Sender for AC temperature gauge

[anonymous-user]

V6Pushfit said:

This was a timely resurrection I was just about to post the question again - has anyone found the part number, or car model that a sensor comes from, that works it's the AC gauge?
If they have I might have missed it but it would be really helpful to have it confirmed.

Bump.... surely someone has info or do I start a new quest ?

[Hansoplast]

Sorry for the incorrect info.
The thread of the Ford sender is tapered.
So I assumed that my adapter needs that type of fitting to become watertight???

Or is a normal bolt also possible? Or even better?

Hans

[anonymous-user]

The male is tapered, it's an old British pipe jointing specification which actually has two types of thread that are partly interchangeable. Anyway the female is always normal parallel thread. The male is brass which is therefore hugely compressed when tightened and forms a seal or that's the idea. You can also use a male non tapered and it will be fine with a bit of PTFE around it.
I think Neil was being ironic with surprise that your female was tapered as it shouldn't be.
I hope that helps

[Dollyman1850]

Hansoplast said:

Sorry for the incorrect info.
The thread of the Ford sender is tapered.
So I assumed that my adapter needs that type of fitting to become watertight???

Or is a normal bolt also possible? Or even better?

Hans

Hans. The bit that screws into your ford block is either 1/4 or 1/8 NPT, some early fords are 5/8 UNF but pretty sure it is 1/4 or 1/8 NPT. The sender unit old type will most likely be 1/4NPT or a BSP fitting. The 1/4 NPT male is readily available (in my link above) and if you buy this bit then you can bore out the 50mm hex to the correct depth and tap the hole to a suitable thread. The other take off can be blanked with an 1/8NPT Blanking plug. You can also get 1/4 female to 1/8 male NPT bush's to allow everything to fit together.

A lot of people tend to get NPT and BSP threads mixed up because the TPI (threads per inch) are very very similar.

Personally I would just fit smiths gauges which makes life much much simpler!!

N.

Edited by Dollyman1850 on Thursday 21st July 19:21

[anonymous-user]

Just to confuse, BSP comes in parallel and taper thread. BSP taper and NPT are not strictly compatible.

[Hansoplast]

[quote=Dollyman1850]


Personally I would just fit smiths gauges which makes life much much simpler!!

N.

Hear hear 😉

But some people like originality.

Thanks for all info I got from you guys.
Must lead to a neat solution.
It's all up to me now.

Hans

[tomtrout]

Looks like the problem here is with the block type. I fitted an old Viva sender into my 711 block and works fine with my original AC gauge. Haven't a clue what the thread size is but was certainly a lower diameter than the original that was fitted into the 681 block.

[anonymous-user]

Do you know which viva it was Tom? Or Neil are you able to enlighten the collective?

Edited by V6Pushfit on Friday 22 July 11:26

[tomtrout]

For the original 981 block it was the V Ventura sender. I'm pretty sure this is the one
http://www.ebay.co.uk/itm/TEMPERATURE-SENDER-NEW-F...

For the later 711 block you want the Viva HC sender with is a smaller diameter.

[anonymous-user]

tomtrout said:

For the original 981 block it was the V Ventura sender. I'm pretty sure this is the one
http://www.ebay.co.uk/itm/TEMPERATURE-SENDER-NEW-F...

For the later 711 block you want the Viva HC sender with is a smaller diameter.

Thanks Tom that's very helpful! It would be good to totally nail the part number of the sender(s) that go with the AC gauge for future reference for Vixens etc. There will be people who have investigated and found the exact info, hopefully your link will be it unless anyone knows an alternative.

[Astacus]

I have one of these going spare in case anyone needs one. They are listed for the Vauxhall Ventora

[Hansoplast]

In the collar of my sender is written 6195 AC as is on your AC parts box.
So the same as mine.
I will bear it in mind, but first try my "adapter" watertightness" .

Hans

[Hansoplast]

Well an happy end at last.

First backed an adapter out of 2 nuts and a male part of an old sender.
Worked fine but for how long.
And when it breaks I have an overheated engine.



So went to a firm that repaired shovels and earth moving vehicles.
The friendly guy took a lot of time to find the right parts because he was not familiar with TVR bits (me neither in this case)
Found 2 parts to make an adapter.



Had to drill out one part to get the long sender in.



But the result is great.



Thanks for all the help and support.

Final test this week.
Hans

[Astacus]

Has anyone tried just drilling out the head and re tapping it to suit? or is the hole too close to the bottom of the thermostat bowl?

Edited by Astacus on Wednesday 3rd August 10:10

[Grantura MKI]

I personally would not fit that, Hans. The bulb of the sender is meant to be covered with water/coolant in order to give you a correct reading.
Best,
D.

[anonymous-user]

Grantura MKI said:

I personally would not fit that, Hans. The bulb of the sender is meant to be covered with water/coolant in order to give you a correct reading.
Best,
D.

+1
Its worth getting a handful of the correct thread sensors and trying them all to find the right range

[Dollyman1850]

V6Pushfit said:

Grantura MKI said:

I personally would not fit that, Hans. The bulb of the sender is meant to be covered with water/coolant in order to give you a correct reading.
Best,
D.

+1
Its worth getting a handful of the correct thread sensors and trying them all to find the right range

50 year old gauges combined with antiquated old senders from a long deduct Vauxhall and you're worried that it not getting full flow over the sender is going to be an issue

[anonymous-user]

Dollyman1850 said:

50 year old gauges combined with antiquated old senders from a long deduct Vauxhall and you're worried that it not getting full flow over the sender is going to be an issue

Many a good tune on an old fiddle

[Dollyman1850]

The other way to do it if people are worried about full flow over the sender head..
Drill and tap to correct thread and fit in line in the main coolant hose..

http://www.carbuildersolutions.com/uk/in-line-self...

Or something posher…

http://www.carbuildersolutions.com/uk/in-line-temp...

N.

Edited by Dollyman1850 on Wednesday 3rd August 19:14

[anonymous-user]

Shame on you that's not OE! You'll be fitting ali valve caps next.