Withdrawal
Remove the toothed belt for the associated drive.
Unscrew bolt -arrow above- for rear cover -1- for toothed belt.
Unscrew bolts -arrows- and lay wiring -1- aside.
Fit puller -T10094 A- to all ignition coils -arrow - Pull out ignition coils and at the same time disconnect electrical connectors for ignition coils for cylinders 1...4.
Remove the oil filler cap. Unplug connector -4- at Hall sender -G40-. Remove bolt -2- for earth wire and bolts -arrows- for wiring. Turn the wiring to the left and remove the hose -3- from the non-return valve.
Loosen bolts of camshaft housing in sequence -15...2-. Carefully raise the camshaft housing. Mark for reassembly the alignment of the valve lever with the hydraulic compensator roller. Remove the valve lever with roller together with the hydraulic compensator and place it on a clean pad.
Installation
Replace bolts for camshaft bearing housing. Close exposed engine parts. Remove sealant residues on cylinder head and camshaft housing. Clean the landing surfaces; they must be free of oil and grease. Insert locking pins -D-camshaft lock -T10016- as far as they will go into the calibration holes in the camshaft bearing housing as follows: through the locking hole in the intake camshaft gear -C-. Through the fixing hole of the exhaust camshaft gear. The locking pin handles must be at the same height -line A-. Push retainer -B- into inlet camshaft sprocket as far as it will go.
In each case, check whether the rocker arm on the end of the valve stem -1- fits correctly and is clipped onto the hydraulic compensator -2-.
Carefully! Danger of clogging of the channels of the lubrication system with an excess of sealant. Sealant beads must not be thicker than the prescribed size.
Apply an evenly thin layer of sealant to the areas marked in the figure by the hatching of the clean sealing surface of the camshaft bearing surface.
To guide the camshaft bearing housing, screw 2 grub screws M6x70 -arrows- into the cylinder head.
Carefully! Danger of leaks from oil residues. When fitting the camshaft housing, ensure that the seating surfaces are free of oil.
Carefully slide the camshaft bearing housing vertically from above onto the grub screws and dowel pins in the cylinder head. Make sure that the camshaft housing is not warped. Tighten the camshaft housing bolts. After installing the camshaft housing, allow the sealant to dry for approximately 30 minutes. Installation is in reverse order, while installing the rear cover for the toothed belt. Install timing belt for associated drive.
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