RS 4 Quattro Cabriolet V8-4.2L (BNS) (2008)
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Release pressure fork with the knurled bolt still pulled.
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Repeat the procedure on each valve.
Assembling
Assembly is in reverse order of removal, note the following:
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Make sure all the roller rocker levers seat properly on the valve stem ends and are clipped onto the respective hydraulic adjusting elements.
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Install camshafts. Refer to => [ Camshafts ] See: Camshaft, Lifters and Push Rods/Camshaft/Service and Repair.
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Install the spark plugs.
‹› After installing camshafts, do not crank engine for at least 30 minutes. The hydraulic adjusting elements must seat themselves (otherwise the
valves will seat themselves on the pistons).
‹› After working on the valvetrain and lifters, carefully rotate the crankshaft by hand at least 2 full revolutions before starting to be sure that valves
do not strike the pistons.