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Staying with the plastic and al rad is a good idea. Copper core rads should offer better heat disappation.
Copper brass type rads introduce a different metal into the cooling system and you already have Cast iron, steel and aluminum. This will speed up the rate of corrosion with the least stable metals, such as aluminum.
With that said, you have to carefully test your coolant's anti corrosion ability more often.
Do a quick PH test and check the voltage (galvanic) by taking a multimeter, (-) end to the battery and (+) probe in the cool coolant, not touching any metal when you do an oil change.
Since it is a new install, you should check with new coolant (with whatever climate mix, eg 50/50, 60w/40coolant) mix.
If you read about +0.1 volts DC or lower, then your coolant is doing good. If you read +0.3 or +0.4 volts DC or more, time to change the coolant.
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2004 RX330 Sport
2003 Cam I4 XLE
2000 Cam XLE Gold Edition V6
1998 CamCE I4 Super Commuter!
Last edited by Hajoca; 12-27-2005 at 11:14 AM.
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