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. That engine has now developed a leak at the rear core plug (yes the core plug is new) 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 They protect your engine from damage caused by freezing conditions while also sealing it during manufacturing However, when freeze plugs pop out, they can lead to coolant leaks, engine overheating, and costly repairs if not addressed promptly.
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