22-05-2024, 08:07 PM
Core plugs are 3/4" and 1 5/16" as per references below:
https://www.theaustinsevenworkshop.com/p...g-knock-in
https://www.theaustinsevenworkshop.com/p...g-knock-in
As you know, they are precisely made in a dished form so they can be knocked into place and seal - this needs a malleable material like mild steel. To reduce corrosion I have known them to be 'tinned' with solder prior to fitting, but those in my engine have done over 20 years already without tinning.
https://www.theaustinsevenworkshop.com/p...g-knock-in
https://www.theaustinsevenworkshop.com/p...g-knock-in
As you know, they are precisely made in a dished form so they can be knocked into place and seal - this needs a malleable material like mild steel. To reduce corrosion I have known them to be 'tinned' with solder prior to fitting, but those in my engine have done over 20 years already without tinning.