Attention! The turbo boost pressure regulator rod cannot be adjusted.
Remove the turbocharger.
Attention! The test cannot be performed with a turbocharger installed.
Use a magnetic stand with an indicator. the leg of which is installed on the end of the drive rod of the boost pressure regulator valve (as far as possible coaxial with the stem).
Pressurize the pressure regulator air actuator gradually using a vacuum pump.
At a pressure of 331 mbar, the stroke is 1 mm.
At a pressure of 544 mbar, the stroke is 5 mm.