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Oil pressure pipe problems
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1935Hillman



Joined: 06 Apr 2010
Posts: 257
Location: Hampshire

PostPosted: Mon Jun 06, 2016 6:17 pm    Post subject: Oil pressure pipe problems Reply with quote

Hello again all,

I have a small problem trying to fit my oil pressure pipe which you may be able to help me with.
I found among my spares a double ended brass fitting which screws nicely into the prewar Hillman engine block. It has a short cut off piece of old pipe with a solder nipple and a brass nut on the other end and both end threads are the same. So far, so good.
I wanted to buy a new nipple and nut so measured the thread. It measures approximately 9.5mm across its major diameter and would appear to have a tpi of 20. By my reckoning this almost certainly makes it a 3/8 bsf but it is not possible to get brass pipe fittings in bsf surely ?
1/8 bsp would be 9.7mm diameter which is possible to believe it could be but is also 28 tpi which is most definitely is not.
The whole thread thing is boiling my noodle quite honestly and I have another similar problem at the gauge end too but I'll come back to that later.
If you can help I would be very very grateful as I am quite held up by what must be a pretty simple matter. Thank you
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peter scott



Joined: 18 Dec 2007
Posts: 6177
Location: Edinburgh

PostPosted: Mon Jun 06, 2016 9:05 pm    Post subject: Reply with quote

If the block is threaded 3/8" BSF why not just make a little adaptor to screw in and provide you with a BSP connection?

Peter
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1939 SS Jaguar 2 litre saloon
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1935Hillman



Joined: 06 Apr 2010
Posts: 257
Location: Hampshire

PostPosted: Tue Jun 07, 2016 3:18 pm    Post subject: Reply with quote

Hi Peter,

That is quite rightly probably the best and quickest solution. It is just a little frustrating when one comes up against a problem with something that must have been fitted to hundreds of thousands, possibly millions of cars over the decades.

Thanks for your reply though Very Happy
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1935Hillman



Joined: 06 Apr 2010
Posts: 257
Location: Hampshire

PostPosted: Thu Jun 09, 2016 8:37 am    Post subject: Reply with quote

I should have had more faith !

My very good friend Sue from Flexolite has come up trumps for me. A very nice little adapter piece arrived in the post from her which fits really nicely on the gauge and leaves a very neat 1/8 bsp male fitting to get on to.

Just need to deal with the engine block end and we are sorted. I will be able to get an adapter made as Peter suggests but would just like to explore further the possibility of finding the correct one i.e. as it came from the factory.

Nearly there !

Thanks, Tim
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