Hydraulic Adjusting Elements, Checking
The hydraulic adjusting elements cannot be repaired.
Irregular valve noises are normal while starting the engine.
Special tools and workshop equipment required
- Crankshaft SocketT40058
- Feeler Gauge
Procedure
-- Start the engine and let it run until the coolant fan switches on once.
-- Increase engine speed for about 2 minutes to approximately 2500 RPM, perform road test if necessary.
-- If the hydraulic adjusting elements are still loud, determine which one is faulty as follows:
Danger of personal injury due to the coolant fan turning on by itself.
- The coolant fan can come on even when the ignition is turned off, for example, caused by the heat still in the engine compartment.
-- Remove the cylinder head cover. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING for RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING .
-- Remove the front noise insulation -1-. Refer to NOISE INSULATION, REMOVING AND INSTALLING .
-- Insert the Crankshaft SocketT40058 guide pins as follows:
- The large diameter -arrow 1- faces the engine.
- The small diameter -arrow 2- faces the adapter.
-- Rotate the crankshaft 180° further in direction of engine rotation -arrow- using the Crankshaft SocketT40058 and ring wrench.
-- To determine the play between cam lobes and roller rocker lever, press lever down in direction of -arrow-.
-- If a 0.20 mm feeler gauge can slide between the cam lobes and roller rocker lever, replace the hydraulic adjusting element. Refer to CAMSHAFTS, REMOVING AND INSTALLING .
Final Procedures
-- Install the cylinder head cover. Refer to LEFT CYLINDER HEAD COVER, REMOVING AND INSTALLING for RIGHT CYLINDER HEAD COVER, REMOVING AND INSTALLING for the right side.
-- Install the front noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .