• Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech

Am i running to Cool?

  • Thread starter Thread starter jimmmy
  • Start date Start date Feb 6, 2006
J

jimmmy

New Member
Feb 5, 2006
6
0
0
Feb 6, 2006
#1
  • Feb 6, 2006
  • #1
i have a 195* t-stat that i tested and it works fine. I noticed that my stock gauge shows only 1/3 way up so i am wondering if i'm running to cool. I can hold my hand on the upper rad hose with out burning myself. I put a probe in the radiator and it only reads 135*. The stock gauges suck, but i'm just wondering if i should be able to hold the upper rad hose?
 

mbsprinks281

Member
Apr 19, 2005
58
2
9
Lockport, IL
Feb 6, 2006
#2
  • Feb 6, 2006
  • #2
The stock water gauge is always off. You are fine. Dont think Id worry about it.
 

88Stangboy

Banned
Dec 12, 2005
342
0
0
Greenville, SC
Feb 6, 2006
#3
  • Feb 6, 2006
  • #3
Is there even a problem with running to cool? I'd rather run a little cool than over heat all the time?
Whats the down sides to running cool?

If you are overheating, about what temp should you start pulling over and cutting your car off?
 
J

jimmmy

New Member
Feb 5, 2006
6
0
0
Feb 6, 2006
#4
  • Feb 6, 2006
  • #4
Running cool cuases engine wear and poor gas mileage. I'm also running a flex-a-lite fan too.
 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0
Nov 19, 2005
815
5
18
mooresville, nc
Feb 6, 2006
#5
  • Feb 6, 2006
  • #5
running cool will wear out bearings and cylinder walls quicker and cause the oil the sludge over time. just think if the motor never gets hot the condensation that gets in your oil never has a chance to evaporate. just learned about that stuff today at NTI
 

Strype

Cuthbert catcher
Founding Member
May 11, 1999
61
34
104
Huntsvegas, AL
Feb 6, 2006
#6
  • Feb 6, 2006
  • #6
I run about the same temp -no problems as of yet. Be glad it's not the opposite problem, my old 86GT dran 230 degrees and I sold it!!!
 

onefstsnake

New Member
Nov 25, 2005
792
1
0
Northern VA
Feb 6, 2006
#7
  • Feb 6, 2006
  • #7
so whats an optimal temp?

My AutoMeter gauge reads right around 195-200*
 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0
Nov 19, 2005
815
5
18
mooresville, nc
Feb 6, 2006
#8
  • Feb 6, 2006
  • #8
onefstsnake said:
so whats an optimal temp?

My AutoMeter gauge reads right around 195-200*
Click to expand...

thats fine. as far as running cooler...its good if you need the extra protection from detonation. people running power adders use lower tstats so that they dont have to worry about detonation as much. the thermostat and cooling system was designed to keep the car in a desired operating temperature range, not keep it from overheating. so if the car has a problem with overheating, putting a lower tstat might help but its just a bandaid fix
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Feb 6, 2006
#9
  • Feb 6, 2006
  • #9
The optimal water temps for performance vs engine efficiency are very different. Also, compared to carbed stuff, these cars run warm in almost any state of tune, so I wouldnt worry about the increased wear issues too much (non-puter controlled carbed stuff can run super cool and super rich, or with stoichiometry all over the board across the entire range, and it still holds up alright).

FWIW, my stock temp gauge reads ~35*F too cool (all cars seem to be different too. ).

Simply stated, the stat is regulating temps. The stat opens/closes around its rating and the gauge sender, being in a different location than the stat, can indicate a higher or lower (generally lower) operating temp.
 
J

jimmmy

New Member
Feb 5, 2006
6
0
0
Feb 6, 2006
#10
  • Feb 6, 2006
  • #10
So should i be able to hold the upper radiator hose with my hand? Its hot, but not hot enought for me to let go.
 

dragnazz5.0

My "0" key d0esn't w0rk, s0 I have t0 use the zer0
Nov 19, 2005
815
5
18
mooresville, nc
Feb 6, 2006
#11
  • Feb 6, 2006
  • #11
HISSIN50 said:
The optimal water temps for performance vs engine efficiency are very different. Also, compared to carbed stuff, these cars run warm in almost any state of tune, so I wouldnt worry about the increased wear issues too much (non-puter controlled carbed stuff can run super cool and super rich, or with stoichiometry all over the board across the entire range, and it still holds up alright).

FWIW, my stock temp gauge reads ~35*F too cool (all cars seem to be different too. ).

Simply stated, the stat is regulating temps. The stat opens/closes around its rating and the gauge sender, being in a different location than the stat, can indicate a higher or lower (generally lower) operating temp.
Click to expand...

yeah, i didnt think too much about older cars. they can run a lot cooler than newer cars.
 

onefstsnake

New Member
Nov 25, 2005
792
1
0
Northern VA
Feb 6, 2006
#12
  • Feb 6, 2006
  • #12
Well I just put a new radiator, Tstat and hoses on. So I figured I would ask.

I put a 195* TStat on so I guess 200* aint bad.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Feb 7, 2006
#13
  • Feb 7, 2006
  • #13
onefstsnake said:
Well I just put a new radiator, Tstat and hoses on. So I figured I would ask.

I put a 195* TStat on so I guess 200* aint bad.
Click to expand...
Sounds alright to me. You could have some residual air trapped, etc, that is still purging (that can elevate temps a little).
The parts store stats are known for not opening when they should (esp at high RPM's, like Auto X'ing) which is where a balanced stat really helps out.

I wouldnt worry. Enjoy and good luck with the other fixes you are doing.
 

onefstsnake

New Member
Nov 25, 2005
792
1
0
Northern VA
Feb 7, 2006
#14
  • Feb 7, 2006
  • #14
Being that the average temp here in Northern VA this time of year is 40* and below, will my engine temp get alot hotter during the summer when its 90*+?

As for the other fixes, everything is going great. Just wish I had some more $$ to fix a few other issues.
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Feb 7, 2006
#15
  • Feb 7, 2006
  • #15
onefstsnake said:
Being that the average temp here in Northern VA this time of year is 40* and below, will my engine temp get alot hotter during the summer when its 90*+?

As for the other fixes, everything is going great. Just wish I had some more $$ to fix a few other issues.
Click to expand...
WIth a 195*F stat, it is hard to run below that once the motor is up to temp.

As far as summer goes, it will largely depend upon how well the coil can reject heat. If running a little warm, a 180 stat in the summer can help.

Glad to hear the other stuff is comin along.
 

onefstsnake

New Member
Nov 25, 2005
792
1
0
Northern VA
Feb 7, 2006
#16
  • Feb 7, 2006
  • #16
The coil? as in the ignition coil or the spring in the Tstat?

You wouldnt happen to have a spare aluminum driveshaft? lol
 

HISSIN50

"How long does it take to get help in here?
15 Year Member
Nov 29, 1999
31,179
33
129
Feb 7, 2006
#17
  • Feb 7, 2006
  • #17
onefstsnake said:
The coil? as in the ignition coil or the spring in the Tstat?
Click to expand...
The radiator.
 

vristang

15 Year Member
Mar 31, 2005
4,933
101
124
Seattle
Feb 7, 2006
#18
  • Feb 7, 2006
  • #18
onefstsnake said:
Well I just put a new radiator, Tstat and hoses on. So I figured I would ask.

I put a 195* TStat on so I guess 200* aint bad.
Click to expand...

Those are exactly the temps I am running now.

I do not plan on changing the stat in the summer. If anything I will be upgrading to an e- fan, or switching back to a 3-core Cu radiator.
Basically the cooling system components should be able to maintain the temp of the T-stat, if not then there is an issue that needs to be addressed.

My thoughts
jason
 
You must log in or register to reply here.

Similar threads

Engine Which cooling part first?
  • Dontknowchit
  • May 8, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
35
Views
1K
Fox 5.0 Mustang Tech May 15, 2025
90trunk
Engine 87 NA - Tune or no Tune needed?
  • R82148V
  • Sep 17, 2025
  • Fox 5.0 Mustang Tech
Replies
8
Views
338
Fox 5.0 Mustang Tech Sep 17, 2025
R82148V
S
Fuel ‘88 GT Runs Rich Cold — Fixes Itself When I Unplug Sensors (ECT, MAF, O2, etc.)
  • Sufarry
  • Nov 6, 2025
  • Fox 5.0 Mustang Tech
Replies
12
Views
790
Fox 5.0 Mustang Tech Nov 9, 2025
Mustang5L5
R
Engine Fox body doesn’t run hot until I start driving
  • Rose5oh
  • Mar 17, 2025
  • Fox 5.0 Mustang Tech
  • 2
Replies
20
Views
1K
Fox 5.0 Mustang Tech Jun 7, 2025
limp
W
High Cylinder Head Temp - Not Overheating?
  • wtfwork12
  • Jun 26, 2025
  • 2005 - 2014 S-197 Mustang -General/Talk-
Replies
9
Views
2K
2005 - 2014 S-197 Mustang -General/Talk- Jul 1, 2025
wtfwork12
W
Share:
Bluesky Email Share Link
  • Mustang Forums
  • 1979 - 1995 (Fox, SN95.0, & 2.3L) -General/Talk-
  • Fox 5.0 Mustang Tech
Menu
Log in

Register

  • Forums
  • What's new
  • Media
  • Resources
  • Contact
  • Sponsor
X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?

X

Privacy & Transparency

We use cookies and similar technologies for the following purposes:

  • Personalized ads and content
  • Content measurement and audience insights

Do you accept cookies and these technologies?