Unscrew bolt -arrow above- for rear cover -1- for toothed belt.
Unscrew bolts -arrows- and lay aside bracket with electrical cables.
Remove non-return valve -1- from oil filler neck -2- -arrow A- and set aside. Unlock lock -arrow B-, turn oil filler neck counterclockwise -arrow C- and remove.
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.
Disconnect plug connectors:
1. Valve 1 for variable valve timing -N205-
3. Air mass meter -G70-
4. Solenoid valve 1 for activated charcoal container -N80-
5. Hall sender -G40-
Unscrew bolt -2- for ground wire and bolts -arrows- for wiring harness, move wiring harness with wiring harness to left. Remove bolt -arrow- and lay coolant lines -1- aside.
Unscrew bolts -arrows- and lay aside pipe -1- for exhaust gas recirculation.
Remove fuel supply hose -2-.
Attention! Before depressurization of the injection system, it is necessary to relieve the fuel pressure to the residual pressure. When relieving residual pressure, place a clean cloth around the connection and remove carefully.
Loosen screw connections -1- and -3- and detach high pressure line.
Loosen camshaft housing bolts in sequence -15... 1-. Carefully raise the camshaft housing. Mark for reassembly matching the valve lever with roller and hydraulic compensator. Remove the valve lever with roller together with the hydraulic lifters and place on a clean pad.
Installation
Not a single piston "TDC".
Instruction. Replace the oil strainer in the cylinder head. Replace bolts for camshaft bearing housing. Danger of contamination of the lubrication system and bearings. 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.
Check whether the camshafts are fixed as follows: the locking pin -A- must be inserted through the locating hole of the intake camshaft gear into the calibration hole on the camshaft bearing housing. Locking pin -B- must be inserted through the locating hole of the exhaust camshaft gear into the calibration hole on the camshaft bearing housing.
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-. Insert new oil strainer -arrow- into cylinder head.
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 coat of sealant to the shaded areas of the clean sealing surface of the camshaft bearing housing.
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.
Instruction. Make sure that the camshaft housing is not warped.
Tighten the camshaft housing bolts. After installing the camshaft housing, dry the sealant for about 30 minutes. Install in the reverse order, while installing the high pressure line. Install pipe for exhaust gas recirculation. Install the rear toothed belt cover. Install the intake manifold flap vacuum regulator. Install the associated drive toothed belt.
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