At 05:26 PM 8/3/99 -0600, you wrote:
>I believe most aftermarket heads are cast from A356 aluminum but I'll check
>that. All you metallurgy enthusiasts can dig into the thermal expansion,
>corrosion resistance, and thermal conductivity properties as deep as you like.
>
>The Japanese and Europeans (except the Italians) figured out how to cast
>aluminum and build engines with it (including iron blocks and the associated
>electrolytic/thermal expansion issues) long ago. Why would it be a problem
here?
>
>Theo Smit
...
>> I talked to an old Mercury outboard repairman and he
>> stated that Mercury had added copper to their aluminum alloy
>> to make the alloy easier to cast. This copper within the
>> alloy caused self electrolis of the casting when in contact
>> with water. Susposedly Mercury finally changed the alloy
>> to solve the problem. My guess is that the head manufactures
>> are more interested in low cost casting than long life alloys.
>> James Barrett Tiger II 351C and others
Theo,
Apparently on 1983 3.8L V6 Ford still hadn't figured it out.
James Barrett Tiger II 351C and others
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