Almost every rear engine bus fire is caused by lack of maintenance. The hydraulic actuated fans run engine oil, from the same pump as the power steering.
When the hydraulic actuated fan motors front seal starts to leak, it sprays hot oil into the fan, that then blows the oil all over the hot turbo and exhaust manifold.
We run just under 100 rear engine buses in both Bluebird and Thomas.
To date, due to our diligent maintenance, we have not had a single bus fire in our fleet of over 400 buses.
"Don't argue with stupid people. They will just drag you down to their level, and beat you up with experience."
Patently waiting for the apocalypses to level the playing field in this physiological game of life commonly known as Civilization