Cylinder head components, removing and fitting
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Cylinder head components, removing and fitting
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2.
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Remove the heat shield plate from the exhaust manifold.
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3.
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Remove the engine transport bracket from the exhaust manifold.
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4.
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Remove the exhaust manifold (2) from the cylinder head.
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5.
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Remove the thermostat housing from the cylinder head.
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7.
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Clean the sealing surfaces and remove remains of sealant.
Caution
Note the marking on the camshaft bearing bracket before removing!
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8.
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The camshafts must come loose evenly from their bearing seats.
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9.
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Undo the camshaft caps alternately in a spiral from the outside and in 1/2 to 1 turn.
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10.
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Remove the camshaft caps from the cylinder head and take off the camshafts.
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11.
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Use a suitable tool to wiggle out the camshaft sealing rings - do not damage the sealing surfaces.
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12.
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Clean the sealing surfaces and remove remains of sealant.
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13.
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Pull out the hydraulic tappets (2) from the cylinder head with KM-845 or
83 91 401 Magnetic tool
(1) and put them aside in the correct order so they can be refitted to the correct valves.
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14.
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Lay up the hydraulic tappets in order.
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15.
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Clean all dismantled components.
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16.
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Oil the tappets with engine oil and place in the right order in the cylinder head.
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17.
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Moisten the sliding surfaces on the hydraulic valve tappets and camshafts with MoS slip paste (grey). Put the camshafts into the cylinder head.
Caution
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18.
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The numbers on the camshaft bearing caps must agree with the ones in the cylinder head.
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19.
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Apply sealing compound (green) to the guide bearing sealing surfaces (arrows).
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20.
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Fit the camshaft bearing caps onto the cylinder head and tighten from the inside and out - tightening torque 8 Nm.
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21.
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Lubricate the sealing lips on the new camshaft sealing rings with silicone grease (white). Press in the camshaft sealing rings into the camshaft bearing caps using KM-422 -
or 83 94 959 Fitting tool, camshaft seal, V6
using the camshaft sprocket bolt and washer.
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23.
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Fit the thermostat housing together with a new sealing ring on the cylinder head - tightening torque 20 Nm.
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24.
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Fit the exhaust manifold (2) together with a new seal and new retaining nuts on the cylinder head in the illustrated order - tightening torque 13 Nm + 13 Nm.
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25.
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Fit the engine transport bracket onto the exhaust manifold - tightening torque 22 Nm.
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26.
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Fit the heat shield plate onto the exhaust manifold - tightening torque 8 Nm.
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27.
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Fit the fuel regulator lambda sensor (1) into the exhaust manifold using KM-6129 - tightening torque 30 Nm.
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