Either due to the vehicle being topped up with just water when it is showing low on the coolant tank or because the antifreeze is just old and needs replacing. They protect your engine from damage caused by freezing conditions while also sealing it during manufacturing That engine has now developed a leak at the rear core plug (yes the core plug is new)
Freelander 1 - FL1 TD4 Core Plug Leaking | LandyZone - Land Rover Forum
It is in a rather inaccessible place, so i'm considering the use of a stop leak to remedy it
However i don't want to gunk up the heater core or discolor the antifreeze
I was thinking about gm cooling system tabs, but would consider other alternatives. This is a newly rebuilt engine with zero hrs I tried to driving a punch on the top side of the core plug. Freeze plugs, also called core plugs or expansion plugs, are tiny yet vital components of your vehicle’s engine
