i have the 5 cyl and replaced temp sensor and thermostat and was wonderin what peoples gauges are at, Mine seems to be right around the middle mark, And how far up til it turns fan on?

 

my old baby stayed at the half way point "which is normal" then in traffic jams it went up to 3/4 mark before fans cut in, as long as the fans cut in and cools the engine it ok

 

on that note, is there a alternative/upgraded version of that gauge. I probably/did burned my gauge by apliing 12V to it. germans made wierd gauge, it works by heat, as higher temprerature of the engine the higher voltage higher heat inside more the metal is bending more arrow is bending.
I ask gauge based on magnatics, not heat.

 

its called a wax stat nothing to do with magnetics

 

there are many types of gauges, that are powered by haet, or magnetics, or pressure.
temp gauge is powered by heat. I want a guage to be direct replacement for it and be powered by magnetism.

 

Mechanical gauges are powered by heat as the fluid heats up it expends forces up the tube and exerts pressure on the bourbon tube moving the needle. Electrical gauges typically use moving coil or D'Arsonval movement, signal comes from either PTC or NTC resistive sensor. Primitive cheap electrical systems had wire wound around a bimetal strip and thermoresistor in series.

 

so, thats a no on alternative gauge.

 

I think the only mechanical guages you guys have ever seen are oil pressure guage, They actually did have a capillary tube, fitting screwed into the block, and true pressure sent to the Bourdon Tube Oil Pressure guage.

As to the temp guage, I think, though I am not sure, they have always been resistive, ie, beeswax in the sender, and differential resistance to make the guage read per the sender, either moving coil or moving magnet.

Mechanical, as per actual "electrical" guages as Kakarot wants, I do not think exist.

Cheers,

George

 

Once upon a time mechanical temp gauges were popular because they were the only ones offering 270° sweep as opposed to the 90° offered by the electric. This gave easier and more precise readings. The mechanical gauges are also more rugged. Installing an aftermarket temperature gauge sucks! The gauge comes with about six feet of soft copper tube with a fairly large sensor permanently attached. You can’t cut the excess tubing and you have to be careful that you don't kink or squeeze the capillary tube. You also can’t make 90° bends in the tubing making routing a problem. In areas where there is vibration you have to coil the tube so it acts as a spring. AutoMeter and VDO still make mechanical gauges for those that want them.

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you mis understood me.
I want a sensor same base as a speddo sensor, or tach. they work: if more electricity is aplied more magnatic field is made on the arrow, which then attracts to other magnate around it. the oposite force is made by a spring attached to the arrow and to the base.
but the stock temp gauge works diferently: when more power is applied, more heat is generated by the coil. the coil is around some metal strip, which bends under the heat, and moving the arrow.
I dont trust it becouse, when the AC is on it creates cold around the sensor (behind teh cluster there goes a air duckt) making the reading smaller, while during winter it makes reading bigger. and also the reaction time for the sensor is very little.

any way, the temp gauge works, but it looks like wrong reading. during '90C' the bottom hose was warm, oppose of being hot previously.