+- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum)
+-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1)
+--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14)
+--- Thread: Machined core plugs (/showthread.php?tid=835)
Machined core plugs - Steve Bryant - 18-02-2018
Although not original, I thought I would show you the threaded core plugs I made for my '29 cylinder block.
The correct plugs are the domed disc plugs you insert and expand with a dent in the center but sometime in the past the previous owner had elected to tap these holes for 5/8" BPT plugs which had to be drilled out in order to gain access to the corrosion plugged cooling channels in the block. I got about a cup of rust out of the block.
I modified two modern plugs to resemble the large core plugs already in the block so that they would not look out of place.
Fiddly work but I am pleased at how they turned out.
Stephen
RE: Machined core plugs - steve davidson - 18-02-2018
They look great
RE: Machined core plugs - cardiffrob - 18-02-2018
Yes, very nice work.
RE: Machined core plugs - Zetomagneto - 18-02-2018
(18-02-2018, 07:16 PM)steve davidson Wrote: They look great
Hi Steve, nice work.This is a vintage block and had screw in plugs.Later blocks have the steel disc core plugs.
RE: Machined core plugs - Colin Wilks - 18-02-2018
They look smart, but I'm wondering how you intend getting a good seal. Are you going to rely on the fibre washer alone, or something else?
I 'm thinking the threads look to be parallel rather than taper, and the face of the block doesn't look like a perfect surface on which to to get a seal.
RE: Machined core plugs - Chris KC - 18-02-2018
Yes I do think a thread sealant of some description might be a good idea - something with a low shear strength so it can be undone again in the future.
RE: Machined core plugs - Tony Press - 18-02-2018
(18-02-2018, 06:12 PM)Steve Bryant Wrote: Although not original, I thought I would show you the threaded core plugs I made for my '29 cylinder block.
The correct plugs are the domed disc plugs you insert and expand with a dent in the center but sometime in the past the previous owner had elected to tap these holes for 5/8" BPT plugs which had to be drilled out in order to gain access to the corrosion plugged cooling channels in the block. I got about a cup of rust out of the block.
I modified two modern plugs to resemble the large core plugs already in the block so that they would not look out of place.
Fiddly work but I am pleased at how they turned out.
Stephen
Nice job- originally there were no plugs fitted here and this modification is very useful in keeping the block clean in this area.
Mine are fitted with square head taper plugs - hopefully easier to remove.
Cheers Tony.
RE: Machined core plugs - Steve Bryant - 18-02-2018
(18-02-2018, 08:32 PM)Colin Wilks Wrote: They look smart, but I'm wondering how you intend getting a good seal. Are you going to rely on the fibre washer alone, or something else?
I 'm thinking the threads look to be parallel rather than taper, and the face of the block doesn't look like a perfect surface on which to to get a seal.
Hi Colin,
i can assure you that the treads are tapered. It took me ages to find two 5/8 BPT x 19 (I think) TPI plugs locally. There will be thread seal applied to the threads on installation. So the fiber washer is a secondary seal. The sealing surface on the block is better than it looks too by the way.
Stephen
RE: Machined core plugs - Zetomagneto - 19-02-2018
(18-02-2018, 10:56 PM)Tony Press Wrote:Tony, surprised at you saying that, I have seen numerous blocks with 2 core plugs at each end(18-02-2018, 06:12 PM)Steve Bryant Wrote: Although not original, I thought I would show you the threaded core plugs I made for my '29 cylinder block.
The correct plugs are the domed disc plugs you insert and expand with a dent in the center but sometime in the past the previous owner had elected to tap these holes for 5/8" BPT plugs which had to be drilled out in order to gain access to the corrosion plugged cooling channels in the block. I got about a cup of rust out of the block.
I modified two modern plugs to resemble the large core plugs already in the block so that they would not look out of place.
Fiddly work but I am pleased at how they turned out.
Stephen
Nice job- originally there were no plugs fitted here and this modification is very useful in keeping the block clean in this area.
Mine are fitted with square head taper plugs - hopefully easier to remove.
Cheers Tony.
RE: Machined core plugs - Tony Press - 19-02-2018
(19-02-2018, 12:32 AM)Zetomagneto Wrote:(18-02-2018, 10:56 PM)Tony Press Wrote:Tony, surprised at you saying that, I have seen numerous blocks with 2 core plugs at each end(18-02-2018, 06:12 PM)Steve Bryant Wrote: Although not original, I thought I would show you the threaded core plugs I made for my '29 cylinder block.
The correct plugs are the domed disc plugs you insert and expand with a dent in the center but sometime in the past the previous owner had elected to tap these holes for 5/8" BPT plugs which had to be drilled out in order to gain access to the corrosion plugged cooling channels in the block. I got about a cup of rust out of the block.
I modified two modern plugs to resemble the large core plugs already in the block so that they would not look out of place.
Fiddly work but I am pleased at how they turned out.
Stephen
Nice job- originally there were no plugs fitted here and this modification is very useful in keeping the block clean in this area.
Mine are fitted with square head taper plugs - hopefully easier to remove.
Cheers Tony.
Only two (front and back) Cylinder End Plugs BC 14 (with washers BC15) ever listed for the Cylinder monobloc.
The extra plugs are a popular modification
Cheers, Tony.