Jaguar XJ (X350). Manual — part 470
9 . Install the primary timing chain tensioner guide.
Tighten to 12 Nm.
10
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CAUTION: During timing chain tensioner compression, do not release the ratchet
stem until the timing chain tensioner piston is fully bottomed in its bore or damage to the
ratchet stem will result.
Using a suitable tool, hold the left-hand timing chain tensioner ratchet lock mechanism away
from the ratchet stem.
11
.
NOTE:
The timing chain tensioner piston should retract with minimal force. If binding occurs,
reposition the timing chain tensioner to eliminate side loading.
Slowly compress the left-hand timing chain tensioner.
12
.
NOTE:
The retaining tool must remain in the timing chain tensioner until the timing chain
tensioner is installed to the engine with the piston bottomed in the bore.
Using a suitable tool, retain the left-hand timing chain tensioner piston.
13 . Install the primary timing chain tensioner assembly.
Tighten to 12 Nm.
14 . Release the tension in the left-hand timing chain tensioner.
Remove the retaining tool.
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15
.
CAUTION: While applying the opposing force to sprocket and chain, tighten the
sprocket bolt.
CAUTION: Make sure that a new bolt is installed.
Using the special tool apply force to the tool in an anti-clockwise direction to tension the
primary timing chain on its drive side.
Tighten to 20 Nm + 90 deg.
16
.
CAUTION: While applying the opposing force to sprocket and chain, tighten the
sprocket bolt.
CAUTION: Make sure that a new bolt is installed.
Using the special tool apply force to the tool in an anti-clockwise direction.
Tighten to 20 Nm + 90 deg.
17 . Using a suitable tool, retain the right-hand timing chain tensioner piston.
18
.
CAUTION: Do not tighten the camshaft sprocket retaining bolts.
CAUTION: Make sure the secondary timing chain and camshaft sprockets are free
to rotate.
Install the camshaft sprockets.
Install the secondary timing chain tensioner and secondary timing chain to
the camshaft sprockets.
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