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 J2 Inlet Manifold Brass Plug		  Forum Locked  Topic Locked
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Cymber

United Kingdom
966 Posts
Posted - 16/11/2014 :  19:50:14  Show Profile
Sam,
The measurement shown on your rule for the inner diameter appears to be about 27/32" which is very close to 55/64" which is the tapping size for 5/8 BSP in which case the TPI should be 14. I hope this helps but I guess 5/8 BSP plugs are probably few and far between.

Maurice.
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sam christie

United Kingdom
3114 Posts
Posted - 21/11/2014 :  17:53:48  Show Profile
I am pleased to say that I now have a suitable brass plug - thanks to Terry Holden. I still do not know what the thread is but clearly the thread on my inlet manifold is the same as on other MG J type inlet manifolds, and it works. Thanks again Terry.

Sam
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Peter Green

United Kingdom
1682 Posts
Posted - 21/11/2014 :  20:07:26  Show Profile
Sam,

Now that you have a plug please can you tell us what the TPI is.

Peter
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Jamie

Canada
218 Posts
Posted - 21/11/2014 :  22:37:32  Show Profile
Peter
I just removed the plug from my J2 (both plug and manifold original) and the the plug measures TPI 10
Jamie Neilson

Jamie
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tholden

United Kingdom
1640 Posts
Posted - 21/11/2014 :  22:44:45  Show Profile
Yes the one I gave Sam was 10 TPI as well. Looks like a whitworth thread.

TH
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Cymber

United Kingdom
966 Posts
Posted - 22/11/2014 :  19:57:39  Show Profile
Looks like it may be 1" BSF That is 10 TPI

Maurice.
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Bruce Sutherland

United Kingdom
1579 Posts
Posted - 22/11/2014 :  21:01:40  Show Profile
Gentlemen,
10TPI (threads per inch)is either 1.0" BSF or 3/4" BSW, then check the major thread diameter to establish which.

Bruce. (PB0564)
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Drolshagen

Germany
680 Posts
Posted - 23/11/2014 :  08:45:56  Show Profile
Hi All,
it is definite 1" BSF





Carl
J2 4362
L2 2036
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sam christie

United Kingdom
3114 Posts
Posted - 23/11/2014 :  09:52:45  Show Profile
Brilliant! Thanks to all.

Sam
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