Camshaft Timing Chain, Sprocket, and Tensioner Installation (LDK, LHU)
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Camshaft Timing Chain, Sprocket, and Tensioner Installation (LDK, LHU)
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Special Tools
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EN-45027
Tensioner Tool
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EN-48953
Camshaft Actuator Locking Tool
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For equivalent regional tools, refer to
Special Tools (LDK, LHU)
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1.
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Note
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The engine is timed top dead center exhaust stroke.
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Ensure the intake camshaft notch is in the 5 o'clock position (2) and the exhaust camshaft notch is in the 7 o'clock position (1). The number 1 piston should be at top dead center (TDC), crankshaft key at 12 o"clock.
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2.
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Install a friction washer (1), if equipped.
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3.
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Install the timing chain drive sprocket (3) to the crankshaft with the timing mark (2) in the 5 o'clock position and the front of the sprocket facing out.
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4.
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Install the remaining friction washer (1), if equipped.
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5.
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Note
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There are 3 colored links on the timing chain. 2 links are of matching color, and 1 link is of a unique color. Use the following procedure to line up the links with the actuators. Orient the chain so that the colored links are visible.
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Always use new actuator bolts.
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Assemble the intake camshaft actuator into the timing chain with the timing mark lined up with the uniquely colored link (1).
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6.
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Lower the timing chain through the opening in the cylinder head. Use care to ensure that the chain goes around both sides of the cylinder block bosses (1, 2).
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7.
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Install the intake camshaft actuator onto the intake camshaft while aligning the dowel pin into the camshaft slot.
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8.
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Hand tighten the new intake camshaft actuator bolt.
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9.
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Route the timing chain around the crankshaft sprocket and line up the first matching colored link (1) with the timing mark on the crankshaft sprocket, in approximately the 5 o'clock position.
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10.
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Rotate the crankshaft clockwise to remove all chain slack. Do not rotate the intake camshaft.
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11.
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Refer to
Fastener Caution
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Install the adjustable timing chain guide (1) down through the opening in the cylinder head and install the adjustable timing chain bolt. Tighten the adjustable timing chain guide bolt to
10 Nm (89 lb in)
.
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12.
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Install the exhaust camshaft actuator (1) into the timing chain with the timing mark lined up with the second matching colored link.
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13.
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Note
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Always install NEW actuator bolts.
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Install the exhaust camshaft actuator (1) onto the exhaust camshaft, aligning the dowel pin into the camshaft slot.
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14.
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Using a 23 mm open end wrench, rotate the exhaust camshaft approximately 45 degrees until the dowel pin in the camshaft actuator goes into the camshaft slot.
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15.
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When the actuator (1) seats on the cam, tighten the new exhaust camshaft actuator bolt hand tight.
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16.
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Verify that all of the colored links and the appropriate timing marks are still aligned. If they are not, repeat the portion of the procedure necessary to align the timing marks.
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17.
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Install the fixed camshaft chain guide (1) and bolts and tighten to
12 Nm (106 lb in)
.
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18.
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Install the upper balance shaft chain guide (1) and bolts and tighten to
10 Nm (89 lb in)
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19.
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Reset the timing chain tensioner by performing the following steps:
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19.1.
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Remove the snap ring.
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19.2.
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Remove the piston assembly from the body of the timing chain tensioner.
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19.3.
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Install the
EN-45027-2
base (2) into a vise.
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19.4.
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Install the notch end of the piston assembly into the
EN-45027-2
base (2).
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19.5.
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Using the
EN-45027-1
tensioner (1), turn the ratchet cylinder into the piston.
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19.6.
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Reinstall the piston assembly into the body of the tensioner.
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19.7.
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Install the snap ring.
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20.
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Inspect the timing chain tensioner seal for damage. If damaged, replace the seal.
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21.
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Inspect to ensure all dirt and debris is removed from the timing chain tensioner threaded hole in the cylinder head.
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22.
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Note
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Ensure the timing chain tensioner seal is centered throughout the torque procedure to eliminate the possibility of an oil leak.
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Note
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The timing chain tensioner is released by compressing it 2 mm (0.079 in), which will release the locking mechanism in the ratchet. The crankshaft balancer must be installed in order to release the tensioner.
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Install the timing chain tensioner unit (1) and tighten to
75 Nm (55 lb ft)
. Refer to
Crankshaft Balancer Installation (LDK, LHU)
for tensioner release instructions.
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23.
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Install
EN-48953
locking tool (1) and tighten the bolts into the cylinder head to
10 Nm (89 lb in)
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Using a torque wrench, tighten the camshaft actuator bolt to
30 Nm (22 lb ft), plus 100 degrees
using the
EN-45059
angle meter .
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24.
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Using a torque wrench, tighten the camshaft actuator bolt to
30 Nm (22 lb ft), plus 100 degrees
using the
EN-45059
angle meter .
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25.
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Remove
EN-48953
locking tool .
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26.
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Install the timing chain oil nozzle (1) and bolts and tighten to
10 Nm (89 lb in)
.
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28.
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Install the timing chain guide bolt access hole plug and tighten to
75 Nm (55 lb ft)
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