Adjusting My Temp Guage
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
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From: Valley Center, CA
Alright, I am making progress. Everything that you guys are saying is right except for the actual temp at the thermostat housing. It is actually right on at 178* with the engine fully warmed up.
By adding resisters to the circuit, the gauge actually reads higher.
I have bought a potentiometer rated from 0-25 ohms. My next step is to install it between ground and the connection point and adjust for accuracy. Right straight up the middle would be great. 
Thanks for sharing, Jag
By adding resisters to the circuit, the gauge actually reads higher.
I have bought a potentiometer rated from 0-25 ohms. My next step is to install it between ground and the connection point and adjust for accuracy. Right straight up the middle would be great. Thanks for sharing, Jag
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
Success! With the original gauge wire connected on the sensor, I ran the supplimental line to the sensor connection point. At 80 ohms of resistance between the sensor and direct ground the gauge reads straight up in the middle. Thanks for the help everyone. Jag (L)
Thanks for the help everyone. Jag (L)
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Logistics Pro
Joined: Oct 2002
Posts: 4,489
Likes: 5
From: Valley Center, CA
I don't know about the cold and medium range because once that Y-block got up to temp I would have been out there to midnight waiting for it to cool off. I'll try it again tonight and watch the gauge as the engine warms up. Jag
Jag
Freshman User
Joined: Apr 2003
Posts: 27
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From: North Alabama
My biggest concern would be to make sure it reads correctly when the engine overheats. It may never get over to hot now. Disconnect the sensor on the block, turn on the key and make sure the meter will stay at Hot. That still is not a positive indication that it will work at the high end as I don't know what the duty cycle of the sensor is at overheat temps. I suppose you could purposely block the airflow and monitor the temp and see what the gauge reads when the water temp is around 200* to make sure it is still accurate on the upper end (which is where I fear you may have problems with it not reading high enough) It will read cold now with no problem.
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hbronco
Cooling, Heating, Ventilation & A/C
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Feb 15, 2004 12:37 AM
