Audi AMB Service Manual page 154

ENGINE 1.8 Liter 4-Cyl. 5V Turbo Engine Mechanical, Engine Code(s): AMB
Hydraulic valve lifters, checking
Special tools, testers and auxiliary items required
Feeler gauge
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Wooden or plastic wedge
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NOTE:
Hydraulic valve lifters cannot be repaired.
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Irregular valve noises when starting engine are normal.
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Work sequence
Start engine and run until coolant temperature reaches approx. 80 °C.
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Increase engine speed to about 2500 RPM for 2 minutes, if necessary perform test drive.
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If hydraulic lifters are still noisy, locate faulty lifters as follows:
Remove cylinder head cover --> Cylinder head cover, removing and installing.
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Rotate crankshaft until lobes on cams of lifters to be checked are pointing upward:
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Vehicles with manual transmission:
Push vehicle forward with 4th gear engaged and ignition switched off.
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Vehicles with automatic transmission:
Remove sound insulation and turn crankshaft clockwise by applying wrench to central bolt on crankshaft
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sprocket.
Measure play between cam and valve lifter.
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Fig. 212: Pressing Valve Lifter Down With Wooden Or Plastic Wedge
Courtesy of VOLKSWAGEN UNITED STATES, INC.
2005 Audi A4 Quattro
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