Where are the frost plugs on a 1.7 dti astra van?

On a 1.7 DTI Astra van, the frost plugs, also known as core plugs or freeze plugs, are typically located on the engine block. They can be found on both the left and right sides of the engine, usually near the cylinder head. Their primary function is to prevent coolant from freezing and causing engine damage. When troubleshooting or inspecting, it's important to check for signs of leaks or corrosion around these plugs.