Galvanic Corrosion?

[xdfarrx]

Thanks....

[psychos2]

i deal with this all the time at work.the only time it seems to be an issue is with race fuel. we have many boats that we service with aluminum heads. and have only had problems with the boat that runs race fuel all the time. there is something in the fuel that causes corrosion. that is the only one that we put never seize on the plugs. we use NGK spark plugs. shawn