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Cracked spark plug "sleeves"


Vehicle Information: Year: 2000; Engine (type, size, modifications): 3.2 stock; Total Mileage: 30000;

I am having the 30k service on the 2000 Boxster S I recently purchased, which is just out of warranty. When replacing the plugs, the mechanic advised me that a few of the plastic "sleeves" that the spark plugs fit into were cracked and broken; it affected both sides of the engine. Both valve covers needed to be removed and the pan dropped to replace the "sleeves" and fish out the bits of plastic, at considerable time/expense. Have you heard of this happening and what would be the prudent repair.Many thanks,

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