Remove the toothed belt drive pulley using a puller -T10320-. Remove the left cylinder head cover.
Remove the exhaust gas recirculation radiator switch valve -N345- -item. 1-with bracket. Remove bolt -4- and ball pin -2-. Release wiring harness -3- on rear left coolant pipe. -Arrows- ignore.
Unscrew the union nut -1- of the high-pressure line. Unscrew the bolts -arrows- and remove the fuel. ramp from the left cylinder head.
Loosen the crankshaft frame bolts and nuts in the sequence -18...1-. When removing camshafts, pay attention to the rocker arms and compensators. Carefully remove the crankshaft frame from the camshafts.
Installation
Risk of damage to the thrust bearing in the crankshaft frame. Install camshafts strictly in accordance with the description using the camshaft installation tool -T40094-. Risk of contamination of the lubrication system. Close open cylinder head parts. Remove remaining sealant from the cylinder head and camshaft frame, for example using a rotating brush with plastic bristles. Clean the seating surfaces; There should be no oil or grease on them. Lubricate the working surface of the camshafts with oil. Equip the camshaft installation tool -T40094- as follows: insert support -T40094/2 into seat -A-, insert support -T40094/1 into seat -D-.
Place exhaust camshaft -1- on support -T40094/1- and -T40094/2-. Rotate the exhaust camshaft until it can be locked in position "TDC" -arrow-. Position the camshaft setting tool -T40096- on the exhaust camshaft gearing so that each jaw of the clamping device engages on each gear half. Tighten the clamping device using the knurled wheel until the tooth profiles are level.
Install the intake camshaft -2- into the camshaft installation tool -T40094-. The locking pin -3- must fit into the groove of the intake camshaft. Push the exhaust camshaft -1- towards the intake camshaft -arrows- until the teeth engage.
Make sure that the camshafts are in the correct position: the recesses -arrows- on both camshafts must point outwards.
Place crankshaft frame -1- on both camshafts. All camshaft bearings must be on the camshafts. Place the camshaft setting tool -T40095- on the camshafts; to do this, align the gripping pliers and secure with knurled nuts -2-. Apply tension to the camshafts by tightening the knurled nuts -3- upwards.
Make sure that the pins -arrows- are present in the cylinder head. If there are no centering pins, insert them.
Consider the expiration date of the sealant. From? cut the tube spout along the front mark (hole diameter approx. 1.5 mm). For better illustration, the crankshaft frame is shown without camshafts. Turn over the crankshaft frame. There is a danger of clogging the lubrication system channels if there is excess sealant. The sealant beads must not: be thicker than the prescribed size. Apply a bead of sealant -arrows- to the clean seating surfaces of the camshaft frame as shown in the illustration. The grooves of the seating surfaces must be filled with sealant. The sealant beads should protrude 1.5...2.0 mm above the seating surface. Install the crankshaft frame within 5 minutes after applying the sealant.
Risk of engine damage. Check that all roller rocker arms are correctly installed on the ends of the valve stems and compensators. Install the crankshaft frame with both camshafts and the camshaft installation tool -T40095- onto the cylinder head. Tighten the crankshaft frame bolts. Remove camshaft installation tool -T40095- and -T40096-. After installing the crankshaft frame, allow the sealant to cure for about 30 minutes. Install in reverse order. Install the left cylinder head cover. Replace the camshaft lip seal. Install the injection pump timing belt and the upper part of the intake manifold. Install the camshaft drive chains. Risk of damage to valves and piston crowns after working on the valve mechanism. Since the hydraulic lifters must be seated, after installing the camshafts, the engine should not be started for approx. 30 min. To ensure that no valve comes into contact with the cylinder head during operation, carefully turn the engine at least 2 turns.
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