Fiat temperature sensor

[fsk658]

Does anyone know the thread size of the Temperature sensor unit fitted into the top of the cylinder head on the 1500cc fiat twincam engine, Thanks John

[Jefftav]

Try this site http://guy-croft.com/index.php or http://www.sportingfiatsclub.com/forum/default.asp

[fsk658]

Thanks very much Jefftav. Found the size on Guy Croft racing it is 3/8 BSP which did surprise me, I thought it would be a metric thread. Now I can get a new smiths sender unit for my Pick up.

[Jefftav]

I don't know if it works yet as I haven't ran my twin cam engine for long enough but I have fitted a cappillary type of temp guage. It came with various adaptors one of which fitted the twin cam head.

[wfb]

I've got am mgb/1800 marina one fitted to my twin cam and it works perfectly.

[fsk658]

Thanks guys, I have been using my smiths guage for years, but with the Fiat temp sender it works but I am not happy with the higher end of the scale, so to be on the safe side I will get the proper sender to match the guage unit now I know the thread size. I have the capilery one in my 1098 saloon and that is very accurate and works very well.

[dp]

If you've the old temp sensor you could pull the plastic out and tap the brass for the correct sensor for your guage if it's smaller. I did this with Skoda guage to get the matching sensor

[fsk658]

Update on my temp sensor. The thread size in the cylinder head of my engine is a Metric thread 16mm x 1.5 mm Not a BSP as I was told. I have located an adaptor to fit with an 1/8 NPT internal thread to suit the new sender unit. John