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To news overview © RN365/Michael Potts

Both Red Bull and Aston Martin have suffered major reliability issues on the first morning of F1's second pre-season Bahrain test.

Isack Hadjar's running in the RB22 has been limited due to a water leak in his Red Bull Powertrains engine, limiting him to just 13 laps as the team try to fix the problem and get him back out to complete his full day in the car.

As for Aston Martin, Fernando Alonso was limited to just 28 laps across the first three hours of the morning session after his machine developed an engine problem.

Whilst the immediate cause of Alonso's ailment was not immediately clear, it was reported on the world feed showing testing coverage that the borescope had been brought into the garage for inspection of the Honda engine.

Elsewhere, Cadillac's Sergio Perez also encountered problems, limiting him to just two laps for over two hours of the session.

Fortunately, he emerged from the pits in the third hour and began to produce solid laps, although was 7.153s off the pace of Charles Leclerc.

Full coverage of testing is available to view via our live blog, available here!

Also interesting:

Join RacingNews365’s Ian Parkes, Sam Coop and Nick Golding as they look back on last week’s first test in Bahrain and this week’s second test at the same venue. The trio debate Max Verstappen’s criticism of the regulations and whether Formula 1 is facing an identity crisis.

Rather watch the podcast? Then click here!