8 replies to this topic

[Tom Cooper]

Cannot get my temp gauge to move past the "c" cold setting. I have changed the sender unit, and tried grounding the lead on the sender which caused the needle to flip straight to "H". Has anyone had this problem ? Would a faulty or open thermostat
Be an issue ? Hav'nt checked that yet.

[RustyAutoCityE]

As you run the engine for 10 minutes or so, keep checking the radiator top hose to see if the thermostat is working correctly. If it is, the hose should stay cool as then engine warms up, then start to get hotter as the thermostat opens. If it stays cool, the thermostat may be stuck open.

 

Is it a new gauge?

Edited by RustyAutoCityE, 15 May 2020 - 12:52 PM.

[gazza82]

Does the sender match the gauge?

 

A multi-meter on the sender should send signals as the water heats up .. I'm sure there is something on google that explains it

 

Also check the sender wire is not broken or a poor connection ..

Edited by gazza82, 15 May 2020 - 10:36 AM.

[Cooperman]

The temp gauge on my S was so inaccurate that I fitted a capilliary-type gauge as sold by Mini Spares.
It actually gives the temp accurately in degs C. A good investment.

[Tornado99]

Cannot get my temp gauge to move past the "c" cold setting. I have changed the sender unit, and tried grounding the lead on the sender which caused the needle to flip straight to "H". Has anyone had this problem ? Would a faulty or open thermostat
Be an issue ? Hav'nt checked that yet.

 

Any solution to this? My 1988 restored car is doing similar. 

[andyapanel]

I used to have to tap the Temp gauge on my first RSP to get it off zero.

[sonscar]

Somewhere there will be a resistance/temp curve published for the sender.You could measure this as the motor warms up or put a suitable resistor on the end of the gauge wire and earth the other end.This will show you where the reading should be.The gauges are not precision instruments and most are old so the calibration could be out.The senders may be ranged differently.You may have fitted it with PTFE tape which could insulate it,etc etc.Have fun,Steve..

[beardylondon]

I did the exactly the same, haven't looked back!

 

The temp gauge on my S was so inaccurate that I fitted a capilliary-type gauge as sold by Mini Spares.
It actually gives the temp accurately in degs C. A good investment.

[Spider]

I'd suggest first off, check what the actual temp of the engine & coolant is with a reliable means of checking. You can use an IR Temp Gun, it won't be spot on accurate, but you should be able to get results to within 5⁰, then you'll have a better idea what you're playing with and if it's an instrumentation issue or something else.

 

Somewhere there will be a resistance/temp curve published for the sender.You could measure this as the motor warms up or put a suitable resistor on the end of the gauge wire and earth the other end.This will show you where the reading should be.The gauges are not precision instruments and most are old so the calibration could be out.The senders may be ranged differently.You may have fitted it with PTFE tape which could insulate it,etc etc.Have fun,Steve..

 

Not actually published curves, but there's some info here (though a little conflicting - I'm not sure how far apart these all all)

 

http://www.theminifo...p-sender-specs/