Machining different threads on GM CTS

[Layne]

Has anyone ever cut into a GM coolant temp sensor to know how thick the housing is? I need metric threads on it, and I can easily machine them, but I don't know if the case is thick enough for it, and I don't have a spare to cut into.

If that's no good I can just use a european sensor and calibrate for it. The housing it screws into is too thin to tap the pipe threads in.

[fury fan]

I don’t have a direct answer to your question, but I offer a possible alternative solution.

Can you install the CTS into a T-fitting setup into a heater hose? Use a 3/8 NPT t-fitting with 3/8-hosebarb adapters.

[Stag76]

GM Holdens manufactured in Australia use Bosch Sensors that have the standard (2.47K) resistance and a 12X1.5 metric thread. They are also
specified for BMW, Hyundai, Mitsubishi and Subaru.

http://www.injectacarb.com.au/coolant-t ... -p-78.html

[Matt Cramer]

I'm pretty sure the Bosch sensors do not have the GM calibration curve - outside of the US, GM products often used all-Bosch electronics. Saturns often have the standard GM curve with metric threads.

[Jack]

Check out the following, it's the one I use on my Rover intake; metric threads, GM resistances.

Niehoff TS82281

Jack

EDIT Just notice you are squirting BMW. I went to a auto part supplier and just cruised the books for a while and found the right thread/sensor combo. I don't recall what the threads on the above are, but it's worth a look.