Engine - Rattle/Click Noise From Front Of Engine
LTB00474NAS06 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
WARRANTY
REPAIR PROCEDURE
VEHICLES WITH LESS THAN 500 MILES (800 KM)
1. Refer to Workshop Manual section 414-00 and disconnect the battery ground cable.
2. Refer to Workshop Manual section 303-01 and remove the lower timing cover.
3. 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.
^ If there is no gap between the tensioner plunger and the tensioner blade, carry out step 4.
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.
5. Using a suitable tie-strap, secure the tensioner blade away from the tensioner.
6. Remove the tensioner.
^ Remove the two (2) Torx bolts.
CAUTION:
Make sure that the plunger exerts pressure against the pin
7. Reset the tensioner.
a. Make sure the plunger is fully extended.
b. Push the plunger in to the tensioner body.
C. Continue to apply pressure to the plunger until it is fully retracted in to the tensioner body.
d. Insert a suitable pin.
8. Install the tensioner.
^ Tighten the two (2) Torx bolts to 10 Nm.
CAUTION:
Make sure that the plunger exerts pressure against the tensioner blade
9. 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
10. 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.
11. Re-position the tensioner.
^ Using a suitable plastic tool, lever the tensioner in to the correct position.
^ Install the upper Torx bolt.
12. 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.
13. Carry out the checks in steps 3 and 4 to the tensioner on the other engine bank, and carry out rectification if required.
14. Refer to Workshop Manual section 303-01 and install the lower timing cover.
15. 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
16. 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:
LR4 and Range Rover Sport Only
17. 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
18. 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
19. 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)
20. Refer to Workshop Manual section 303-01 and replace the tensioner blades, tensioners, chain guides and timing chain of the Timing Drive Components procedure.