Magnesium is a whole different animal from aluminum. Even though at first glance it may look the same, it is about 30 percent lighter. Reduced weight translates into increased fuel economy. But one of the biggest differences though, is it is much more susceptible to corrosion and the corrosion is more difficult to neutralize or keep in check. If you put bare steel next to magnesium it can corrode very quickly with deep pitting as a result. So specific fasteners have to be used to secure magnesium parts to an automotive engine. When exposed to air and moisture flakey white powder quickly forms. Kent does not like it and thinks it is ugly. In part one of this series he applies three different products to the valve covers and intake manifold on a Mercedes M113 V8 engine. He will report back in 3 to 6 months to let you know which if any of these products helps stop this white powdery corrosion.
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