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Thread: What is This? Sensor?

  1. 07-07-2015, 07:10 AM #1
    Richardnew
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    What is This? Sensor?

    The car is a 1973.5 911T

    What is this sensor. It hasn't been attached to anything in the past 30 years - at least.

    Name: What is it?.png Views: 208 Size: 561.1 KB
    Name: FullSizeRender.jpg Views: 198 Size: 41.6 KB

    Richard Newton
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  2. 07-07-2015, 08:42 AM #2
    PStey
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    My guess is that is was an old temp sensor used to plug the hole in the new chainhousing cover when the carrera chain tensioners were installed.
    Peter Stey
    1973 T Coupe with 2.7MFI
    1970 S Targa (sold but not forgotten)
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  3. 07-07-2015, 08:52 AM #3
    PStey
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    My 73.5 also has the carrera chain tensioners and have blanking plugs in the coverName: image.jpg Views: 187 Size: 82.4 KB
    Peter Stey
    1973 T Coupe with 2.7MFI
    1970 S Targa (sold but not forgotten)
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  4. 07-07-2015, 09:57 AM #4
    DG58INNM
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    That's the thermo/time switch, used to engage cold start circuits on MFI and CIS cars. Normally installed in either the crankcase breather cover on MFI cars, or left chain housing cover on CIS cars. Yours appears to be in the right chain housing cover, so perhaps the thought it is a "dummy" used to plug a hole is correct. See if you also have one (connected to something we hope, if you still have CIS) over in the left chain housing cover.
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  5. 07-07-2015, 01:25 PM #5
    Richardnew
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    My CIS left the building about 4 decades ago.

    I have a feeling it's a dummy plug. That makes the most sense. It might look a little neater if I put a real bolt in there. Not today though.

    Richard Newton
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  6. 07-07-2015, 03:34 PM #6
    ESully
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    Definitely should just have a plug in it. 1973.5 CIS cars did not use TTS. My updated covers came with plugs. On the positive side, if that is a good thermal time switch, you can sell it for a few dollars.
    Name: 73Engine001.jpg Views: 154 Size: 111.0 KB
    E Sully
    1973.5 911T
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