Engine Coolant Temperature Gauge question

[iain.atkinson at tesco.net]

if you have vag com then i am pretty sure that gives a coolant temp readout

iain
---- thejimrose <thejimrose at gmail.com> wrote: 
> >
> > Question 1:
> > Should the thermostat keep the coolant temperature relatively constant?
> > Even
> > at low temps and highway driving?
> >
> 
> yup. mine  is always  rock steady  on the 1/2way mark on the gauge. from 110
> in sonoma to 15 in tahoe.
> 
> Question 2:
> > What is the usual position of the needle when driving?
> 
> 
> 1/2 way on the gauge.
> 
> And what is the
> > position of the gauge when the radiator fan kicks in?
> 
> 
> no change on mine.
> 
> Question 3:
> > I think the dots for positions 1 and 7 are calibration test marks. If I
> > remember correctly, the Bentley shows usage of a "Special Tool" to test
> > the
> > gauge. More than likely the tool is just a rheostat. Does anyone know the
> > resistance values at the two test positions?
> > Answer: not me.
> 
> 
> me neither.
> 
> Question 4:
> > Does anyone have a simple method of measuring the coolant temperature with
> > an external thermometer?
> 
> 
> laser thermometer  hitting the engine /  radiator at various points? but
> agreed, the temp sensor is the right place, coming out of the block.
> 
> >
> > Answer: You need to read temp of coolant inside the engine or 'read'  the
> > temp sender.
> >
> > Conclusion: Get a new thermostat. Didn't we just do this one?
> 
> 
> +1. might wanna flush the coolant, change the temp sender too while you're
> in there.
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