Fuel over-filling the coolant tank and present in engine oil. Approx 125000 miles on the motor. Does this require head removal to diagnose? Are injector sleeves and fuel cups both terms for the same thing? Can the old sleeves be removed and replaced without removing the heads? Is there some maintenance I missed to cause this problem? Does driving style cause this problem? Can fuel additives either prevent or hasten the development of this problem?
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