Step By Step Guide To Flushing Coolant

[PAV34]

Hi Guys,

im looking for a step by step guide to flushing coolant, re filling etc. the whole deal.

Did a search but cant find a guide.

I noticed the coolant bottle was empty and i heard if you dont know what coolant you used before, using another when you top up could create a jelly and clog you radiator.

anyone help??

Thanks.

[Craved]

you could empty your radiator, then fill with water mixed with a flushing agent, then drain and fill up as normal.

there is a drain plug on passenger side of the radiator, undo that (or the bottom hose)

fill the rad to the top with your water/coolant mix.

then start the car with the heater on.

let it run for a while and the coolant level will drop, keep filling it up as it drops...

once the car is up to temp. put the cap on the radiator, and then bleed the system further using the bleed point at the front of the plenum. 12mm bolt with a heta warning sticker.

open that and let the bubbles come out, once no more bubbles come out, tighten it up and away you go.

[PAV34]

i should only use distilled water??

what flushing agent do i use??

which coolant do you all recommend? Nissan stuff?

Edited May 19, 2006 by PAV34

[Greg]

I believe there is also a welsh plug on block, if you want to do a complete drain.

[Craved]

i should only use distilled water??

what flushing agent do i use??

which coolant do you all recommend? Nissan stuff?

distilled water = im on tank water so i dont have the nasties from normal tap water, so i would suggest yes if you can afford it

flushing agent = is like a nulon or something (small bottle like octane booster injector cleaner etc) ... you dont have to do this. if you look in the radiator cap and see lots of rusty coloured gunk. either use a high pressure hose, or pay a radiator place to flush the radiator (if temps are an issue this would be recommended)

coolant = i run the green Nulon concentrate, running to about 30% mix . note the more coolant you use the less heat transfer the fluid has, but higher boiling point.. so more does not mean it will cool better.