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Author Topic:   temp gauge
cobb
Dirt Maniac

Total posts: 131
posted June 19, 2005 05:11 PM  
Any of yall ever had a bad temp gauge? My gauge slowly creeps up but the light never kicks on(light should come on a 235). The gauge got up to 245 last night before i came in, but I don't think the motor was that hot.

eenfield
Dirt Maniac

Total posts: 116
posted June 19, 2005 06:11 PM  
Once I built an engine, and come time to get it running, the gauge would read 220. WTF? I asked myslf. The car came back and I put in a high capacity rad, high flow 160* replaced the 195* t-stat, a mechanical fan (to replace the electric one), good shroud, and lastly a new air dam under the car... Car ran a rock solid 190. Alright! I took my infared pyrometer, and measured the t-stat housing...159*-161*. Time to throw that gauge/sender away! It was a Autogauge unit by Autometer.

[This message has been edited by eenfield (edited June 19, 2005).]

hobby39
Dirt Maniac

Total posts: 112
posted June 20, 2005 07:48 AM  
I just had the same problem the other night it was really hot out still in the high 80's to low 90's when we started racing the gauge said 240 when I took the checker hit the cool down bar and it imediately cooled down on another night it was right at 230 I have a 230 warning light that never came on the first night and just started to flicker at 240 is there a way to test the gauge and the sending unit for the warning light? if you use a infared pyrometer is there going to be a difference between the water temp and the metal on the T-stat housing?

eenfield
Dirt Maniac

Total posts: 116
posted June 20, 2005 01:36 PM  
shouldnt be more then a couple degrees, if you find a bare spot in the direct vicinity of the thermostat.

goinrcn44h
Dirt Freak

Total posts: 205
posted June 20, 2005 04:33 PM  
water boils at 212 +/- a few.... boil water and set the unit in and see where it goes to... should be close to that ... thats just the common sense answer... I suppose I could be way outa whack though too..
44H

cobb
Dirt Maniac

Total posts: 131
posted June 20, 2005 07:27 PM  
well i started the car with a thermometer in the filler and let it run for a few minutes to get hot. gauge read 210 thermometer said 150.....i'd say bad gauge.

hobby39
Dirt Maniac

Total posts: 112
posted June 20, 2005 09:35 PM  
I'm borrowing a infared pyrometer for friday and were going to check the thermostat housing after the heat and feature to check the gauge. the radiator lost zero water so I really don't think it got as hot as the gauge said but we'll find out.

sc1 racing
Dirt Freak

Total posts: 419
posted June 20, 2005 11:30 PM  
another thing to do is test your dummy light every weekend before the races. all you have to do is pull wire off of sensor and ground it if its working right light should come on

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