Lotus Elan

Water Temperature Sender - what thread?

PostPost by: mmatthej1 » Thu Mar 23, 2017 3:46 pm

Does anyone know thread type / size used on the WT sender unit, please?
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PostPost by: mmatthej1 » Thu Mar 23, 2017 3:47 pm

Oh sorry, I referring to the +2 electrical sender unit................
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PostPost by: bob_rich » Thu Mar 23, 2017 7:42 pm

HI

I believe it is 3/8" BSP. That was the thread on my sender that bolted into the head by the thermostat housing.
That was on my +2 but don't know if my head was ever modified in the past. I would wait for a further confirmation.

Hope this helps best of luck

Bob
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PostPost by: quaybook » Fri Mar 24, 2017 8:44 am

On my S2 two seater Elan, with the old type capillary gauge, the tapping in the head is 3/8 BSP with an adaptor to 5/8 UNF on the sender.

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PostPost by: mmatthej1 » Fri Mar 24, 2017 4:56 pm

Thanks for responses - my Sprint has a Smiths electrical temp gauge but sender has gone bad, so I'm trying to get a replacement.

I was wondering if the +2 sender would fit but seems not, as my thread seems to be 3/8 UNF, albeit going into an adaptor screwed into the head (which is presumably a BSP thread).

I sourced a replacement from "Smiths" but it is 1/8 NSP, so won't fit, though I'm hoping to 'convert' the thread by running a UNF die down it - crossed fingers!
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PostPost by: mmatthej1 » Mon Mar 27, 2017 9:35 am

Yes, thread now converted and car back on the road !
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