Welsh plugs, also known as freeze plugs or expansion plugs, come in various sizes to accommodate different engine block openings. Common sizes range from about 0.5 inches (12.7 mm) to 2 inches (50.8 mm) in diameter. The specific size required typically depends on the engine manufacturer and model, so it's essential to consult the vehicle's specifications or a parts catalog for the correct fit.
Welesh plugs are cheaper to machine, everything about building a car is about price.
If your asking about FREEZE OUT PLUGS then it has 8 of them.
They are all different sizes.
A male horse comes in many sizes. They can be ponies. They can be welsh size. They can be the huge Clydesdale horse.
There are butt plugs in different sizes. You start with the smallest one.
25mm
To change the welsh plugs (also known as freeze plugs) on an Opel Corsa Lite 1.3, you typically need to remove the engine components that obstruct access to them. This often includes the intake manifold and possibly the exhaust manifold, depending on the specific design of the engine. Additionally, you may need to drain the coolant and remove any associated hoses or components to ensure a clear working area. Once accessible, the old welsh plugs can be pried out and replaced with new ones.
a welsh plug is a plug in the side of the block and the heads. these fill the holes left after casting.they actually allow the sand to be removed that is used during casting so as you have a hollow block which allows for the water jackets. in the USA these welsh plugs are called freeze plugs. they really do not stop the coolant from damaging the block if coolant freezes they are specifically to block the casting holes
Sounds like welsh plugs to me... but without knowing what the car is makes it hard.
I have a 1996 Chevy astro w/ 4.3 L vortec... these plugs fit that motor.
For plugs that can be adjusted the NGK catalogue states 0.8mm for all engine sizes of 405.
Vauxhall Vectra core plugs, also known as freeze plugs, typically come in various sizes depending on the engine model and year. Common sizes for Vectras range from 30mm to 40mm in diameter. It's important to check the specific engine specifications or consult a service manual for the exact size required for your vehicle.