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replacement heater core 900 1998

posted by  Steve on  Tue Sep 6 07:41 CST 2016
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last visit: Fri Oct 24 07:16 CST 2014
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Just a thought about brass-solder heater cores... You really need to pay attention to coolant quality when you use them. The normal Prestone Green does not treat them well (silicates tend to precipitate out and cause localized corrosion at solder joints); orange Dexcool is not good. Volvo C is a good choice as is Zerex G-05 but those are really engineered for the aluminum composite systems, not the older brass-lead solder. I just wonder what Volvo OEM heater cores look like. Ours are original, going on as old as 27 years, with no leaks thanks to rigorous use of Zerex G-05 and distilled water. We don't live near the seashore, either.






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