Engine "reconditioned" by Porsche

[Paul]

My understanding is that Porsche does not rebuild and return your motor, but rather provides a factory rebuilt motor that was returned earlier by another customer. This is done to reduce downtime. The motor is rebuilt to new tolerances.

[BYprodriver]

Originally Posted by Paul

My understanding is that Porsche does not rebuild and return your motor, but rather provides a factory rebuilt motor that was returned earlier by another customer. This is done to reduce downtime. The motor is rebuilt to new tolerances.

Not the cylinders.

[PaulE]

Originally Posted by BYprodriver

Not the cylinders.

I read somewhere once where I believe either Jake Raby or Charles Navarro took apart some "factory rebuilt" M96 engines and that person reported all of these engines had new cases. Whoever that was said it was because there was no way to make the cylinder bores in the used engine cases perfectly round again because of the cylinder bore coating (alusil?) and how it wears. Of course I can't find that article now.

[BYprodriver]

Originally Posted by PaulE

I read somewhere once where I believe either Jake Raby or Charles Navarro took apart some "factory rebuilt" M96 engines and that person reported all of these engines had new cases. Whoever that was said it was because there was no way to make the cylinder bores in the used engine cases perfectly round again because of the cylinder bore coating (alusil?) and how it wears. Of course I can't find that article now.

Yes, if the cylinders were obviously worn too much they would replace the cases.