[Jake Raby]

This is completely dependent upon if the engine is re- started after the failure, as well as how long the engine runs at stage 3 failure.

Collateral damage is always the determining factor.
That said, please don't let it fail, there's not enough good core components out there, plus to know about the issue, and take chances, is a really sad thing when a failure does occur.

Typically with my reconstructions, since so much of the OE engine is thrown away, away, we only end up needing to replace the IMS shaft during the reconstruction of an engine that failed due to an IMSB. Thats not the case with lesser programs that retain most OE components as a "rebuild".