Table of contents: Removal ↓ Installation ↓
Removal
Remove the timing belt for the mating drive.
Unscrew the bolt "arrow up" for the rear cover "1" of the toothed belt.
Unscrew the "arrow" bolts and put aside the wiring "1".
Install the "T10094 A" puller on all ignition coils - arrow, remove the ignition coils and simultaneously disconnect the electrical connectors of the ignition coils of cylinders 1...4.
Remove the oil filler cap. Disconnect connector "4" on the Hall sensor "G40". Unscrew bolt "2" for the ground wire and the bolts "arrows" for the wiring. Turn the wiring to the left and remove hose "3" from the check valve.
Loosen the camshaft housing bolts in the sequence "15...2". Carefully lift the camshaft housing. Mark the alignment of the valve lever with the hydraulic compensator roller for reassembly. Remove the valve lever with the roller together with the hydraulic compensator and place it on a clean lining.
Installation
Replace the camshaft bearing housing bolts. Seal open engine parts. Remove any remaining sealant from the cylinder head and camshaft housing. Clean the mounting surfaces; there should be no oil or grease on them. Insert the locking pins "D" of the camshaft lock "T10016" into the gauge holes in the camshaft bearing housing as far as they will go as follows: through the locking hole of the intake camshaft gear "C". Through the locking hole of the exhaust camshaft gear. The handles of the locking pins should be at the same height "line A". Push the holder "B" into the intake camshaft gear as far as it will go.
Check in each case whether the rocker arm fits correctly on the end of the valve stem "1" and whether it is clipped onto the hydraulic compensator "2".
Caution! Risk of blocking lubrication system channels due to excess sealant. Sealant beads must not be thicker than the prescribed size.
Apply a uniform thin layer of sealant to the areas marked in the figure by hatching the clean sealing surface of the camshaft bearings.
To guide the camshaft bearing housing, screw 2 threaded pins M6x70 "arrows" into the cylinder head.
Caution! Risk of leaks from oil residues. When installing the camshaft housing, make sure that there is no oil on the mounting surfaces.
Carefully place the camshaft bearing housing vertically from above onto the threaded pins and the dowel pins in the cylinder head. Make sure that the camshaft housing does not become skewed. Tighten the camshaft housing bolts. After installing the camshaft housing, allow the sealant to dry for approximately 30 minutes. Install in the reverse order, while installing the rear cover for the toothed belt. Install the toothed belt for the coupled drive.