A6 Quattro Wagon V6-3.2L (BKH) (2006)
Lifter / Lash Adjuster: Testing and Inspection
Hydraulic Adjusting Elements, Checking
‹› The hydraulic adjusting elements cannot be repaired.
‹› Irregular valve noises are normal while starting the engine.
Special tools, testers and auxiliary items required
‹› Feeler gauge
Procedure
-
Start the engine and let it run until the radiator fan has switched on once.
-
Increase engine speed for about 2 minutes to approximately 2500 RPM, perform road test if necessary.
‹› If irregular valve noises disappear but reappear during short drives, oil check valve should be replaced. Oil check valve location: In oil filter
housing - through 04.2005 => [ (Item 6) Oil filter housing ] See: Engine Lubrication/Oil Filter Housing/Service and Repair/Oil Filter Housing
Assembly Overview, from 05.2005 => [ (Item 7) Oil filter housing ] See: Engine Lubrication/Oil Filter Housing/Service and Repair/Oil Filter
Housing Assembly Overview.
If the hydraulic adjusting elements are still loud, determine which element is faulty:
-
Remove the cylinder head cover. Refer to: Left => [ Left Cylinder Head Cover ] See: Cylinder Head Assembly/Valve Cover/Service and
Repair/Left Cylinder Head Cover, right => [ Right Cylinder Head Cover ] See: Cylinder Head Assembly/Valve Cover/Service and Repair/Right
Cylinder Head Cover.
-
Rotate crankshaft until lobes on the adjusting element to be checked face upward:
‹› Manual Transmission with 4th gear engaged an ignition switched off, slide forward.
‹› Vehicles with Multitronic transmission or automatic transmission 09L: Rotate crankshaft clockwise at ribbed belt pulley center bolt.
-
Check play between cam lobes and roller rocker lever.
-
Press roller rocker lever down with screwdriver - arrow -.
If a 0.20 mm feeler gauge can be inserted between camshaft and roller rocker lever:
-
Replace the hydraulic adjuster. Refer to => [ Camshafts ] See: Camshaft/Service and Repair.
‹› After installing the camshafts, the engine may not be started for approximately 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
