12-02-2021, 09:58 AM
From that thermal image of the radiator, it looks to me like the left-hand side two-thirds of the bottom tank is completely blocked. Flushing through is just going to clear the right hand side (which looks clear anyway), as the intake is on that side of the system (so heat is the only means of creating significant flow on the left-hand side). If the core looks externally to be in good condition it might be worth removing the bottom tank, otherwise it looks like a new radiator.