[Viper]

My temp gauge doesn't move (cold day) and after a fair run I can feel the header tank is not that hot so I'm thinking its not a sender unit.

Any ideas. Maybe needs a new thermostat????

Where will I find said unit located about the engine??

Many thanks

 

[Leloarer]

Yes, probably a new thermostat or ( and ) a newcoolant temperature transmitter .

I had the same trouble last year, after changing thermostat and the coolant temperature transmitter, all is right now.

 

[Paul Yorke]

Hi Viper,

It does sound like the thermostat has failed if the radiator is not getting hot at the top.

It is located at the engine end of the top hose. In the housing there.

Be aware that the 4 x 7/16" bolts can seize and pull out the thread when you try to remove them ~ so do the job somewhere that it may be stuck for the day without inconvenience. We always have a 3/8" unf helicoil kit at the ready. If it all goes smoothly it should only take about an hour.

We prefer and supply the 'lead shot' type thermostats. The lead shots melt and allow water to flow through the radiator if the thermostat fails closed or the coolant gets far too hot. About £55 inc vat & UK postage.

 

[Viper]

Thanks Guys....I have one on its way

Thanks for the advice re stud removal. 8)