26-11-2022, 10:28 AM
Hi
I would caution against draining for too long. If the inevitable sludge and sediment is wet it's not too bad, but if it ever dries out in the tiny spaces of the radiator core it is inclined to set hard and never shift again.
I use traditional Bluecol 2 Year (Inorganic Acid Technology IAT) all year round, as much for the corrosion inhibitors as for the frost protection. The inhibitors effectiveness wanes after 2 or 3 years even though the ethylene glycol antifreeze properties carry on working. Whenever I drain and replace with fresh, the old liquid is fairly clean with no rust colouring.
If you live in a fost free climate, you can use coolant additive that just has the corrosion inhibitors.
Some say that antifreeze causes leaks, but to be honest a leak is a leak whatever you fill with.
I would caution against draining for too long. If the inevitable sludge and sediment is wet it's not too bad, but if it ever dries out in the tiny spaces of the radiator core it is inclined to set hard and never shift again.
I use traditional Bluecol 2 Year (Inorganic Acid Technology IAT) all year round, as much for the corrosion inhibitors as for the frost protection. The inhibitors effectiveness wanes after 2 or 3 years even though the ethylene glycol antifreeze properties carry on working. Whenever I drain and replace with fresh, the old liquid is fairly clean with no rust colouring.
If you live in a fost free climate, you can use coolant additive that just has the corrosion inhibitors.
Some say that antifreeze causes leaks, but to be honest a leak is a leak whatever you fill with.