Heater Matrix Removal - Quick question

[vlj]

So cut the pipe at the connection, the bung has around 4-5cm of pipe I think I've got a picture of mine. Cut that and then before connecting the new pipes use sillicone grease as it preserves the rubber, and using it means the pipes wont expand or 'deflate', it keeps them constant (what you want when theres hot and cold coolant running through them).