Spare coolant temperature sender - thread size?

[Pupp]

Anyone know the thread size on the 'spare' coolant sender (one just behind the ECU sender on our cars), the one that is often said to be in a better location than the TVR gauge sender? Is it 1/8 NPT anyone able to confirm?

[Alexdaredevils]

I got two spare at home if you want one, couldn't say 100% what size though

[Pupp]

Thanks Alex... I have a new sender I want to use; just trying to confirm it will pop straight in that location.

[spend]

Be careful I have a feeling LR used a couple of different threads for the LR gauge sensor, just pull it out to check you won't lose much coolant from there.

Originally I wondered if it was folks getting confused between the different manifolds but I'm sure there was a post a while ago where someone had quite a large dia thread. If you want nptf, you can always pull out the throttle heater take off pipe and tap that npt?

[Ozstyle]

Hi,
I can confirm that the Rover water temp sender is a 1/8 27 npt thread size.
This fitted to my late 94 Griffith. A quick search on ebay for the appropriate Rover V8 water temp sender also points to this fact.

[Pupp]

Thanks, it certainly looks of that ilk and makes life nice and easy if so - next silly Q is anyone know the thread size for the extension spur that threads into the manifold as as fitted by TVR for their gauge sender - ie what size bung would be needed to delete (my OCD is offended by a multiplicity of unused senders hanging out of a motor and there's at least half an ounce to be saved)?

[Alexdaredevils]

I got that bung and sensor here as well Pupp

[Pupp]

Well get measuring then!

[Alexdaredevils]

With what? I don't have any pipe thread measuring stuff, I will give it my best shot when I'm home, failing that I'm only about 10miles from you,you can measure it!

[Pupp]

Looks like it might be m12 x 1.5...

[Alexdaredevils]

Yhm

Edited by Alexdaredevils on Tuesday 15th April 19:16

[portzi]

l rethreaded mine a while back to suit tvr sender which is bigger measuring 1/4 nptf from memory . l drilled it with a modified drill to taping size, about 2 mm was drilled out so only small bits of swarf to fish out and very little was lost once l got the vacuum cleaner on it. !!. l had to file a large chamfer on one side of the sender as it foulded on the steel rail above it which goes round the base of the pelum . As for reading it is reading 10% hotter than the original location so fans are kicking in at 100 on the gauge. A lazer temp sender has confirmed this temp.

mark

Edited by portzi on Tuesday 15th April 19:46