Engine Unit

3UR-FBE ENGINE MECHANICAL: ENGINE UNIT: INSPECTION

1. INSPECT CYLINDER HEAD SET BOLT

(a) Using a vernier caliper, measure the diameter of the elongated thread at the measuring point.

Standard diameter:

10.85 to 11.00 mm (0.427 to 0.433 in.)

Minimum diameter:

10.6 mm (0.417 in.)

(b) If the diameter is less than the minimum, replace the cylinder head bolt.

HINT
If a visual check reveals no excessively thin areas, check the center of the bolt (see illustration) and find the area that has the lowest diameter.

2. INSPECT NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY

(a) Turn the roller by hand to check that it turns smoothly.

If the roller does not turn smoothly, replace the valve rocker arm.

3. INSPECT VALVE LASH ADJUSTER ASSEMBLY

NOTICE:
* Keep the adjuster free from dirt and foreign objects.
* Use only clean engine oil.

(a) Place the lash adjuster into a container full of new engine oil.

(b) Insert SST's tip into the lash adjuster's plunger and use the tip to press down on the check ball inside the plunger.

SST : 09276-75010

(c) Squeeze SST and the lash adjuster together to move the plunger up and down 5 to 6 times.

(d) Check the movement of the plunger and bleed air.

OK:

Plunger moves up and down.

NOTICE:
When bleeding high-pressure air from the compression 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.

(e) After bleeding the air, remove SST. Then try to quickly and firmly press the plunger with your fingers.

OK:

Plunger can be pressed 3 times.

(f) If the plunger can still be compressed after pressing it 3 times, replace the lash adjuster with a new one.

4. INSPECT CAMSHAFT SUB-ASSEMBLY

(a) Inspect the camshaft for runout.

(1) Place the camshaft on V-blocks.

(2) Using a dial indicator, measure the circle runout at the center journal.

Maximum circle runout:

0.04 mm (0.00157 in.)

(3) If the circle runout is more than the maximum, replace the camshaft.

HINT
Check the oil clearance after replacing the camshaft.

(b) Using a micrometer, measure the cam lobe height.

Standard Cam Lobe Height:

Minimum Cam Lobe Height:

(d) Using a micrometer, measure the journal diameter.

Standard Journal Diameter:

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

5. INSPECT CAMSHAFT TIMING GEAR ASSEMBLY Testing and Inspection

6. INSPECT CAMSHAFT TIMING EXHAUST GEAR ASSEMBLY Testing and Inspection

7. INSPECT CHAIN SUB-ASSEMBLY

(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33.1 lbf) as shown in the illustration.

(b) Using a vernier caliper, measure the length of 15 pins.

Maximum chain elongation:

136.9 mm (5.39 in.)

HINT
Perform the measurement at 3 random places.

(c) If the elongation is more than the maximum, replace the chain.

8. INSPECT NO. 2 CHAIN SUB-ASSEMBLY

(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33.1 lbf) as shown in the illustration.

(b) Using a vernier caliper, measure the length of 15 pins.

Maximum chain elongation:

137.6 mm (5.42 in.)

HINT
Perform the measurement at 3 random places.

(c) If the elongation is more than the maximum, replace the chain.

9. INSPECT CRANKSHAFT TIMING GEAR OR SPROCKET

(a) Wrap the chain around the sprocket.

(b) Using a vernier caliper, measure the sprocket diameter with the chain.

Minimum sprocket diameter (w/ chain):

61.4 mm (2.42 in.)

HINT
The vernier caliper must contact the chain rollers for the measurement.

(c) If the diameter is less than the minimum, replace the chain and sprocket.

10. INSPECT CRANKSHAFT TIMING SPROCKET LH

(a) Move the stopper plate upward to release the lock. Push the plunger and check that it moves smoothly.

If necessary, replace the chain tensioner.

12. INSPECT NO. 2 CHAIN TENSIONER ASSEMBLY

(a) Check that the plunger moves smoothly.

(b) Measure the worn depth of the chain tensioner.

Maximum depth:

0.9 mm (0.0354 in.)

(c) If the depth is more than the maximum, replace the chain tensioner.

13. INSPECT NO. 3 CHAIN TENSIONER ASSEMBLY

(a) for LH:

(1) Measure the worn depth of the chain tensioner slipper.

Maximum depth:

1.0 mm (0.0394 in.)

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

(b) for RH:

(1) Measure the worn depth of the chain tensioner slipper.

Maximum depth:

1.0 mm (0.0394 in.)

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

15. INSPECT NO. 1 CHAIN VIBRATION DAMPER

(a) for LH:

(1) Measure the worn depth of the chain vibration damper.

Maximum depth:

1.0 mm (0.0394 in.)

(2) If the depth is more than the maximum, replace the chain vibration damper.

(b) for RH:

(1) Measure the worn depth of the chain vibration damper.

Maximum depth:

1.0 mm (0.0394 in.)

(2) If the depth is more than the maximum, replace the chain vibration damper.

16. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY LH

(a) Using a precision straightedge and feeler gauge, measure the warpage of the contact surface of the cylinder head.

Maximum warpage:

0.7 mm (0.0276 in.)

(b) If the warpage is more than the maximum, replace the exhaust manifold.

17. INSPECT EXHAUST MANIFOLD SUB-ASSEMBLY RH