Pirelli has clamped down on enforcing the operating guidelines of its tyres, amid rumours some teams were not playing along.
After the tyre-exploding British grand prix this year, the FIA backed Pirelli's move to force teams to stay within certain operating guidelines.
The guidelines set strict limits on things like tyre camber and pressures, but also pre-session tyre heating, according to Germany's Auto Motor und Sport.
The report said teams were not allowed to 'boost' temperatures in their respective heating systems beyond 110 degrees for one hour.
But a Force India team member is quoted as saying: "The heating systems are easily manipulated. If you boost more than allowed, you have...
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