Aviator AWD V8-4.6L DOHC VIN H (2003)
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Remove the timing chain tensioning system from both timing chains.
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Remove the bolts.
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Remove the timing chain tensioners.
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Remove the timing chain tensioner arms.
Items 41-78: Timing Drive Components Installation Note
1. NOTE: Compress the tensioner and install the retaining pin.
NOTE: LH tensioner is shown, RH tensioner is similar.
Install the tensioners.
2. CAUTION: Timing marks must be at the 12 o'clock position and indexed at the 6 o'clock position.
Install the camshaft sprockets and chain as an assembly.
3. Install the special tool.