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Fig. 1 Front cover pry pointsFig. 2 No. 1 piston TDC positionFig. 3 No. 1 piston TDC alignmentFig. 4 Camshaft TDC alignmentFig. 5 Timing chain alignmentFig. 6 Lefthand cam phaser alignmentFig. 7 Timing chain alignment marksFig. 8 Upper intake manifold tightening sequenceFig. 9 Valve cover tightening sequence. LefthandFig. 10 Valve cover tightening sequence. Righthand
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Timing Chain, Replace
Caution: The magnetic timing wheels must not come in contact with magnets or any other strong magnetic field. This will destroy the timing wheels ability to correctly relay camshaft position to camshaft position sensor.
1.
Disconnect battery ground cable.
2.
Remove air cleaner housing assembly.
3.
Remove upper intake manifold.
4.
Remove valve covers.
5.
Remove spark plugs, then raise and support vehicle.
6.
Drain cooling system into suitable container.
7.
Remove upper and lower oil pans.
8.
Remove righthand engine mount bracket.
9.
Remove bolts from front cover.
10.
Carefully remove front cover by carefully prying at seven indicated points,
Fig. 1.
11.
Rotate crankshaft counterclockwise to place No. 1 position at TDC on exhaust stroke by aligning dimple on crankshaft with block/bearing junction,
Fig. 2. Lefthand side cam phaser arrows should point toward each other and be parallel to valve cover sealing surface.
12.
Mark rotation direction of following timing chains for reference during installation:
a.
Lefthand side cam chain.
b.
Righthand side cam chain.
c.
Oil pump chain.
d.
Primary chain.
13.
Reset righthand cam chain tensioner by pushing back tensioner piston and installing tensioner pin tool No. 8514, or equivalent.
14.
Reset lefthand cam chain tensioner by lifting pawl, pushing back piston and installing tensioner pin tool No. 8514, or equivalent.
15.
Disengage oil pump chain tensioner spring from dowel pin, then remove oil pump chain tensioner.
16.
Remove oil pump sprocket T45 retaining bolt, then remove oil pump sprocket and oil pump chain.
17.
Install righthand camshaft phaser lock tool No. 10202, or equivalent. Minor rotation may be required to install camshaft phaser lock.
18.
Loosen both intake oil control valves, then exhaust oil control valve.
19.
Remove righthand camshaft phaser lock tool, then oil control valve from righthand side intake cam phaser.
20.
Pull righthand side intake cam phaser off of camshaft, then remove righthand side cam chain.
21.
Remove oil control valve, then pull righthand side exhaust cam phaser off camshaft.
22.
Install lefthand camshaft phaser lock tool No. 10202, or equivalent. Minor rotation may be required to install camshaft phaser lock.
23.
Loosen both intake oil control valve and exhaust oil control valve.
24.
Remove lefthand camshaft phaser lock tool, then oil control valve from lefthand side exhaust cam phaser.
25.
Pull lefthand side exhaust cam phaser off of camshaft, then remove lefthand side cam chain.
26.
Remove oil control valve, then pull lefthand side intake cam phaser off of camshaft.
27.
Reset primary chain tensioner by pushing back tensioner piston and installing tensioner pin tool No. 8514, or equivalent. Remove two T30 bolts, then primary chain tensioner.
28.
Remove timing chain.
29.
Reverse procedure to install, note following:
a.
Verify No. 1 piston is positioned at TDC by aligning dimple on crankshaft with block/bearing cap junction,
Fig. 3.
b.
Verify camshafts are set at TDC by positioning alignment holes vertically,
Fig. 4.
c.
Ensure timing chain plated link is located at 12 o'clock when dimple on crankshaft is aligned with block/bearing cap junction,
Fig. 5.
d.
Position lefthand side cam phasers so that arrows point toward each other and are parallel to valve cover sealing surface,
Fig. 6.
e.
Torque idler sprocket bolt to 18 ft. lbs.
f.
Torque oil control valve to 110 ft. lbs.
g.
Torque oil pump sprocket bolt to 18 ft. lbs.
h.
Ensure there are 12 chain pins between exhaust cam phaser triangle marking and intake cam phaser circle marking,
Fig. 7.
i.
Torque upper intake manifold bolts to 80 inch lbs., in sequence, as illustrated in
Fig. 8.
j.
Torque lefthand valve cover bolts in sequence, as illustrated in
Fig. 9, to 106 inch lbs.
k.
Torque righthand valve cover bolts in sequence, as illustrated in
Fig. 10, to 106 inch lbs.
l.
Torque timing chain tensioner to 106 inch lbs.
m.
Torque timing chain guide to 106 inch lbs.
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- Fig. 1 Front cover pry points
- Fig. 2 No. 1 piston TDC position
- Fig. 3 No. 1 piston TDC alignment
- Fig. 4 Camshaft TDC alignment
- Fig. 5 Timing chain alignment
- Fig. 6 Lefthand cam phaser alignment
- Fig. 7 Timing chain alignment marks
- Fig. 8 Upper intake manifold tightening sequence
- Fig. 9 Valve cover tightening sequence. Lefthand
- Fig. 10 Valve cover tightening sequence. Righthand
CAUTION: The bolts are different lengths and must be returned to their original location.
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