McLaren F1 squad limited running on the fourth day of the first test was due to a “relatively minor” trouble, according to the team.
A coolant leak in the morning prevented the Spaniard from posting a representative time.
Fernando had enjoyed a successful first day behind the wheel of the MP4-31 earlier this week, completing 119 laps on Tuesday with no issues to already log more mileage than he managed in all of the 2015 pre-season.
McLaren-Honda teammate Jenson Button had been sidelined for much of Wednesday with a hydraulic issue, and the team fixed the issue before Thursday morning.
“Today was disappointing after starting the first couple of days of the test so positively,” Alonso said.
“Still, it’s good news that although the issue we had on the car meant we had to miss a lot of today’s running, it’s not a major problem and will be fixed in time for next week’s test.”
“Overall, we’ve managed a good number of laps during this test, which means we have a lot of data to analyse and learn from,” Alonso said.
“Over the weekend we’ll work hard to get everything prepared for next week, with the aim of getting as much time on track as possible.”
McLaren Director of engineering Matt Morris make clear that a coolant leak simply took a long time to access in order to be able to resolve.
“Unfortunately, the coolant leak we experienced on the car today was in a tricky position, which meant it took longer than usual to locate and fix,” Morris said.
“It’s always frustrating when a small issue hampers your running for much of a day, but thankfully it’s relatively minor and we can now look to preparing the car for the second test on Tuesday. Testing is testing, and it gives us the opportunity to identify and work on reliability issues before we start the season.
“Over the course of the first four days in Barcelona we’ve done a good amount of running and already learned a lot about our package, which should stand us in good stead for next week. We’re definitely ahead of where we were last year in terms of system checks and integration, so at the second test we’ll be able to focus more on race simulations and setup, as well as characterising our package’s performance.”
“We have a lot of data to go through over the weekend, and we look forward to getting back on track next Tuesday and continuing to get as much mileage under our belts as possible ahead of the first race in Australia.”
McLaren racked up a total of 257 laps completed, of which 203 were collected over the first two days of the test.