Vettel: Loose screw led to extinguisher issue
27 October 2017 – Sebastian Vettel believes that a loose screw was to blame for his fire extinguisher going off during the second practice session for the Mexican Grand Prix.
Vettel slowed in his SF70-H and expressed discomfort via the radio, before returning to the garage for a change of overalls, prompting a delay prior to his next run.
He ultimately placed fourth overall, 0.250s behind Daniel Ricciardo, on his second Ultra Soft lap, having abandoned his first effort when he shot wide through Turn 11.
When asked what went wrong in the cockpit, Vettel commented: "I don't know… some screw went loose, or came loose.
"Obviously the pressure found its way out, which wasn't that pleasant for me – a bit of a cool down!
"I think our car is fine, [but] we didn't get a smooth session, with the extinguisher bursting."
On his day, Vettel said: "It was so-so, I was stuck in a lot of traffic.
"I think it was the same for everyone, it's a short track and with all the cars on track it's always tricky.... it was OK, but we need to improve."
Kimi Räikkönen, meanwhile, placed fifth, with the leading three teams closely matched.
"It was a pretty normal Friday and for sure we can improve," said Räikkönen.
"You always hope that everything is straightaway exactly perfect, but that's never going to be the case."