Ferrari has not commented publicly on the checks before, but when asked by Autosport about that investigation, the Italian team's technical director Mattia Binotto said: "Obviously the power unit is a complex element, it has been since 2014".
Immediately after the finish Mr. Hamilton said Ferrari was aided by "a few trick things on the car" that enabled Mr. Vettel to fly past him on the straight.
Raikkonen is enjoying his best season for years in 2018, but despite an improved turn of speed across the first half of the season, he has missed out on pole on several occasions because of little mistakes when it mattered. I was lucky to get second instead of third.
And setting the scene for a three-way fight at Monza, Sebastian Vettel has insisted he expects Scuderia team-mate Kimi Raikkonen to be allowed to fight him for the win.
But how will Vettel and Raikkonen play it into the first corner, with Hamilton lurking behind? Fourteen of the last 18 pole-sitters here have gone on to take the chequered flag. It was soon clear that the main contest was the battle between Ferrari and Mercedes, with Vettel and Hamilton leading the way.
Raikkonen was one-tenth of a second faster than both Vettel and Hamilton.
"This is a great team and we are happy with how it is going", Camilleri said.
But Alonso has to report to the stewards to explain an incident when he tangled with Haas' Kevin Magnussen at the first chicane as they both disputed the same piece of track at the end of the second session.
The Racing Point Force Indias of Esteban Ocon and Sergio Perez were best of the rest, with the former lapping 1.825s off the pace and just 0.012s quicker than his team-mate. The close competition is great for the sport, and it is pushing us to limits that we didn't even know we could go to.
The Finn became the oldest polesitter in F1 since 41-year-old Nigel Mansell headed the field at the 1994 Australian Grand Prix and secured the fastest lap in F1 history (see video below).
His wife, Minttu, was moved to tears by the result in the Ferrari garage.