Valve Clearance Adjustment (LLU/A16LET)
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Valve Clearance Adjustment (LLU/A16LET)
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Special Tools
For equivalent regional tools, refer to
Special Tools
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1.
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Note
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Counterhold at hexagon of camshaft.
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Inspect the 2 valve lash, intake valve cylinder 1.
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1.1.
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Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 1 are in the test position.
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1.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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1.3.
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Write down the result.
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2.
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Inspect the 2 valve lash, intake valve cylinder 3.
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2.1.
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Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 3 are in the test position.
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2.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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2.3.
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Write down the result.
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3.
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Inspect the 2 valve lash, intake valve cylinder 4.
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3.1.
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Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 4 are in the test position.
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3.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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3.3.
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Write down the result.
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4.
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Inspect the 2 valve lash, intake valve cylinder 2.
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4.1.
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Turn the intake camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 2 are in the test position.
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4.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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4.3.
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Write down the result.
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5.
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When replacing the exhaust camshaft, inspect the valve lash of the exhaust valves.
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6.
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Inspect the 2 valve lash, exhaust valve cylinder 4.
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6.1.
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Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 4 are in the test position.
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6.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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6.3.
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Write down the result.
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7.
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Inspect the 2 valve lash, exhaust valve cylinder 2.
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7.1.
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Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 2 are in the test position.
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7.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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7.3.
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Write down the result.
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8.
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Inspect the 2 valve lash, exhaust valve cylinder 1.
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8.1.
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Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon until the cams of cylinder 1 are in the test position.
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8.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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8.3.
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Write down the result.
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9.
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Inspect the 2 valve lash, exhaust valve cylinder 3.
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9.1.
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Turn the exhaust camshaft in the direction of engine rotation by the camshaft hexagon gear until the cams of cylinder 3 are in the test position.
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9.2.
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Insert the
EN-6361
gauge , inspect the valve lash.
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9.3.
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Write down the result.
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10.
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Note
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Note the removal sequence 1-4. Mark the exhaust and intake camshaft bearing caps before removal.
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Remove the 4 camshaft bearing front cap fasteners in sequence from the camshaft bearing front cap (1).
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11.
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Release the intake bearing support by striking it gently with a plastic hammer.
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12.
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Remove the camshaft bearing front cap.
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13.
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Detach the intake camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
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14.
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Remove the intake camshaft bearing cover from the cylinder head.
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15.
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Remove the intake camshaft.
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16.
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Detach the exhaust camshaft bearing caps 1-4 working from outside to inside in a spiral in steps of 1/2 up to 1 turn.
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17.
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Remove the exhaust camshaft bearing cover from the cylinder head.
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18.
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Remove the exhaust camshaft.
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19.
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Using the
EN-845
device (1), remove the 16 valve tappets.
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20.
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Determine valve lifter size.
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•
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Measurement of the cup tappet installed
3.12 mm (0.123 in)
, identification number 12. Measured value between cams and cup tappets
+0.31 mm (0.012 in)
=
3.43 mm (0.135 in)
. Required value, valve lash -
0.25 mm (0.010 in)
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•
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Note
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The identification number, arrow, is on the inside of the valve tappet.
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Measurement of the new cup tappet =
3.18 mm (0.125 in)
, identification number 18. Use a valve tappet with this dimension or one that is nearest to it.
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1.
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Note
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Observe the correct assignment and coat the sliding surfaces with NEW engine oil.
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Install the 16 valve lifters (1); use the
EN 845
suction device.
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