Jenson Button: Montreal pole possible despite Friday practice problems

The McLaren driver missed all but the last 15 minutes of the afternoon practice session thanks to the problem, and wound up ninth fastest after completing just 14 laps.

However, Button is adamant that he will not sacrifice a shot at pole position by focusing on high-fuel runs rather than qualifying simulations during the third and final practice session on Friday morning.

"We have information on running high fuel. For me it's still important to run low fuel and get a feel for the tyres, because when we ran it was cold, different to what it will be in qualifying," he said.

"I'm looking forward to it, I really am. It wasn't the perfect Friday, but we've done worse. We do have some data now from today, and hopefully we can look at that and make some improvements for tomorrow."

While he remains optimistic, Button did admit that the lack of running was far from ideal.

"It hurts, because you can't do any high-fuel running, and you can't do any set-up work. Also, we didn't do the set-up work on the car. When you change gearbox, you have to make sure all the toes are right, all the cambers are OK and it's all pointing in the right direction. We obviously didn't do that because we had to get back out on the circuit. So, we have to see where the car is now.

"We can still have a good weekend. We are still positive. The car's quick; Lewis [Hamilton] did a good job today, he was very fast. So I'm not worried."