[Healeys] Oil pressure gage fitting

[Michael Salter]

I noticed that the gauge line adaptor on the 100 has a different part
number from that on the 6 cylinder engines 6K22 and 1G1814.
The 100 engine is all BS threads whereas the 6's are Unified threads.
My guess is that the parts are not interchangeable.

M


On Sat., Sep. 2, 2023, 12:24 p.m. Harold Manifold, <manifold at telus.net>
wrote:

> Hello,
>
> I have a spare one of these adapters but it came off of a 3000 engine from
> a MkI and it might be different from what was used on the 100.
>
> Here are the specs. Small side that threads into the block is 1/8" BSPT -
> tapered thread 28 TPI. The large side is 1/4 BSPP - parallel thread 19 TPI.
> Note that NPT may be close in size but has a different thread form than
> BSP. I made mistakes identifying fittings when I started restoring my car
> and learned the hard way to measure twice. All of the pipe and tubing
> fittings on my car were either BSPT or BSPP.
>
> I hope this helps.... Harold
>
> On Sat, Sep 2, 2023 at 1:58 AM Kees Oudesluijs via Healeys <
> healeys at autox.team.net> wrote:
>
>> AFAIAC these fittings are always BSP,  usually tapered male, parallel
>> female threads. BSP fittings and adaptors are cheap and widely available in
>> e.g. DIY shops or plumbers, at least in EU, but I also saw these in in US
>> hardware shops.
>> BSP (UK) threads are similar to NPT (USA) but the top angle of the thread
>> profile is 55degrees for BSP and 60degrees for NPT. You usually can feel
>> the difference as BSP has a rounded top while the NPT has a flatttened top
>> that feels sharper.
>>
>>
>> Op 1-9-2023 om 16:24 schreef warthodson--- via Healeys:
>>
>> Surely, someone has the specs on this adaptor?
>> Gary Hodson
>>
>> On Wednesday, August 30, 2023 at 06:06:57 PM CDT, warthodson--- via
>> Healeys <healeys at autox.team.net> <healeys at autox.team.net> wrote:
>>
>>
>> What are the thread specifications for the adapter/fitting between the
>> block & the oil press. gage flex line on a 100?
>> I would like to know the TPI, thread form, and are the threads straight
>> or tapered & anything else important that I forgot to ask about.
>> Thanks,
>> Gary Hodson
>>
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