Where does your water temperature gauge read?
#1389756
02/18/13 02:41 PM
02/18/13 02:41 PM
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Joined: Jan 2013
Posts: 77 Louisiana
rnch
OP
member
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OP
member
Joined: Jan 2013
Posts: 77
Louisiana
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I wonder if mine is reading low? Perhaps the 120K, 27 year old sending unit is out of tolerance? With all new hoses, new 180 degree thermostat, new pressure cap and properly functioning fan clutch, when at it's operating temperature my gauge needle rises to the first mark past the "C" end. Is this about right?
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Re: Where does your water temperature gauge read?
[Re: rnch]
#1389757
02/18/13 03:18 PM
02/18/13 03:18 PM
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Joined: Oct 2005
Posts: 1,305 Lakewood, Colorado
herkamer
pro stock
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pro stock
Joined: Oct 2005
Posts: 1,305
Lakewood, Colorado
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Sounds right. In the 83 with the water temp at 195 which is verified by the laptop and sender for the EFI, it sits about 2 ticks under half. 15 degrees less would put it barely in the operating range.
Matt 69 Dart Swinger 340 83 W350, Megasquirted with 46RH Old news: 72 Demon street/race mobile Latest: 70 Duster backhalf car and even more
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Re: Where does your water temperature gauge read?
[Re: 76dodgeboy]
#1389759
02/18/13 04:31 PM
02/18/13 04:31 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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My shorty runs at the 1/4 mark. Originally with the /6 it ran at the 1/2 mark.
I am truckless..
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Re: Where does your water temperature gauge read?
[Re: rnch]
#1389761
02/18/13 04:54 PM
02/18/13 04:54 PM
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Joined: May 2003
Posts: 15,487 Florida
scratchnfotraction
I Live Here
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I Live Here
Joined: May 2003
Posts: 15,487
Florida
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stock guages are at best a guess anyway. all of my mopars have had gauges way on the low side after the have a few yrs on them. install a good mech guage and then you can compair each other to keep in check if you starts to read different so should the other. thats how I use my gauges in the 440 truck. stock and a mech set and watch both for movements.
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Re: Where does your water temperature gauge read?
[Re: rnch]
#1389764
02/19/13 10:42 AM
02/19/13 10:42 AM
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Joined: Aug 2004
Posts: 8,087 Elk Grove, Calif.
bigblock340power
master
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master
Joined: Aug 2004
Posts: 8,087
Elk Grove, Calif.
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Quote:
Here's a pic of where my temp gauge is at normally.
Either buy, or find someone with an Infrared Non-contact Thermometer W/Laser pointer. They're fairly cheap, and easy to use. Instant readings where ever you point it. Takes the guess work out of what that old engine is up to! I looked them up on E bay. They start at around 13.00 bucks and up.
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Re: Where does your water temperature gauge read?
[Re: scratchnfotraction]
#1389767
02/20/13 11:19 PM
02/20/13 11:19 PM
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Joined: Aug 2003
Posts: 12,291 Kent, Wa
340SHORTY
Truck Nut
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Truck Nut
Joined: Aug 2003
Posts: 12,291
Kent, Wa
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No way to get ice water to read 32 F because its not 32 F, If it was it would be solid ice. I would also agree with the boiling water, its sensing the pot and not the water..
I am truckless..
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Re: Where does your water temperature gauge read?
[Re: 340SHORTY]
#1389769
02/21/13 10:23 AM
02/21/13 10:23 AM
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Joined: Jan 2006
Posts: 8,162 USA
360view
Moparts resident spammer
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Moparts resident spammer
Joined: Jan 2006
Posts: 8,162
USA
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Stirred distilled water with ice in it is about 32 with a slight correction for air pressure. The stirring is necessary and important. Infrared radiation emits from the top of the water surface, not from the metal pot bottom beneath it, but you want to aim away from the sides of the pot. Infrared does not get absorbed or pass clearly thru the same materials that visible light does. ( this is actually the root argument about global warming, CO2, sunlight, earths water vapor, clouds, ice) Boiling distilled water is in the 210 to 212 F degrees range depending on air pressure. http://www.csgnetwork.com/h2oboilcalc.htmlI would be happy with an IR gun that would read within a few degrees of correct. But ten to twenty degrees off is too much. I have been using Type K thermocouples that have to touch the object but can withstand 1700 F without damage. I like the old $30 Sears ones with the 18 inch long stainless steel probe and yellow handles meant for gas furnace work, but they dont stock them in the hardware section anymore, having replaced them with a less useful pipe clamp style. You can slip the tiny 1/8th diameter wire probe Type K thermocouples underneath the radiator hose and under the clamp with no leak in my experience
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Re: Where does your water temperature gauge read?
[Re: bigblock340power]
#1389770
02/21/13 04:55 PM
02/21/13 04:55 PM
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Joined: Jan 2013
Posts: 77 Louisiana
rnch
OP
member
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OP
member
Joined: Jan 2013
Posts: 77
Louisiana
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Quote:
Quote:
Here's a pic of where my temp gauge is at normally.
Either buy, or find someone with an Infrared Non-contact Thermometer W/Laser pointer. They're fairly cheap, and easy to use. Instant readings where ever you point it. Takes the guess work out of what that old engine is up to! I looked them up on E bay. They start at around 13.00 bucks and up.
Thanks for the suggestion, BB! I snagged one off Evilbay for $ 13.30 including shipping.
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Re: Where does your water temperature gauge read?
[Re: ahy]
#1389772
02/23/13 03:52 AM
02/23/13 03:52 AM
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Joined: Oct 2007
Posts: 3,888 Oregon
hooziewhatsit
master
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master
Joined: Oct 2007
Posts: 3,888
Oregon
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My aftermarket Equus electric gauge reads about 15* high at the 200* range. One of these days I'll figure out the resistor I need to add in series to make it accurate at running temp. I eventually had to verify with a candy thermometer in the radiator neck (once the thermostat opened). This was also after I characterized two other temperature sensors, and they read the same as the candy thermo.
If you ever find yourself in a fair fight, your tactics suck.
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Re: Where does your water temperature gauge read?
[Re: rnch]
#1389773
02/24/13 11:40 AM
02/24/13 11:40 AM
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Joined: Dec 2007
Posts: 1,357 central Florida
VL21
pro stock
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pro stock
Joined: Dec 2007
Posts: 1,357
central Florida
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Counting from the "C", my '85 runs just before the 4th line, not sure what that is in degrees.
It takes gasoline to interest me.
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