Thrust Bearing Preload

WARNING: This page is about a different car, the 2020 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.

Select a suitable adjusting washer No. 1 so that dimension (H) will be zero in a visual check. Position the washer (18.3 x 30 x t) and a new lock washer (18 x 30 x 2).
CAUTION: Make sure the lock washer is facing the correct direction.

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Tighten a new lock nuts using ST1, ST2 and ST3.
Tightening torque:

120 N.m (12.2 kgf-m, 88.5 ft-lb)

Preparation tool:

ST1: HOLDER (899884100)

ST2: STOPPER (498427100)

ST3: SOCKET WRENCH (27) (899988608)

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After removing the ST (STOPPER) used in step 2), measure the starting torque using ST3 and a torque driver.
Specification:

0.3 - 0.8 N.m (0.03 - 0.08 kgf-m, 0.22 - 0.59 ft-lb)

Preparation tool:

ST1: HOLDER (899884100)

ST3: SOCKET WRENCH (27) (899988608)

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If the starting torque is not within the standard value, select new adjusting washer No. 1 and recheck starting torque.

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Adjusting washer No. 1
Part No.	Thickness mm (in)
803025051	3.925 (0.1545)
803025052	3.950 (0.1555)
803025053	3.975 (0.1565)
803025054	4.000 (0.1575)
803025055	4.025 (0.1585)
803025056	4.050 (0.1594)
803025057	4.075 (0.1604)

If the specified starting torque cannot be obtained by the selection of adjusting washer No. 1, select adjusting washer No. 2 from the list below. Repeat steps 1 through 4 to adjust starting torque.

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Starting torque	Dimension H	Adjusting washer No. 2
Low	Small	Select thicker one.
High	Large	Select thinner one.

Adjusting washer No. 2
Part No.	Thickness mm (in)
803025059	3.850 (0.1516)
803025054	4.000 (0.1575)
803025058	4.150 (0.1634)

Recheck that the starting torque is within the specified range, then crimp the lock nut at four positions.

CAUTION: When crimping the lock nut, be careful not to crack it.