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99 Mercury cougar alternator

I have put 4 alternators in this car in 4 years. They just keep going out. I have bought everything from cheap ones to lifetime warranty top of the line ones. I'm told that it is a flaw with the car. the alternator fits in the block and is grounde tothe block. Since it is actually inside a space int he block it overheats. I don't know but I know I'm tried of putting alternators on this ar. Does anyone know of this type of problem and if so what about a fix.


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