XC90 FWD L6-32L VIN 96 B6324S2 Flywheel Rattle Noise: TSB TJ11459
If a rattle noise is heard on a vehicle with a manual transmission, attention should be paid to the Dual Mass Flywheel (DMF).
This TJ contains new information on how to check and measure the free play in the DMF.
SERVICE:
In the case of customer complaints, follow the steps below.
A. MEASURE THE DMF RADIAL FREE-PLAY:
The DMF should be mounted on the crankshaft during the measurement. (For the measurement you will need a torque wrench)
1. Impose a torque of 6 Nm (4.4lbf-ft) on one of the bolts that holds the clutch and DMF together.
- The secondary side of the DMF will now turn in the same direction as the applied torque.
2. Draw a line over both the primary and secondary side of the DMF (see Photo 1 in the attachment).
3. Now impose a 6 Nm (4.4lbf-ft) torque in the opposite direction than before.
- The secondary side of the DMF will now turn in the same direction as the applied torque.
4. Draw a line on the primary sides of the DMF in alignment with the line that you previously drew on the secondary side of the DMF.
5. Measure the distance (S) between the two lines on the primary side of the DMF.
6. If the distance (S) is below 35 mm (1-3/8") the radial play of the DMF is OK.
B. MEASURE THE DMF AXIAL FREE-PLAY:
The DMF should be demounted from the crankshaft and placed on an even surface during the measurement. (For the measurement you need a dial
indicator)
1. Use a dial indicator and place it as shown in Photo 2 in the attachment, the DMF should be in equal balance when the dial indicator is put in place.
2. Apply a force of approximately 100 N (approx 10 kg mass or 22.5 lbf) on pin (A) at the opposite side of the dial indicator.
3. Read the distance of the axial free-play on the dial indicator.
4. Now turn the DMF 1/3 of a revolution and do the whole procedure from the beginning (from point 1) and apply the force on pin B.
5. Repeat the procedure for pin C.
6. If the largest distance from the three cases is below 2 mm (0.078") the axial play of the DMF is OK.
Replace DMF if radial or axial free-play are outside specification, or if the noise is still present.
VOLVO STANDARD TIMES GUIDE (VSTG) INFO:
Operation number 43104-2- Manual Gearbox removal/installation- See VSTG
Operation number 21621-3- DMF removal- See VSTG
Operation number 99335-3- Flywheel measure as pr TJ 11459 - 0.1 hrs
