Retightening of cylinder head bolts (not diesel engines) (only M1998)
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Retightening of cylinder head bolts (not diesel engines) (only M1998)
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Important
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It is very important that retightening is performed as instructed.
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1.
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Remove the ignition discharge module or the cover on the spark plugs.
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2.
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Remove the camshaft cover and tighten the bolts as follows:
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3.
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Loosen bolt 1 and retighten it. Repeat this procedure in turn as illustrated.
Tightening torque: 40 Nm (30 lbf ft).
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4.
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Tighten bolt 1 to
60 Nm (44 lbf ft).
Repeat this procedure in turn on all the other bolts, see illustration.
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5.
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Tighten bolt 1 a further
90°.
Repeat this procedure in turn on all the other bolts, see illustration.
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6.
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Tighten the timing cover screws.
Tightening torque: 22 Nm (16 lbf ft)
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7.
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Check the camshaft cover seal and replace if necessary.
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8.
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Fit the camshaft cover and start tightening bolts 1 and 2 by the recess, see illustration. Continue with the other bolts in turn.
Tightening torque: 15 Nm (11 lbf ft).
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9.
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Fit the ignition discharge module or cover on the spark plugs.
Tightening torque: 11 Nm (8 lbf ft).
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