Suitable water temp sender for Morris Marina thermostat housing
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- Minor Legend
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Suitable water temp sender for Morris Marina thermostat housing
Hi,
I have bought this (pictured) Morris Marina thermostat housing in which to install a water temp sender on my 948 engine. I have done this before but can't find the receipt for the sender or remember where I got it from (wish I'd bought a spare now - doh!).
Does anyone know which sender will fit this (or have a link to one)?
I tried my local motor factor but all he kept saying was that it originally took a blanking plug, which I believe is technically correct but not what I am looking for.
As always any help is greatly appreciated.
Best wishes,
Mike.
I have bought this (pictured) Morris Marina thermostat housing in which to install a water temp sender on my 948 engine. I have done this before but can't find the receipt for the sender or remember where I got it from (wish I'd bought a spare now - doh!).
Does anyone know which sender will fit this (or have a link to one)?
I tried my local motor factor but all he kept saying was that it originally took a blanking plug, which I believe is technically correct but not what I am looking for.
As always any help is greatly appreciated.
Best wishes,
Mike.
- Attachments
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- Morris Marina thermostat housing.jpg (166.92 KiB) Viewed 2191 times
1954 Series 2: 4 door: "Sally" -- Back on the ground with (slave) wheels and waiting to be resprayed......
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
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- Minor Maniac
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Re: Suitable water temp sender for Morris Marina thermostat housing
The threaded hole in the top of the Marina thermostat housing is indeed normally fitted with a blanking plug which can be removed to top up and check the coolant level.
The way I got around the difference in size of the thermostat housing top hole and the size of the hole required for the transmitter was to purchase a brass blanking plug https://www.ebay.co.uk/itm/Land-Rover-D ... 2749.l2649 and drill and tap to suit either the adapter (capillary) or the transmitter (electrical).
Also done by Sandun if you can find his thread.
Picture by Sandun
I put this link in as it shows the Marina thermostat housing with the adapter fitted and placed on a head.
viewtopic.php?f=4&t=67822&p=618567&hili ... ng#p618567
I drilled the three 5/16" stud holes to 3/8" to give a better alignment between thermostat housing and Minor radiator.
Make sure that the transmitter does not foul the thermostat when the thermostat opens.
The way I got around the difference in size of the thermostat housing top hole and the size of the hole required for the transmitter was to purchase a brass blanking plug https://www.ebay.co.uk/itm/Land-Rover-D ... 2749.l2649 and drill and tap to suit either the adapter (capillary) or the transmitter (electrical).
Also done by Sandun if you can find his thread.
Picture by Sandun
I put this link in as it shows the Marina thermostat housing with the adapter fitted and placed on a head.
viewtopic.php?f=4&t=67822&p=618567&hili ... ng#p618567
I drilled the three 5/16" stud holes to 3/8" to give a better alignment between thermostat housing and Minor radiator.
Make sure that the transmitter does not foul the thermostat when the thermostat opens.
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- Minor Legend
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- Joined: Fri Apr 11, 2008 7:28 pm
- Location: Mansfield, Nottinghamshire.
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Re: Suitable water temp sender for Morris Marina thermostat housing
Thanks Phil,
I have purchased a brass blanking plug, with a view to drilling and tapping it to suit a sender unit.
I will still be looking out for a sender like the one I acquired last time, that'll teach me not to buy a spare and keep the box, eh!
Best wishes,
Mike.
I have purchased a brass blanking plug, with a view to drilling and tapping it to suit a sender unit.
I will still be looking out for a sender like the one I acquired last time, that'll teach me not to buy a spare and keep the box, eh!
Best wishes,
Mike.
1954 Series 2: 4 door: "Sally" -- Back on the ground with (slave) wheels and waiting to be resprayed......
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
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- Minor Fan
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Re: Suitable water temp sender for Morris Marina thermostat housing
Mike,
The one that I have fitted is a Intermotor 52760 Temperature Transmitter. This fits into the standard head threaded boss. £6.50 off Amazon.
The one that I have fitted is a Intermotor 52760 Temperature Transmitter. This fits into the standard head threaded boss. £6.50 off Amazon.
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- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
Does your 948 not have a plug at the front of cylinder head?
- geoberni
- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
Not unless it's been modified with a latter head. My SII had a 948 Goldseal fitted at some time in it's life, I'm not sure when, and that had the blanking plug, but original Minor Era 948 engines did not.JOWETTJAVELIN wrote: ↑Sun Aug 25, 2019 12:09 pm Does your 948 not have a plug at the front of cylinder head?
Basil the 1955 series II
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- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
Strange, I wonder when they were introduced. My 948 has a blanking plug but it is in the last 1000 of production if that makes any difference.
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- Minor Maniac
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Re: Suitable water temp sender for Morris Marina thermostat housing
A photo of the head with blanking plug shown and details of the head casting number would be appreciated.
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- Minor Fan
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Re: Suitable water temp sender for Morris Marina thermostat housing
How difficult is it to remove the blanking plug for the temp sender? I had to weld a wheel nut on to remove the blanking plug so that I could fit a bypass hose on a 940 head.
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- Minor Maniac
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Re: Suitable water temp sender for Morris Marina thermostat housing
I have never had any difficulty in removing the temp gauge blanking plug as it is a much more solid item than the bypass hose stub and has the benefit of a hexagon head for a socket or spanner to grip against.
Temp gauge transmitter hole (940 head) at bottom right of photo below.
Temp gauge transmitter hole (940 head) at bottom right of photo below.
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- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
Hi,Does your 948 not have a plug at the front of cylinder head?
No holes or blanking plugs on mine...
Best wishes,
Mike.
1954 Series 2: 4 door: "Sally" -- Back on the ground with (slave) wheels and waiting to be resprayed......
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
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- Minor Addict
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Re: Suitable water temp sender for Morris Marina thermostat housing
My 1098 engine on my 63' has no thread for a temp sender. It's the original engine.
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- Minor Maniac
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Re: Suitable water temp sender for Morris Marina thermostat housing
The 1098cc engine is/should be fitted with the 12G202 cylinder head which has a temp transmitter fitment hole just under the thermostat housing on the spark plug side of the head.
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- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
Postby paul 300358 » Sun Aug 25 2019 9:22 am
This will fit my Marina housing?
Many thanks,
Mike.
Hi Paul,Mike,
The one that I have fitted is a Intermotor 52760 Temperature Transmitter. This fits into the standard head threaded boss.
This will fit my Marina housing?
Many thanks,
Mike.
- Attachments
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- Morris Marina thermostat housing.jpg (166.92 KiB) Viewed 2018 times
1954 Series 2: 4 door: "Sally" -- Back on the ground with (slave) wheels and waiting to be resprayed......
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
1970 Triumph Herald 1200: "Hetty" -- Driven back from Llangollen in Wales (twice.....)
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- Minor Maniac
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Re: Suitable water temp sender for Morris Marina thermostat housing
The standard temp gauge hole/thread in the head is 5/8" UNF and the hole/thread in the Marina thermostat housing is 1/2" BSP (13/16").
The hole in the head has a seat for the transmitter to seat and seal against. The Marina thermostat housing does not have a seat which may make it difficult to seal the transmitter in the housing.
The only way round it is to make/use an adapter to suit either the capillary type transmitters or the electrical type transmitter.
When the early capillary type transmitter is fitted to the head there has to be a another 5/8" UNF male to 1/2"BSP male adapter screwed into the head to allow the 1/2" BSP female nut that secures the capillary tube bulb to be attached.
Later capillary type transmitters when fitting to the head will also need adapter https://www.moss-europe.co.uk/adaptor-t ... soc=506734
As the Marina Thermostat housing thread is 1/2" BSP a double ended 15mm pipe joiner can be screwed into the housing which will accept the early capillary tube transmitter and securing nut.
When fitting the capillary tube - the clearance between capillary bulb and thermostat must be checked.
The hole in the head has a seat for the transmitter to seat and seal against. The Marina thermostat housing does not have a seat which may make it difficult to seal the transmitter in the housing.
The only way round it is to make/use an adapter to suit either the capillary type transmitters or the electrical type transmitter.
When the early capillary type transmitter is fitted to the head there has to be a another 5/8" UNF male to 1/2"BSP male adapter screwed into the head to allow the 1/2" BSP female nut that secures the capillary tube bulb to be attached.
Later capillary type transmitters when fitting to the head will also need adapter https://www.moss-europe.co.uk/adaptor-t ... soc=506734
As the Marina Thermostat housing thread is 1/2" BSP a double ended 15mm pipe joiner can be screwed into the housing which will accept the early capillary tube transmitter and securing nut.
When fitting the capillary tube - the clearance between capillary bulb and thermostat must be checked.
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- Minor Fan
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- geoberni
- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
It's American 'National Pipe Taper Fuel'. How that compares to 'British Standard Pipe', I've no idea.paul 300358 wrote: ↑Tue Aug 27, 2019 9:44 am What's a 1/2 inch NPTF? https://www.carbuildersolutions.com/uk/ ... X8QAvD_BwE
Perhaps your link is for people maintaining vintage US vehicles.
Basil the 1955 series II
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- Minor Maniac
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- Minor Fan
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Re: Suitable water temp sender for Morris Marina thermostat housing
Its interesting as both 1/2 inch NPTF and 1/2 inch BSP have 14 tpi and 1.8143mm thread pitch. But they could be slightly different diameters.
- geoberni
- Minor Legend
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Re: Suitable water temp sender for Morris Marina thermostat housing
I just found this:http://www.flow-controls.com/news/The-d ... on-20.htmlpaul 300358 wrote: ↑Tue Aug 27, 2019 10:38 am Its interesting as both 1/2 inch NPTF and 1/2 inch BSP have 14 tpi and 1.8143mm thread pitch. But they could be slightly different diameters.
If I read this correctly, at 1/2" and 3/4" they are the same
Where there is a difference is that the American one has the F suffix, indicating it is for 'Fuel' which are designed for a dry interference fit between male/female threads, whereas a normal NPT/BSP would have space at the peaks and troughs of the thread to use a sealant, e.g. tape or paste.
Basil the 1955 series II