Test pressurization of the charge air cooler and pressure pipes, V6
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Test pressurization of the charge air cooler and pressure pipes, V6
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1.
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Remove the engine cover.
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2.
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Detach the turbo's bypass pipe from the intake pipe.
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Note
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There is an O-ring at the bypass pipe mounting on the inlet pipe.
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3.
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Remove the turbo pressure hose from the throttle body.
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4.
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Remove the front exhaust manifold's heat shield.
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7.
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Connect the pressure/vacuum pump,
30 14 883 Pressure/vacuum pump
, to the charge air bypass valve. Build up a pressure of approximately 1 bar.
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Important
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Be extremely careful when pressurizing the turbo system. Too high a pressure may damage hoses and connections.
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8.
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Connect a compressed air gun to the pressure gauge equipment,
83 93 514 Boost pressure gauge
, and carefully build up a pressure of approximately 1 bar.
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9.
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Make sure that the pressure does not drop by more than 0.1 bar in 30 seconds. If the pressure drop is greater than this or if there is an audible hissing sound, check hoses, pipes and connections for leaks.
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10.
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Check the hoses/pipe and compressed air gun for leaks using leak detection fluid part no. 30 20 385 or similar.
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11.
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If no leak is found in the hoses or pipes, carry out test pressurization on the removed charge air cooler.
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13.
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Fir the inlet and outlet hoses on the charge air cooler and plug one of the hoses. Connect the pressure measuring equipment to the other hose.
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14.
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Connect a compressed air gun to the pressure gauge and carefully build up a pressure of about 1 bar.
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15.
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Check that the pressure does not fall by more than 0.1 bar in 30 seconds. If the pressure drop is greater than this or a hissing sound is heard, check the hoses, pipes and connections for leaks. Use leak detection fluid, part No. 30 20 385, or similar.
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1.
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Attach the charge air cooler. See
Charge air cooler, V6
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Important
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To reduce the risk of hoses mounted on the delivery side of the turbocharger coming loose due to low friction at high air pressure, the hoses and connecting pieces must be cleaned thoroughly before fitting. Use a rag dampened with 93 160 907 Motip Dupli cleaning agent to wipe clean inside the ends of the hoses. Clean the connecting pieces as well. If hose clips are rusty or damaged, they must be replaced so the correct clamping force is maintained.
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2.
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Connect the turbo pressure hose.
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4.
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Fit the front exhaust manifold's heat shield.
Tightening torques:
Stud 22 Nm (16 lbf ft)
Locknut 24 Nm (17 lbf ft)
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5.
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Fit the turbo bypass pipe.
Tightening torque: 8 Nm (6 lbf ft)
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Note
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Fit a new O-ring greased with non-acidic vaseline.
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