With one of the bodyside doors opened up, the engine of 31289 is revealed with its English Electric plate attached. These English Electric 12SVT engine (as used in the class 37) are de-rated to 1,470 bhp and were retrospectively fitted from 1964 following dreadful reliability problems with the Mirrlees JVS12T 1,250 bhp units that were installed from new. A situation all too typical of the time with many rushed and botched modernisation plans.
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