[Healeys] Union - oil gauge pipe

[Mark Donaldson]

Harold,

I agree with Mirek.  I’ve checked both of my spare 3000 blocks, and a Wolseley 6/110 block.  All have the ½” straight union.

That yours is tapered suggests it has perhaps been modified at some time.

 

Mark

Ardmore, NZ

 

          

 

From: Harold Manifold <manifold at telus.net> 
Sent: Monday, 30 May 2022 5:24 AM
To: m.g.sharp at sympatico.ca; Ken Fleming via Healeys <healeys at autox.team.net>
Subject: Re: [Healeys] Union - oil gauge pipe

 

After the comments I checked the measurement of the fitting. The pitch is 28 TPI and the major diameter at the top is 0.402” and 0.372” at the bottom. The measured taper is very close to the 16:1 for BSPT. These measurements fit very closely to a 1/8” BSPT except the measured major diameter is more than the 0.383” listed for BSPT.

 

The hole in the block is tapered as well. 

 

I will check the threads in the block to see if they are clean and in good shape. I am quite sure these are original parts, are there some other obsolete British tapered fittings slightly larger than BSPT? Whatever size this fitting is it won’t be easily replaced or repair and I will be very careful with it.

 

Harold

 

From: m.g.sharp at sympatico.ca <mailto:m.g.sharp at sympatico.ca> 
Sent: Sunday, May 29, 2022 8:14 AM
To: Harold Manifold <mailto:manifold at telus.net> ; Ken Fleming via Healeys <mailto:healeys at autox.team.net> 
Subject: RE: [Healeys] Union - oil gauge pipe

 

I am quite sure the thread into the block is straight, not tapered.  The adaptor should screw up hard onto the copper washer.  The thread may be bunged up with crud, so measure the thread on the adaptor and carefully run a tap down the hole in the block.  If it starts cutting metal, I’d stop and figure it out, but I bet it will just clean up the threads and the adaptor will screw in.

 

Cheers, Mirek

 

From: Healeys <healeys-bounces at autox.team.net <mailto:healeys-bounces at autox.team.net> > On Behalf Of Harold Manifold
Sent: May 28, 2022 9:51 PM
To: Ken Fleming via Healeys <healeys at autox.team.net <mailto:healeys at autox.team.net> >
Subject: [Healeys] Union - oil gauge pipe

 

Hello,

 

I would like some clarification about the “Union - oil gauge pipe” before I over tighten and break something. Number 56 in the picture below. The threads going into the block are definitely tapered, however, the Union gets tight before sealing against the washer (No. 57). I don’t want to over tighten and damage the threads as I suspect the threads are not a standard size. I was thinking of using two copper washers and thread sealant.

 

Any other suggestions?

 



 

Harold

 

 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/healeys/attachments/20220530/61f644f7/attachment.htm>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image004.jpg
Type: image/jpeg
Size: 30363 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20220530/61f644f7/attachment.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image002.jpg
Type: image/jpeg
Size: 23208 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20220530/61f644f7/attachment-0001.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image003.jpg
Type: image/jpeg
Size: 33023 bytes
Desc: not available
URL: <http://autox.team.net/pipermail/healeys/attachments/20220530/61f644f7/attachment-0002.jpg>