Inspection [09/2014 - 11/2017]: Procedure

WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY
1. Turn the roller by hand to check that it turns smoothly.
  HINT:
  
  If the roller does not turn smoothly, replace the No. 1 valve rocker arm sub-assembly.

INSPECT VALVE LASH ADJUSTER ASSEMBLY

NOTE:

Keep the valve lash adjuster assembly free of dirt and foreign objects.
Only use clean engine oil.

Place the valve lash adjuster assembly into a container filled with engine oil.

Insert the tip of SST into the valve lash adjuster assembly plunger and use the tip to press down on the check ball inside the plunger.

SST: 09276-75010

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Correct	*b	Incorrect
*c	Tapered Path	*d	Plunger
*e	Low Pressure Chamber	*f	Check Ball
*g	High Pressure Chamber	-	-

Squeeze SST and the valve lash adjuster assembly together to move the plunger up and down 5 to 6 times.
Check the movement of the plunger and bleed air.
OK

Plunger moves up and down.

NOTE:
When bleeding air from the high-pressure chamber, make sure that the tip of SST is actually pressing the check ball as shown in the illustration.

If the check ball is not pressed, air will not bleed.
After bleeding air, remove SST. Then try to quickly and firmly press the plunger by hand.
OK

Plunger is very difficult to move.

HINT:

If the plunger can still be compressed after bleeding air 3 times, replace the valve lash adjuster assembly with a new one.

INSPECT CAMSHAFT

Inspect the camshaft for runout.

Place the camshaft on V-blocks.

Using a dial indicator, measure the runout at the center journal.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Maximum Runout

0.04 mm (0.00157 in.)

HINT:

If the runout is more than the maximum, replace the camshaft.
Check the oil clearance after replacing the camshaft.
See step 18

Using a micrometer, measure the cam lobe height.

Standard Cam Lobe Height

Item	Specified Condition
Intake	44.318 to 44.418 mm (1.7448 to 1.7487 in.)
Exhaust	44.341 to 44.441 mm (1.7457 to 1.7496 in.)
Exhaust (for Fuel Pump)	56.450 to 56.550 mm (2.2224 to 2.2264 in.)

Minimum Cam Lobe Height

Item	Specified Condition
Intake	44.168 mm (1.7389 in.)
Exhaust	44.191 mm (1.7398 in.)
Exhaust (for Fuel Pump)	56.300 mm (2.2165 in.)

Using a micrometer, measure the journal diameter.

Standard Journal Diameter

Item	Specification
No. 1 journal	35.946 to 35.960 mm (1.4152 to 1.4157 in.)
Other journals	25.959 to 25.975 mm (1.0220 to 1.0226 in.)

HINT:

If the journal diameter is not as specified, check the oil clearance.

See step 18

INSPECT CAMSHAFT TIMING GEAR ASSEMBLY
Refer to PROCEDURE - Step 27
INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY
Refer to PROCEDURE - Step 29
INSPECT CYLINDER HEAD SET BOLT
Refer to PROCEDURE - Step 31

INSPECT CHAIN SUB-ASSEMBLY

Using a spring scale, pull the chain sub-assembly with a force of 147 N (15 kgf, 33 lbf) and measure the length of the chain sub-assembly using a vernier caliper.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Measurement Area

Maximum Chain Elongation

136.9 mm (5.39 in.)

HINT:

Perform the measurement at 3 random places. If the elongation is more than the maximum, replace the chain sub-assembly.

INSPECT NO. 2 CHAIN SUB-ASSEMBLY

Using a spring scale, pull the No. 2 chain sub-assembly with a force of 147 N (15 kgf, 33 lbf) and measure the length of the No. 2 chain sub-assembly using a vernier caliper.

Maximum Chain Elongation

137.6 mm (5.42 in.)

HINT:

Perform the measurement at 3 random places. If the elongation is more than the maximum, replace the No. 2 chain sub-assembly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Measurement Area

INSPECT CRANKSHAFT TIMING GEAR OR SPROCKET

Place the chain sub-assembly around the crankshaft timing gear or sprocket.

Using a vernier caliper, measure the sprocket diameter with the chain sub-assembly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Minimum Sprocket Diameter (with Chain Sub-assembly)

61.4 mm (2.42 in.)

HINT:

The vernier caliper must contact the chain rollers when measuring.
If the diameter is less than the minimum, replace the chain sub-assembly and crankshaft timing gear or sprocket.

INSPECT IDLE SPROCKET ASSEMBLY

Place the chain sub-assembly around the idle sprocket assembly.

Using a vernier caliper, measure the sprocket diameter with the chain sub-assembly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Minimum Sprocket Diameter (with Chain Sub-assembly)

61.4 mm (2.42 in.)

HINT:

The vernier caliper must contact the chain rollers when measuring.
If the diameter is less than the minimum, replace the chain sub-assembly and idle sprocket assembly.

INSPECT IDLE GEAR SHAFT OIL CLEARANCE

Using a micrometer, measure the No. 1 idle gear shaft diameter.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Diameter

22.987 to 23.000 mm (0.905 to 0.906 in.)

Using a caliper gauge, measure the inside diameter of the idle sprocket assembly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Standard Diameter

23.020 to 23.030 mm (0.906 to 0.907 in.)

Subtract the No. 1 idle gear shaft diameter measurement from the idle sprocket assembly inside diameter measurement.
Standard Oil Clearance

0.020 to 0.043 mm (0.00079 to 0.00169 in.)

Maximum Oil Clearance

0.093 mm (0.00366 in.)

HINT:

If the oil clearance is more than the maximum, replace the No. 1 idle gear shaft and idle sprocket assembly.

INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY

Turn the stopper plate clockwise to release the lock. Push the plunger and check that it moves smoothly.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a	Moves Smoothly
*b	Plunger
*c	Stopper Plate

HINT:

If the plunger does not move smoothly, replace the No. 1 chain tensioner assembly.

INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a Depth

*b Moves smoothly
1. Check that the plunger moves smoothly.
2. Measure the depth of wear of the No. 2 chain tensioner assembly.
  Maximum Depth
  
  0.9 mm (0.0354 in.)
  
  HINT:
  
  If the depth is more than the maximum, replace the No. 2 chain tensioner assembly.
INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*a Depth

*b Moves smoothly
1. Check that the plunger moves smoothly.
2. Measure the depth of wear of the No. 3 chain tensioner assembly.
  Maximum Depth
  
  0.9 mm (0.0354 in.)
  
  HINT:
  
  If the depth is more than the maximum, replace the No. 3 chain tensioner assembly.

INSPECT CHAIN TENSIONER SLIPPER

Measure the depth of wear of the chain tensioner slipper.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Depth

Maximum Depth

1.0 mm (0.0394 in.)

HINT:

If the depth is more than the maximum, replace the chain tensioner slipper.

INSPECT NO. 1 CHAIN VIBRATION DAMPER

Measure the depth of wear of the No. 1 chain vibration damper.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Depth

Maximum Depth

1.0 mm (0.0394 in.)

HINT:

If the depth is more than the maximum, replace the No. 1 chain vibration damper.

INSPECT NO. 2 CHAIN VIBRATION DAMPER

Measure the depth of wear of the No. 2 chain vibration damper.

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Depth

Maximum Depth

1.0 mm (0.0394 in.)

HINT:

If the depth is more than the maximum, replace the No. 2 chain vibration damper.

INSPECT CAMSHAFT OIL CLEARANCE

for Bank 1:

Clean the camshaft bearing caps, camshaft housing sub-assembly RH and camshaft journals.
Place the camshafts on the camshaft housing sub-assembly RH.

Lay a strip of Plastigage across each camshaft journal.

*a	Plastigage

Install the camshaft bearing caps.
NOTE:
Do not turn the camshafts.

Refer to PROCEDURE - Step 18
Remove the camshaft bearing caps.
Refer to PROCEDURE - Step 8

Measure the Plastigage at its widest point.

*a	Intake Side
*b	Exhaust Side
*c	Plastigage
*d	No. 1 Journal
*e	Other Journals

Standard Oil Clearance

Item	Specified Condition
Exhaust side No. 1 journal	0.031 to 0.078 mm (0.00122 to 0.00307 in.)
Other journals	0.025 to 0.062 mm (0.00098 to 0.00244 in.)

Maximum Oil Clearance

Item	Specified Condition
Exhaust side No. 1 journal	0.10 mm (0.00394 in.)
Other journals	0.09 mm (0.00354 in.)

HINT:

If the oil clearance is more than the maximum, replace the camshaft.
If the oil clearance is still more than the maximum after replacing the camshaft, replace the camshaft housing sub-assembly RH.

for Bank 2:

Clean the camshaft bearing caps, camshaft housing sub-assembly LH and camshaft journals.
Place the camshafts on the camshaft housing sub-assembly LH.

Lay a strip of Plastigage across each camshaft journal.

*a	Plastigage

Install the camshaft bearing caps.
NOTE:
Do not turn the camshafts.

Refer to PROCEDURE - Step 14
Remove the camshaft bearing caps.
Refer to PROCEDURE - Step 14

Measure the Plastigage at its widest point.

*a	Intake Side
*b	Exhaust Side
*c	Plastigage
*d	No. 1 Journal
*e	Other Journals

Standard Oil Clearance

Item	Specified Condition
Exhaust side No. 1 journal	0.031 to 0.078 mm (0.00122 to 0.00307 in.)
Other journals	0.025 to 0.062 mm (0.00098 to 0.00244 in.)

Maximum Oil Clearance

Item	Specified Condition
Exhaust side No. 1 journal	0.10 mm (0.00394 in.)
Other journals	0.09 mm (0.00354 in.)

HINT:

If the oil clearance is more than the maximum, replace the camshaft.
If the oil clearance is still more than the maximum after replacing the camshaft, replace the camshaft housing sub-assembly LH.

INSPECT INTAKE MANIFOLD

Using a precision straightedge and feeler gauge, measure the warpage of the surfaces which contact the cylinder head and intake air surge tank assembly.

*a	Intake Air Surge Tank Assembly Side
*b	Cylinder Head Side

Maximum Warpage

0.10 mm (0.00394 in.)

HINT:

If the warpage is more than the maximum, replace the intake manifold.