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[JoeRadosavljevich]

Hello people!

I followed Andy's advice on checking a temperature gauge by earthing it to the chassis and it does go all the way to the hot, BUT, when the engine's running it stays there, it won't come down, i.e. start showing correct coolant temperature. Where to look for, any thoughts?

[JoeRadosavljevich]

I need some help, please.

[symes]

Hello people!

I followed Andy's advice on checking a temperature gauge by earthing it to the chassis and it does go all the way to the hot, BUT, when the engine's running it stays there, it won't come down, i.e. start showing correct coolant temperature. Where to look for, any thoughts?

I would fit a new one IMHO

[symes]

The little sender unit-It has one wire on it

[JoeRadosavljevich]

The temp sender itself has a strange connector on its end so I had trouble connecting single wire with a spade connector onto the temp sender. It just doesn't fit. If the temp sender is faulty should it make a gauge needle go all the way up?

[symes]

spade connector slides onto top of unit mate-simple really and can cause your problem

[JoeRadosavljevich]

Seeing that, strangely, you're the only one trying to help me, I have to ask you one more thing.

Why does the temp gauge, when connected to the temp sender stays all the way to the red zone and won't settle down and show the correct engine coolant temperature?

[Abiton]

This is how the connector fits on:



That isn't the actual connector, but it's the same style.

If the sender has leaked so that coolant has got inside it, I could see that being the same as grounding the wire that goes to it, and causing the gauge to max out.

[JoeRadosavljevich]

It's the blue thing on top of it that confuses me, since it doesn't exist on the sender in my car.

So, Abiton, correct me if I am wrong, but what you're saying is that I have to get a new temp sender?

[symes]

It's the blue thing on top of it that confuses me, since it doesn't exist on the sender in my car.

So, Abiton, correct me if I am wrong, but what you're saying is that I have to get a new temp sender?

you must have wire on yop-if its not on there find+ fit mate

[Abiton]

The blue thing is not part of the sender, it is the (equivalent of the) insulation around the loom connector, on the end of the wire.  I think in reality it's black plastic, not blue, and has a rectangular shape.  The metal inner of the connector is a standard 0.25-inch spade receptacle, crimped onto the loom wire.
Like this:

You may need a new sender, if you have a good connection to it, and the gauge is reading max.

[JoeRadosavljevich]

Right now I am reading some of your knowledge on this subject, Abiton, so will try and replace the temperature sender unit.

Many thanks Abiton, symes.

[Abiton]

One tip for you if you do change the sender.

Get someone else to do it 'cos it's in a bloody awkward place.
Don't try to screw it all the way in. It has a tapered thread, not a constant diameter 'normal' thread. You can see on my old one from the clean and corroded metal that much of the thread does not go in.
You can see this taper in the picture if you look closely.
 It doesn't need to be very tight to seal. Only a few Nm of torque, 10?  Someone may know the correct figure?

[JoeRadosavljevich]

Acknowledged! I really appreciate your help since I desperately need it, I have so many problems to fix in order to put this purple beauty back on the road, hopefully road to the United Kingdom.

[JoeRadosavljevich]

After messing around for a while with the scuttle drain, wiper arms and the rest of the goodies, I finally did manage to gain access to the temp gauge sender. It turned out to be just a matter of faulty connection, id est, no connection between the single wire and the temp sender.

So, Abiton, symes, and the others who wanted to help me but didn't, I owe you many thanks. You're the best. I mean it.