Hi Beno. Welsh plugs are used to keep water in your engine and are either steel or brass depending on choice. Some engine builders still use the steel ones from long ago. Younger engine builders like the brass copper ones as many engines now run radiator additives which they feel are less corrosive on then then on the steel ones. Personal choice really, anyhow, you need to use one or the other to fill the holes in your block created from when the molten metal was poured into moulds to make the engine. Fitting them requires some wet sandpaper to clean the hole, a steel or brass welsh plug that tightly fits the hole a socket of about two thirds of the size, some lock tight to seal the water jacket and a hard engineering hammer. Coat the welsh plug with the sealer, place in hole opening and using the socket gently tap the plug about half way into hole check it’s going in ok then a few more taps with socket finish fitting by gently tapping around the outside of the welsh plug until it sits flush with the block. Repeat method until all holes are filled to keep the coolant in your engine and on some engines a similar plug is used in the rear to keep oil in the engine.
Topic: 1980 Cali rebuild.... Let the games begin (Read 6502 times)
