Coolant Advice

[chrispitman]

Now the cars running need to do a coolant change. Whats the best hose to take off to drain it.

Next - what coolant see people on here using 2y blue. My current is orangey/pink pretty sure it was from halfords but cant find paperwork or bottle so not 100% sure. Seems some dont recommend with bright metals pulled the block temp sensor looks fine. No leaks so far.

Is there a coolant thats bright metal safe other than blue 2yr. If I switch to this assume I will have to flush a few times with clean water should this then be ok.

[chrispitman]

Yes been reading on google its a total mine field, seems Oat based dose not attack bright metals but gives no real protection
(but brass seems unaffected looking at my system) only bit I can't find answer to is solder as rad is std copper/brass soldered together, but again no leaks.

Has anyone used a 'Hoat' based coolant as these were developed before oat, and looking at some versions they list cover for Ali,copper,brass,solder. But you get the better protection of Oat vs blue IAT and lastst longer like 5 year of Oat vs 2 IAT. Also Oat/Hoat dosen't leave as many deposits as IAT in the cooling system.