1/2" BSF Threaded Sender or Adaptor

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andythilo

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Anyone know where I can get either a 1/2" BSF temperature sender or threaded adaptor for my BMC Newage Navigator?
 
andythilo said:
Anyone know where I can get either a 1/2" BSF temperature sender or threaded adaptor for my BMC Newage Navigator?
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it wont be 1/2" BSF, it will be BSP, and the OD of the pipe isnt where you measure it. 1/8" BSP is about 3/8" OD, 1/4"BSP is about 1/2" OD
Stu
 
I took it to an old engineering workshop and thats what they told me. He even had a 1/2" BSF socket that it screwed into??
 
BSP (British Standard Pipe) describes the thread form.

1/2 inch BSF sounds like the size of socket that fit the sender.

Oh, my money is on the sender unit being BSP.

73s de
Johnth
 
andythilo said:
I took it to an old engineering workshop and thats what they told me. He even had a 1/2" BSF socket that it screwed into??
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Assuming that the engine is based on an A or B series BMC engine, and I am pretty certain it will be, I am certain, from first hand knowledge, that the gauge fittings are BSP
Stu
 
andythilo said:
Anyone know where I can get either a 1/2" BSF temperature sender or threaded adaptor for my BMC Newage Navigator?
Click to expand...

All these fellas are too young to remember what BMC used in the dark ages.:D

Your engine is a derivative of the BMC B series engine and quite possibly has BSF threads I would suggest you try Halford's as they have a selection on the shelf and if not try various scrappies. You are looking for Morris or Austin car engines of the 60s or 70s unfortunately a lot of these cars had a spirit bulb sender so you might have a problem finding one.

You may have to get an adaptor made to use with a modern one however you will have to match the resistance values of the old one or get a new sender and gauge.
 
Ok well I don't know either way :(

The guy said BSF stood for British Standard Fine and that it was an obsolete size. Google confirms this.

Ok well does anyone know where I can get a 1/4" BSP sender with alarm?
 
Pop into your local plumbers merchant 'Plum Centre' with your sender and get them to try their Brass BPS fittings on it then you know the size you will then need a reducer to fit the engine block that they should be able to supply.
Job done.

Quote:-The guy said BSF stood for British Standard Fine and that it was an obsolete size. Google confirms this.

What poppycock never heard that excuse before certainly never in a Proper Engineering Workshop.
 
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Bilgediver said:
All these fellas are too young to remember what BMC used in the dark ages.:D

Your engine is a derivative of the BMC B series engine and quite possibly has BSF threads I would suggest you try Halford's as they have a selection on the shelf and if not try various scrappies. You are looking for Morris or Austin car engines of the 60s or 70s unfortunately a lot of these cars had a spirit bulb sender so you might have a problem finding one.

You may have to get an adaptor made to use with a modern one however you will have to match the resistance values of the old one or get a new sender and gauge.
Click to expand...
The engine bolts and studs were UNF and UNC on the later B series, see here http://books.google.co.uk/books?id=...epage&q=BMC B series engine unf studs&f=false
And as I said the guage connections were always BSP
Stu
 
Ok bit more info.

The head on my sender is 5/8", measured at 15.9mm approx using calipers.

The thread outside diameter is 15.6mm, ID approx 14mm

I measured that the thread length is 9.1mm and there are 7 threads.

Therefore 1 thread is 1.3mm, 1" = 25.4mm

Therefore 1" = approx 19.54 TPI.

Approx sizes of course. Does this help at all?
 
Looking at the VDO spec sheet there is a temp sender that is 5/8 inch dia 18 tpi UNF-3A.

The VDO part number is 323.801/001/008. This is single terminal commom ground 40-120 C

There is another same size -2A taper seat part no 323.805/001/002

Hope that helps.
 
Race and rally type car shops are quite good, I found Merlin Motorsports at Castle Combe very helpful.
Alternatively, you could get a brass plumbing fitting and re-tap it metric.
BTW why are there BSP fittings on a japanese Yanmar?!
 
lw395 said:
Race and rally type car shops are quite good, I found Merlin Motorsports at Castle Combe very helpful.
Alternatively, you could get a brass plumbing fitting and re-tap it metric.
BTW why are there BSP fittings on a japanese Yanmar?!
Click to expand...

You would be surprised just how widely BSP threads are used, not always called that (the Frogs call the Gaz) but still the same. Interestingly quite a few electrical fittings also use BSP because they were originally designed to replace gas light fittings.
 
Not on my MGB and mini.

All BMC cars I have worked in since my first A35 in 1965 has UNF threads and the 1962 MGB I am currently rebuilding has UNF threads throughout.
 
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