car running at 140degress?

3

331 stang91

Member

Oct 16, 2004

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wisconsin

May 21, 2005

#1

• May 21, 2005

• #1

So i drove around the other day for about 2 hours with the car running about 180. The for no reason the needle on the gauge (auto meter mechanical) got berried. So I thought maybe the thermostat got stuck open. So I put in a 180 and the thing still runs at about 141 or so . Any ideas on why that could be?
Thanks for the help

 

stangbear427

Active Member

Nov 11, 2002

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New England

May 21, 2005

#2

• May 21, 2005

• #2

You may have a bad sender, or a kink in the line. My mechanical H2O temp started acting funny awhile back, and they told me to pull it out and make sure the light plug in back was in strait. Don't see how it could matter, but it works fine ever since. Call Autometer.

 

3

331 stang91

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Oct 16, 2004

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May 21, 2005

#3

• May 21, 2005

• #3

Thanks I'll try it

 

04sleeper

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Jun 22, 2002

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89

Dallas, TX

May 21, 2005

#4

• May 21, 2005

• #4

Also be sure there is no air in your system. If the mechanical gauge's sensor has air around it, it will not read properly.
Try this.

Unscrew the sending unit out of the intake, then use a dropper or turkey baster and fill it up with radiator fluid to make sure there is no air under it. Then screw it back in.

 

Killer50stang

New Member

May 11, 2004

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May 21, 2005

#5

• May 21, 2005

• #5

331 stang91 said:

So i drove around the other day for about 2 hours with the car running about 180. The for no reason the needle on the gauge (auto meter mechanical) got berried. So I thought maybe the thermostat got stuck open. So I put in a 180 and the thing still runs at about 141 or so . Any ideas on why that could be?
Thanks for the help

Click to expand...

Stock? I'd go with autometer if so, the stock ones never work correctly.

 

3

331 stang91

Member

Oct 16, 2004

261

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wisconsin

May 21, 2005

#6

• May 21, 2005

• #6

No its an autometer like I stated above thanks for the suggestions

 

stangbear427

Active Member

Nov 11, 2002

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New England

May 21, 2005

#7

• May 21, 2005

• #7

89sleeper said:

Also be sure there is no air in your system. If the mechanical gauge's sensor has air around it, it will not read properly.

Click to expand...

Ditto that. I'm a little pissed that I didn't mention it, as I had that happen too. Turned out to be a radiator leak- my Autometer was really going nuts although it was reading way hotter than normal, not cooler. The air pockets get wicked hot even though the coolant isn't, so every few minutes it would spike at like 250* then settle back down to 180*. So yeah- what sleeper said too. Air in the system is never a good thing anyway.

 

HISSIN50

"How long does it take to get help in here?

15 Year Member

Nov 29, 1999

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May 21, 2005

#8

• May 21, 2005

• #8

also be sure the sender is grounded properly. excessive use of teflon tape etc can diminish the ground of the sender to lower intake, which in turn diminishes the readings. one can use duct tape to tape a ground wire to the sender body as a quick check. good luck.