re: 164: Excessive Coolant Temperature Light ON

[Carl Prochilo <Carl_Prochilo@domain.elided>]

David,

I am experiencing a similar problem.  The light was on for me even when
the car was cold, which indicated an open condition on the switch.  On
my 3.0l 164, the temperature sending unit is attached to the t-stat
housing on your drivers side where the upper coolant hose connects.  The
unit has two wires attached, one for the gauge and one for the idiot
light.  I've heard of the unit going bad, but I'm attempting to salvage
mine hoping the electrical connection is at fault.  I've applied some
stabilant 22 to see if, in the long run, it will make a difference.

Cheers,
Carl Prochilo
1991 164

David Hanley wrote:
> The high coolant temperature light comes on after about 5 minutes and
> generally stays on even though the engine temperature sits a steady 75
> degrees C, with no steam and the engine fans does not cut in.
> 
> Coolant level is okay.
> 
> Any ideas ? 
> Coolant Sensor is kaput ?
> Rain (its raining a lot in England currently) is getting to the connections?
> 
> I assume the coolant temperature sensor goes into the top of the coolant
> expansion tank ?
> 
> I have to do 50 miles on Tuesday, so can somebody get back to me on Monday ?
> 
> Regards
> David Hanley
> '94 164 TS

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