How to check thermostat - Team Camaro Tech
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post #1 of 11 (permalink) Old Oct 2nd, 01, 12:24 PM Thread Starter
 
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How do you check your thermostat, while running hot, I checked both hoses, they both felt full and hot. Should the top hose feel empty or full of coolant. My car was running hot before, put a clutch fan to replace the flex, and it worked, car ran completly cool even while idling for a long time, but just the other day, It was real hot2 about mid 90s and it started to run about 210, when i started driving it only went down a little. Then drove it again next day (wasn't so hot) and it was real cool again.
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post #2 of 11 (permalink) Old Oct 2nd, 01, 04:05 PM
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John
 
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you can pull the thermostat and pop it in the oven to see if it is opening properly.
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post #3 of 11 (permalink) Old Oct 2nd, 01, 06:06 PM
SSuperman
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Oven!...try BOILING water with a temp gauge in the water drop the thermostat in and see what temp. it opens up at.
 
post #4 of 11 (permalink) Old Oct 2nd, 01, 06:56 PM Thread Starter
 
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I figured out a different way, checked upper hose while cold and running felt empty because thermstat wasn't open, felt it when hot, hose felt full because therm. was now open all the way, I guess my stat was working when it was running hot. I have a 16 inch summit elec. fan, it stopped working a little while ago, gonna try to get it fixed, so i can put it on the front of the radiator with toggle switch for those hot days. anyone in the bay area know a place that can fix an electric motor on a fan?
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post #5 of 11 (permalink) Old Oct 2nd, 01, 07:14 PM
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T-Stat could be opening to late/at a higher temp than what its rated for or it might be sticking occasionaly, only cost 5 bucks to try.
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post #6 of 11 (permalink) Old Oct 3rd, 01, 02:14 PM
xodus921
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<BLOCKQUOTE>quote:</font><HR>Originally posted by SSuperman:
Oven!...try BOILING water with a temp gauge in the water drop the thermostat in and see what temp. it opens up at.<HR></BLOCKQUOTE>

I thought water only boiled at one temp? After that it evaporates, so it shouldn't get any hotter then 212 degrees. Why would you need a temp gauge? 212 degrees is boiling point right?


------------------
Tony
<UL TYPE=SQUARE>
<LI>1979 Z-28, 350- Edelbrock Performer RPM Package- TH350
<LI>1970 Cadillac Hearse - 472 BB automatic 375hp
<LI>2000 Gmc Sonoma - 5-speed 4.10 rear[/list]
[This message has been edited by xodus921 (edited 10-04-2001).]
post #7 of 11 (permalink) Old Oct 3rd, 01, 03:34 PM
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Actually, boiling point of water is 212F. I had overheating problems with my 67 and fould an optical pyrometer to be a very valuable tool. It allows you to just 'point and shoot' to get the temperature of anything.
Good Luck -- E-mail me amd I can give you specifics of my temperature readers.
Cheers,
JJH
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post #8 of 11 (permalink) Old Oct 4th, 01, 04:07 AM
xodus921
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Thanks for clearing that up jim

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Tony
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<LI>1979 Z-28, 350- Edelbrock Performer RPM Package- TH350
<LI>1970 Cadillac Hearse - 472 BB automatic 375hp
<LI>2000 Gmc Sonoma - 5-speed 4.10 rear[/list]
post #9 of 11 (permalink) Old Oct 4th, 01, 06:12 AM
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xodus, I think he was saying to put the thermostat into a pot of water with a thermometer and bring the pot to a boil to see when the thermostat opens! Obviously, if it hasn't opened by the time the water starts to boil it's not going to open (at least not below 212).

Dan
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post #10 of 11 (permalink) Old Oct 4th, 01, 08:35 AM
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The temp at which water boils is affected by atmospheric pressure.
At the summit of a 14000 ft. mountain, it would boil at a much lower temp than at sea level.
This is the reason radiators have caps that control pressure.

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Don~ ZZ430DropTop
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post #11 of 11 (permalink) Old Oct 4th, 01, 03:43 PM
SSuperman
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Thanks danhei for clearing it up...next time I'll try typing in English...
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