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Высокие технологии Refitting
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Camshafts out.

Jammed, start over by refitting the bearing

Removal

VVT-i engines

75 Remove the timing chain as described in Section 6. There is no need to remove the camshaft sprockets unless you are renewing the camshafts.

76 Rotate the crankshaft 90° anti-clockwise to eliminate any possibility of accidental valve-to-piston contact during the camshaft removal procedure.

77 Working from the ends of the camshafts, gradually and evenly slacken and remove the bearing caps from the intake and exhaust camshafts. Lift off the bearing caps

Caution: As the centre bearing cap bolts are being loosened, make sure the camshafts are moving up evenly. If one end or the other stops moving and the camshaft gets

10.84 The camshaft bearing caps are marked (arrowed) E for exhaust, and I for intake caps. DO NOT try to lever or force the

78 Lift the camshaft straight up and out of the cylinder head.

79 Clean the oil off the camshaft followers, mark them with a felt-tip marker and remove them (see illustration). Store the camshaft bearing caps and followers so they can be reinstalled without mixing them up (see illustration 10.11b).

Inspection

80 Follow the instructions given in para-graphs 14 to 16.

81 Apply a little clean engine oil to the exhaust camshaft followers, then install them in their original locations. Repeat this procedure for the intake camshaft.

82 Apply a little clean engine oil to the exhaust camshaft lobes and bearing journals. Repeat this procedure for the intake camshaft.

83 Position the exhaust and intake camshaft with the lobes for No 1 cylinder pointing upwards, away from the followers (see illustration).

84 Refit the camshaft bearing caps to their original positions. Note that the exhaust bearing caps are marked E and the intake caps are marked I, as well as being numbered 2 to 5 from the timing chain end. No 1 bearing cap is the 'double' cap fitted adjacent to the timing chain. Apply a little clean engine oil to the threads and underside of the heads, then install the retaining bolts and tighten them gradually and evenly from the middle of the camshafts outwards (see illustration).


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