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Heater core replacement


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I thought I only had an idle problem with my old girl but she blew the heater core too...

I removed the old one and it is aluminum with plastic tanks/sides. I am curious, the local parts shop here has one that is copper ($40) and one for $80. and I am guessing aluminum for the latter one.

Can I put a copper one in or should I stay with the aluminum one? Are there any issues with a mixed system as of course, the engine block is aluminum?

Thanks for your feedback,


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