i reckon use hydro acid first, let it soak overnight, then rinse well, soak in petrol for an hour or 2 and then rinse extremely well.. then your coolant bottle should be as good as new, also its a good idea to flush your radiator and piping before you clean it, as i didnt and now i got brown stuff in it again!!!!!

A cooling system flush every year is a good idea, and especially when trying to clean the bottle.

I'm going to see if i've got time on sunday to give mine a good clean, i'm tired of it looking so old & crappy. It really lets the engine bay down.

Cheers

ToranaGuy

sweet post some pics so i can see how ya went

I posted some pics and a small write up in my build thread about this. Didn't come out too badly in the end.

I gave mine a clean with some concentrated spary & wipe stuff i bought at bunnings, and got a lot of the crap out of the bottle, but there was some left in it, so i left it soaking the night before the last, and i'll be home tonight to have a look at the results.

I'll post up some pics later.

Cheers

ToranaGuy

Hey guys. I havnt tried it on the washer bottles but metho and rice and shake works really well on most dirty things I use it on. Pyrex Water pipes and glass ones and stuff along the likes.
Ill give it a go on the tank when I do my coolant next

i use the stuff i get from work that i use to strip tiled floors
its called ceramic tile plus.it does a dam good job im unsure if it can be brought retail

saw the thread and thought id have a go considering mine was filthy !, used degresaer, boiling water and bleech, with a good shake n sit came out alrite, will do it again another time this was just while i was at work so just a quick job at that !

bunnings

'borrowed' some pool HCl off dad, worked awesome! now to finish flushing and refilling...