
>>
>>>95% certainty: Water pump
>>>
>>>Wait till you see what it looks like when you remove it!
>>>

>>
>> OK, I've had a good amount of experience with Taurus's and have never
>> seen a water pump just quit for no reason...You've got to clue us in on
>> what you think it is....

> 3.0L Tauri of that era suffered from water pump impeller erosion. There
> are probably no fins on the water pump impeller left to move the water.
> Unless flushed recently, I'll bet the coolasnt is brown also.


Oh that's why I haven't seen it. My experience has been with cars that were
taken care of..... Oh well, the bearing is probably ready to let go anyway.
It sure won't hurt it to put a water pump on it even if the impeller is
good.


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Old 10-17-2005, 22:01   #8 (permalink)
Phil Nospam
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Posts: n/a
Re: 96 Taurus Overheating


"Tom Adkins" <newton5@remove.comcast.net> wrote in message
news:aJmdnQN33MQaz8neRVn-tA@comcast.com...
> Shoe Salesman wrote:
> > "Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
> > news:Xns96F2B63EE6D64pettyfogery@207.115.63.158...
> >
> >>95% certainty: Water pump
> >>
> >>Wait till you see what it looks like when you remove it!
> >>

> >
> > OK, I've had a good amount of experience with Taurus's and have never

seen a
> > water pump just quit for no reason...You've got to clue us in on what

you
> > think it is....
> >
> >

> 3.0L Tauri of that era suffered from water pump impeller erosion. There

are probably
> no fins on the water pump impeller left to move the water. Unless flushed

recently,
> I'll bet the coolasnt is brown also.


Thank you everyone for your responses.

I like the thought of the impeller erosion. Well I don't LIKE it, but it
makes some sense. About 2 years ago I had to replace one of the freeze
plugs because it corroded (eroded). About six months later a second one
suffered the same fate, and I believe that one was located on the same side
of the engine as the water pump. If the freeze plugs are corroding from the
inside, then it makes sense that other light/thin components in the cooling
system could suffer the same problem.

Further searching online led me to stories about recalls and/or TSB's about
this problem.
Alldata.com has info on this but it's a paid service. Anyone know of any
FREE sites that list all the recalls and TSB's?

Thanks again,

Phil


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Old 10-17-2005, 22:01   #9 (permalink)
aarcuda69062
Guest
 
Posts: n/a
Re: 96 Taurus Overheating

In article <hhZ4f.1134$Hs.970@tornado.socal.rr.com>,
"Shoe Salesman" <someone@microsoft.com> wrote:

> "Tom Adkins" <newton5@remove.comcast.net> wrote in message
> news:aJmdnQN33MQaz8neRVn-tA@comcast.com...
> > Shoe Salesman wrote:
> >> "Backyard Mechanic" <pettyfog@yaywho.com> wrote in message
> >> news:Xns96F2B63EE6D64pettyfogery@207.115.63.158...
> >>
> >>>95% certainty: Water pump
> >>>
> >>>Wait till you see what it looks like when you remove it!
> >>>
> >>
> >> OK, I've had a good amount of experience with Taurus's and have never
> >> seen a water pump just quit for no reason...You've got to clue us in on
> >> what you think it is....

> > 3.0L Tauri of that era suffered from water pump impeller erosion. There
> > are probably no fins on the water pump impeller left to move the water.
> > Unless flushed recently, I'll bet the coolasnt is brown also.

>
> Oh that's why I haven't seen it. My experience has been with cars that were
> taken care of.....


That's because the stuff you work on has your name on the title,
the rest of us have to deal with what's out in the real world.

> Oh well, the bearing is probably ready to let go anyway.
> It sure won't hurt it to put a water pump on it even if the impeller is
> good.


It [the impeller] won't be.
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Old 10-18-2005, 04:01   #10 (permalink)
Tom Adkins
Guest
 
Posts: n/a
Re: 96 Taurus Overheating

Shoe Salesman wrote:

>
>
> Oh that's why I haven't seen it. My experience has been with cars that were
> taken care of..... Oh well, the bearing is probably ready to let go anyway.
> It sure won't hurt it to put a water pump on it even if the impeller is
> good.
>
>


It wasn't just on poorly maintained cars. It was a combination of aeration at the
impeller, casting sand in the block, and something with water flow. There was a
slightly effective recall to flush the cooling system with some nasty chemicals and
rerouting some heater\transfer hoses on the rear of the motor. Do a search for "Ford
Brown Coolant Recall" for details. I've seen the impeller go at as low as 20K miles.
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