An overnight investigation by Mercedes has determined that Nico Rosberg’s issue in FP3 at Monza was caused by a coolant leak that contaminated the engine.
The problem forced Rosberg to make a hurried switch back to the older spec engine for aualifying, a move that contributed to him only making fourth spot.
A team spokesman told this writer that it was too early to determine whether Rosberg’s orginal upgraded engine will still be useable at a future event.
The team had been concerned that it would find something that might compromise Lewis Hamilton’s Sunday. However it is confident that there will not be a repeat, and nothing is being changed on the World Champion’s car as a result of the investigation.
The part design that failed has well proven and had been in use for some time, and was thus not associated with the Monza upgrade package.