Pressure testing of the charge air cooler and delivery pipe, A20NFT/LHU
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Pressure testing of the charge air cooler and delivery pipe, A20NFT/LHU
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Important
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Exercise great care when pressurising the charge air system. Too high pressure can damage the radiator, hoses and connections.
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1.
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Remove the upper engine cover.
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2.
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Remove the charge air pipe (A) from the turbo
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4.
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Detach the charge air hose from the throttle body.
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7.
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Connect an air gun to the charge pressure meter's T-coupling.
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8.
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Carefully create a pressure of around 1 bar.
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9.
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Check that the pressure does not fall more than 0.1 bar in 30 seconds. If the pressure drop is greater or if hissing can be heard, then check the hoses, pipes and connections for leaks. Use soap water or similar to detect any leaks.
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1.
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Release the pressure and remove the charge air pressure meter.
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2.
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Remove the plugs from the charge air pipe hoses.
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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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3.
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Fit the charge air pipe (A) between the turbo and the throttle body.
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4.
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Fit the upper engine cover.
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