Morris Minor Owners Club

Hi, I'm trying to find a housing/adaptor to fit in the cylinder head near the thermostat. At the moment there is a blanking plug, my idea was to remove that, fit an adaptor & sender for a temp gauge, failing that, any other ideas on where to fit the sender. I've looked on esm, bull & charles Ware. Another option I'm toying with is to remove the plug & try to drill & tap to fit the sensor
Any thoughts??
Thanks
Barry

They seem to have the adaptors at Holden, http://www.holden.co.uk/displayproducts ... E+Fittings
Do you have a "non standard" sender unit?
I would think the reason the usual suppliers don't do them is because they only supply the "standard" range of senders for the engine.

Hello Richard, Thankyou for that, Yes the sender is 1/8npt, thats my problem!

The thread in the head is 5/8" UNF, so you will need an adaptor with a 5/8" UNF male thread and a 1/8" NPT female thread - both are parallel threads.

The standard Mini type water temperature gauge sender was 5/8" UNF, but many of the aftermarket senders are 1/8" NPT. Have not seen an adaptor available yet - has anyone?

If you are anywhere near Oxford, I can drill and tap the blanking plug 1/8" NPT for you.

Hi Richard
VERY Kind of you! sadly Bergerac is a little too far
I have seen a tap on ebay I was thinking of buying & having ago, alternatively moss has a 5/8" sender for a fiver, do you think that would work with an elec gauge & then I just put the sender that was sent into stock!!
Thanks

It's a gamble - and then you need to consider if the gauge needs to be fed from the 10 volt regulated supply...Thye usually do - if you want an accurate reading.

Hi all,

I plan to fit a temperature sender with a Smiths temp gauge on my Minor 948cc 1957, which does not have the sender hole on the engine block. Have spent 3 months searching and found a thermostat housing which has a pre-drilled hole to fit the sender unit, finally arrived today from Melbourne and I have the sender unit GTR101 from MOSS.

Both are 5/8" UNF but the sender seems to be a little long, when tightened, about 2 circles of the thread still sticks out. The thermostat housing hole as a tapered seat which fits well with the sender unit which also has a tapered seat, and the protruding "sensor" nozzle fits nicely into the housing as well.

I have not fitted or tested both of them yet, but would like to know if the fitment would be a problem for a leak? There's no point in placing a washer/gasket on top of the thread as it will not fully screw in, but will the tapered seat seal itself, sender and housing?

Regards,
Chris

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If it was me I would drill the shoulder out in the housing and fit the sensor with ptfe tape on the thread.

Yes, considered that option. Another was trying the GTR108, at additional costs
It looks like it has a longer neck without the tapered seat.

Maybe try a thin copper washer on the taper, it will deform to the right shape as it's tightened up.

He won't have enough thread left then Panky

That's a Mini one, Isn't it? The neck angles up quite a long way, IIRC. Might it not make life difficult to connect to the rad?

No, you just use a cut down bottom hose

Rob,

I think it's the standard one for the A-series engine, the 1098cc has the sender hole in the engine block. The thermostat housing is the non-standard Minor item, but the seat tapers well on both.

Amgrave,

If I would go the drilling and ptfe route, would grounding be an issue? Note that this is a single wire unit.

Guys,

Found a solution, 5/8" UNF male to female adaptor. For £2.50 from MOSS, it's worth a try.

Thanks to all.

Chris

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It should still be OK as the thread cuts through the PTFE so there should still be some electrical contact. Try drilling the shoulder down a little but not right through if it's a concern.