(30 Jun 2015, 5:21 pm)buss14 wrote well the pacer that broke down had quite a lot of liquid pouring out of the engine

Probably just overheated or something.
Buses do exactly the same, throw coolant out etc.

Out of interest the York Potash mine near Whitby was approved today, so this will see them fund a 2nd unit for the Middlesbrough-Whitby service to be doubled.