Cooling system flush recommendations please

[Girvs]

I could be wrong but I thought the series 2 A80 got an aluminium heater core, although I wouldnt be surprised if the series 1 was copper.

I seem to recall they did the same thing with the radiator so its pretty likely.

Series 1 copper (for RZ, GZ, RZ-S), SZ and SZ-R got Ali. Series two got Ali for all models.

Love Toyota's consistency :S

[Mr Ree]

Its called evolution...

Oh and quite possibly the rising price of copper

I ended up using the prestone flush, and spent a few hours first, making sure every single drop of old coolant was out before I added the flush into the system. Once I had run it for 20 minutes or so, the colour of what I drained out was as expected, brownish and a bit of grit throughout.

Refilled it and drove it again for 20 minutes, then drained it again and alot more crud came out, so just kept repeating until no more came out.

Then I ripped out my skinny NA radiator, changed the dreaded harmonic balancer to a new one with a new bolt for good measure, then swapped in my new fat TT radiator, and refilled with coolant.

Job done and hopefully no cooling issues in the future when I turn up the hair dryer