engine
Variable Valve Timing Actuator Torque Specs
for 2004 GMC Yukon 5.3L V8 Vortec · RWD
12 fasteners
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Cam Phaser Bolt
Apply threadlocker, hold cam stationary
48 lb-ft · 65 Nm
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Camshaft Sprocket Bolt
Hold cam with wrench on hex
59 lb-ft · 80 Nm
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Crankshaft Pulley Bolt
Often TTY - check spec, may require impact
133 lb-ft · 180 Nm
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Timing Chain Tensioner Bolt
Install with pin/clip to compress
18 lb-ft · 25 Nm
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Timing Cover Bolts - 8mm
Tighten in sequence
18 lb-ft · 25 Nm
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Valve Cover Bolts
Tighten in sequence
7 lb-ft · 10 Nm
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