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Engine - Rattle/Click Noise From Front Of Engine
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 1
Vehicle: All Technical Service Bulletins Engine - Rattle/Click Noise From Front Of Engine
LTB00474NAS
06 AUG 2012
SECTION: 303-01
"Rattle"/"Click" Noise from Front of Engine
AFFECTED VEHICLE RANGE
CONDITION SUMMARY:
Situation:
A 'rattle' / 'click' noise may be heard from the front of the engine. The noise may be more pronounced when the engine is at idle speed
Cause:
This may be caused by insufficient tension on the engine's primary chain system.
Action:
In the event of a customer concern of the above, refer to the Repair Procedure outlined below.
PARTS
TOOLS:
Refer to Workshop Manual for any required special tools
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 2
WARRANTY
REPAIR PROCEDURE
VEHICLES WITH LESS THAN 500 MILES (800 KM)
- Refer to Workshop Manual section 414-00 and disconnect the battery ground cable.
- Refer to Workshop Manual section 303-01 and remove the lower timing cover.
- Check that the tensioner plunger is not stuck within the tensioner body.
- If there is a gap between the tensioner plunger and the tensioner blade, the tensioner plunger is stuck within the tensioner body carry out steps 5 to 9.
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 3
- If there is no gap between the tensioner plunger and the tensioner blade, carry out step 4.
- Make sure that the timing chain tensioner plunger is positioned in the first ratchet position.
- Firmly squeeze the timing chain to see if the tensioner plunger retracts in to the tensioner body.
- If the tensioner plunger retracts all the way in to the tensioner body and/or if the tensioner blade makes contact with the tensioner body, the tensioner plunger is not in the first ratchet position, carry out steps 10 to 12.
NOTE:
Only carry out steps 5 to 9 if the tensioner plunger is stuck within the tensioner body.
- Using a suitable tie-strap, secure the tensioner blade away from the tensioner.
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 4
- Remove the tensioner.
^ Remove the two (2) Torx bolts.
CAUTION:
Make sure that the plunger exerts pressure against the pin
- Reset the tensioner.
- Make sure the plunger is fully extended.
- Push the plunger in to the tensioner body.
- Continue to apply pressure to the plunger until it is fully retracted in to the tensioner body.
- Insert a suitable pin.
- Install the tensioner.
^ Tighten the two (2) Torx bolts to 10 Nm.
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 5
CAUTION:
Make sure that the plunger exerts pressure against the tensioner blade
- Release the tensioner plunger.
- Remove the pin.
- Proceed to step 13.
NOTE:
Only carry out steps 10 to 12 if the tensioner plunger is not in the first ratchet position
CAUTION:
Do not remove the lower Torx bolt
- Release the tensioner.
- Remove the upper Torx bolt.
- Slacken the lower Torx bolt.
- Allow the tensioner to pivot around the lower bolt, this will allow the plunger to extend and latch in to the first ratchet position.
CAUTION:
Do not use a metal tool to lever the tensioner
CAUTION:
Make sure that the upper Torx bolt is installed finger tight before removing the lever from the tensioner.
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 6
- Re-position the tensioner.
- Using a suitable plastic tool, lever the tensioner in to the correct position.
- Install the upper Torx bolt.
- Secure the tensioner.
- Tighten the two (2) Torx bolts to 10 Nm.
- Repeat the check in step 4 to make sure that the plunger is in the first ratchet position.
- Continue to step 13.
- Carry out the checks in steps 3 and 4 to the tensioner on the other engine bank, and carry out rectification if required.
- Refer to Workshop Manual section 303-01 and install the lower timing cover.
- Refer to Workshop Manual section 414-00 and connect the battery ground cable.
VEHICLES WITH MORE THAN 500 MILES (800 KM) BUT LESS THAN 40,000 MILES (64,000 KM)
NOTE:
LR4 and Range Rover Sport Only
NOTE:
Do not remove the timing chain guides
- Remove and discard the tensioner blades and tensioners from both engine banks.
^ Refer to Workshop Manual section 303-01 and carry out removal steps 1 to 14 and step 16 of the Timing Drive Components
2012 Land Rover Range Rover (LM) V8-5.0L SC Page 7
procedure.
NOTE:
LR4 and Range Rover Sport Only
- Install the new tensioner blades and tensioners.
- Refer to Workshop Manual section 303-01 and carry out install step 1 and steps 3 to 50 of the Timing Drive Components procedure.
NOTE:
Range Rover Only
NOTE:
Do not remove the timing chain guides
- Remove and discard the tensioner blades and tensioners from both engine banks.
- Refer to Workshop Manual section 303-01 and carry out removal steps 1 to 14 and step 16 of the Timing Drive Components procedure.
NOTE:
Range Rover Only
- Install the new tensioner blades and tensioners.
- Refer to Workshop Manual section 303-01 and carry out install step 1 and steps 3 to 45 of the Timing Drive Components procedure.
VEHICLES WITH MORE THAN 40,000 MILES (64,000 KM)
- Refer to Workshop Manual section 303-01 and replace the tensioner blades, tensioners, chain guides andtiming chain of the Timing Drive Components procedure.
LTB00474NAS
