Can anyone help? Had bottom end rebuild done by Middlehurst 400 miles ago + new steel turbos. Running in at present...600 miles to go & counting. When I start the engine from cold I get a squeal from engine bay that is reminiscent of a failing "Mini" water pump from circa 30 years ago! It lasts at most 2 seconds. I will obviously mention it to Middlehurst when it goes back in for oil change..but in the meantime any ideas???