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I have been doing a **************** load of reading on the IMS failures. My Boxster is a 1998 with the 2.5 engine. It is my understanding that the 1998 2.5 Porsche engine had dual row bearings and due to this design (though also flawed) there was a much lower rate of IMS failure.
Though I'm not sure this will be my cars savior, it has had its oil changed yearly no matter what the miles put on the car.
The car has 27k miles on it at this time. It has been kept in a heated garage (healthier on the seals).
Bad news is its second owner (for the past 3 years) has been an older lady. From talking to her, the car has been driven gingerly (not good from what I've gathered).
I would like to wait 3-4k miles (1 year of driving) before changing out the IMSB and clutch.
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