Lexus RX (RX 350L, RX450h) 2016-2024 Repair Manual: Inspection

(b) Using a dial indicator, measure the thrust clearance while moving the connecting rod back and forth.

Standard Thrust Clearance:

0.15 to 0.40 mm (0.00591 to 0.0157 in.)

Maximum Thrust Clearance:

0.50 mm (0.0197 in.)

HINT:

If the thrust clearance is more than the maximum, replace the connecting rod sub-assembly. If necessary, replace the crankshaft.

(c) Lay a strip of Plastigage on the crank pin.

*a

Front Mark

Front of Engine

(g) Measure the Plastigage at its widest point.

Standard Oil Clearance:

0.045 to 0.067 mm (0.00177 to 0.00264 in.)

Maximum Oil Clearance:

0.070 mm (0.00276 in.)

Standard Connecting Rod Diameter:

Standard Connecting Rod Bearing Center Wall Thickness:

Standard Crankshaft Pin Diameter:

52.992 to 53.000 mm (2.08630 to 2.08661 in.)

NOTICE:

Completely remove the Plastigage after the measurement.

(a) Using a precision straightedge and feeler gauge, check the surfaces which contact the cylinder head gasket for warpage.

Maximum Warpage:

0.07 mm (0.00276 in.)

HINT:

If the warpage is more than the maximum, replace the cylinder block sub-assembly.

*a

Thrust Direction

*b

Axial Direction

*c

10 mm (0.394 in.)

*d

Center

Front of Engine

(a) Using a micrometer, measure the piston diameter at a right angle to the piston center line where the distance from the bottom of the piston is as specified.

Distance:

9.2 mm (0.362 in.)

Reference Diameter (New Parts):

93.962 to 93.992 mm (3.69928 to 3.70047 in.)

Minimum Diameter:

93.830 mm (3.69409 in.)

HINT:

If the piston diameter is less than the minimum, replace the piston and piston pin as a set.

(a) Using a feeler gauge, measure the clearance between a new piston ring set and the wall of the ring groove.

Standard Ring Groove Clearance:

HINT:

If the clearance is not as specified, replace the piston.

(a) Using a caliper gauge, measure the inside diameter of the piston pin hole.

Standard Piston Pin Hole Inside Diameter:

(b) Using a micrometer, measure the piston pin diameter.

Standard Piston Pin Diameter:

(d) Using a caliper gauge, measure the inside diameter of the connecting rod small end bush.

Standard Bushing Inside Diameter:

(e) Subtract the piston pin diameter measurement from the bushing inside diameter measurement.

Standard Oil Clearance:

0.005 to 0.011 mm (0.000197 to 0.000433 in.)

Maximum Oil Clearance:

0.030 mm (0.00118 in.)

(b) Using a piston, push in the piston ring slightly beyond the bottom of the ring travel, 110 mm (4.33 in.) from the top of the cylinder block sub-assembly.

(c) Using a feeler gauge, measure the end gap.

Standard End Gap:

Maximum End Gap:

HINT:

If the end gap is more than the maximum, replace the piston ring. If the end gap is more than the maximum even with a new piston ring, replace the cylinder block sub-assembly.

(b) Using a dial indicator, measure the thrust clearance while prying the crankshaft back and forth with a screwdriver.

Standard Thrust Clearance:

0.04 to 0.24 mm (0.00157 to 0.00945 in.)

Maximum Thrust Clearance:

0.30 mm (0.0118 in.)

Standard Thrust Washer Thickness:

2.43 to 2.48 mm (0.0957 to 0.0976 in.)

HINT:

If the thrust clearance is more than the maximum, replace the crankshaft thrust washer set. If necessary, replace the crankshaft.

(a) Using a vernier caliper, measure the diameter of the connecting rod bolt at several points within the area shown in the illustration.

Standard Diameter:

7.2 to 7.3 mm (0.283 to 0.287 in.)

Minimum Diameter:

7.0 mm (0.276 in.)

(3) Using a dial indicator, measure the runout at the center of each journal.

Maximum Runout:

0.06 mm (0.00236 in.)

HINT:

If the runout is more than the maximum, replace the crankshaft.

(1) Using a micrometer, measure the diameter of each main journal.

Standard Journal Diameter:

60.988 to 61.000 mm (2.40110 to 2.40157 in.)

HINT:

If the diameter is not as specified, check the oil clearance. If necessary, replace the crankshaft.

(1) Using a micrometer, measure the diameter of each crank pin.

Standard Crank Pin Diameter:

52.992 to 53.000 mm (2.08630 to 2.08661 in.)

HINT:

If the diameter is not as specified, check the oil clearance. If necessary, replace the crankshaft.

(e) Lay a strip of Plastigage across each journal.

(i) Measure the Plastigage at its widest point.

Standard Oil Clearance:

Maximum Oil Clearance:

NOTICE:

Completely remove the Plastigage after the measurement.

HINT:

If the oil clearance is more than the maximum, replace the crankshaft bearings. If necessary, replace the crankshaft.

*a

Number Mark

*b

No. 2 and No. 3 Crankshaft Bearing

*c

No. 1 and No. 4 Crankshaft Bearing

*d

No. 1

*e

No. 2

*f

No. 3

*g

No. 4

*h

20.9 mm (0.823 in.)

*i

17.9 mm (0.705 in.)

-

-

0 to 3

"1"

"1"

4 to 6

"1"

"2"

7 to 9

"2"

"2"

10 to 12

"2"

"3"

13 to 15

"3"

"3"

16 to 18

"3"

"4"

19 to 21

"4"

"4"

22 to 24

"4"

"5"

25 to 28

"5"

"5"

"00"

60.999 to 61.000 mm (2.40153 to 2.40157 in.)

"01"

60.998 to 60.999 mm (2.40149 to 2.40153 in.)

"02"

60.997 to 60.998 mm (2.40145 to 2.40149 in.)

"03"

60.996 to 60.997 mm (2.40141 to 2.40145 in.)

"04"

60.995 to 60.996 mm (2.40137 to 2.40141 in.)

"05"

60.994 to 60.995 mm (2.40133 to 2.40137 in.)

"06"

60.993 to 60.994 mm (2.40129 to 2.40133 in.)

"07"

60.992 to 60.993 mm (2.40126 to 2.40129 in.)

"08"

60.991 to 60.992 mm (2.40122 to 2.40126 in.)

"09"

60.990 to 60.991 mm (2.40118 to 2.40122 in.)

"10"

60.989 to 60.990 mm (2.40114 to 2.40118 in.)

"11"

60.988 to 60.989 mm (2.40110 to 2.40114 in.)

"1"

2.497 to 2.500 mm (0.09831 to 0.09843 in.)

"2"

2.501 to 2.503 mm (0.09846 to 0.09854 in.)

"3"

2.504 to 2.506 mm (0.09858 to 0.09866 in.)

"4"

2.507 to 2.509 mm (0.09870 to 0.09878 in.)

"5"

2.510 to 2.512 mm (0.09882 to 0.09890 in.)

"1"

2.478 to 2.481 mm (0.09756 to 0.09768 in.)

"2"

2.482 to 2.484 mm (0.09772 to 0.09780 in.)

"3"

2.485 to 2.487 mm (0.09783 to 0.09791 in.)

"4"

2.488 to 2.490 mm (0.09795 to 0.09803 in.)

"5"

2.491 to 2.493 mm (0.09807 to 0.09815 in.)

"1"

2.476 to 2.479 mm (0.09748 to 0.09760 in.)

"2"

2.480 to 2.482 mm (0.09764 to 0.09772 in.)

"3"

2.483 to 2.485 mm (0.09776 to 0.09783 in.)

"4"

2.486 to 2.488 mm (0.09787 to 0.09795 in.)

"5"

2.489 to 2.491 mm (0.09799 to 0.09807 in.)

"1"

2.493 to 2.496 mm (0.09815 to 0.09827 in.)

"2"

2.497 to 2.499 mm (0.09831 to 0.09839 in.)

"3"

2.500 to 2.502 mm (0.09843 to 0.09850 in.)

"4"

2.503 to 2.505 mm (0.09854 to 0.09862 in.)

"5"

2.506 to 2.508 mm (0.09866 to 0.09874 in.)

(a) Using a vernier caliper, measure the diameter of the threads at the measurement point.

Standard Diameter:

10.8 to 11.0 mm (0.425 to 0.433 in.)

Minimum Diameter:

10.7 mm (0.421 in.)

Measurement Point (Distance from the Seat):

40 mm (1.57 in.)

(a) Push the check valve with a pin to check that it is not stuck.

HINT:

If the check valve is stuck, replace the No. 1 oil nozzle sub-assembly.

(c) While covering (A), blow air into (B). Check that air does not leak through (C). Perform the check again while covering (B) and blowing air into (A).

HINT:

If air leaks, clean or replace the No. 1 oil nozzle sub-assembly.

(d) Push the check valve while covering (A), and blow air into (B). Check that air passes through (C). Perform the check again while covering (B), pushing the check valve and blowing air into (A).

HINT:

If air does not pass through (C), clean or replace the No. 1 oil nozzle sub-assembly.