Temp sender

[Rockettvr]

Anyone know what sort of resistances this should put out at various temperatures ? Last year my temp gauge on my 350 always read quite low ( around 80 deg C) changed the stat for a new 88 deg one thinking it may be stuck or faulty but gauge is reading even lower struggling to get to 70 even after a bit of spirited driving. Guessing it's the sender on its way out as water pipes feel much hotter than the 65 deg indicated. Any one got a part no for a replacement please as there seems to be a few different types
Cheers fellas
Ron

[jindle]

Off the top of my head out should be 500 odd when hot

[wild rover]

It might be worth taking it out and clean the internal sensor incase of a build up

[ferlin]

This is a tricky one...
My original part was Smiths TT4806/03 with a red insert.
resistances were as follows:
135 ohms @ 100 degrees C on gauge
160 ohms @ 90 degrees C on gauge
180 ohms @ 80 degrees C on gauge

Equivalents are supposed to be:
Land rover PRC 6317
Lucas SNB 158
Smiths TT4803 / 05

I have fitted Land Rover PRC 6317 and its not calibrated correctly for my 350i and reads about 25 degrees C higher than it should. It was cheap off ebay http://www.ebay.co.uk/itm/Land-Rover-Temperature-S...

I haven't had time to try any other alternative but please let me know if you find the correct one! Nobody on here has been able to quote a definite working part number as far as I have seen. If you paste the original part number into ebay there are two more to try!

[adam quantrill]

If it reads too high you can fit a series resistor to bring it down - as long as the 90 degree mark is set up OK you won't be far off.