Part 2
2AR-FE ENGINE MECHANICAL: ENGINE UNIT: INSPECTION - (Continued)
9. INSPECT CRANKSHAFT TIMING SPROCKET
(a) Place the chain around the sprocket.
(b) Using a vernier caliper, measure the sprocket diameter with the chain.
Minimum sprocket diameter (with chain):
59.94 mm (2.36 in.)
If the diameter is less than the minimum, replace the chain and crankshaft timing sprocket.
HINT
The vernier caliper must contact the chain rollers for the measurement.
10. INSPECT NO. 1 CHAIN TENSIONER ASSEMBLY
(a) Move the stopper plate counterclockwise to release the lock. Push the plunger and check that it moves smoothly.
If necessary, replace the No. 1 chain tensioner assembly.
11. INSPECT CHAIN TENSIONER SLIPPER
(a) Measure the worn depth of the chain tensioner slipper.
Text in Illustration
Maximum depth:
1.0 mm (0.0394 in.)
If the depth is more than the maximum, replace the chain tensioner slipper.
12. INSPECT NO. 1 CHAIN VIBRATION DAMPER
(a) Measure the worn depth of the chain vibration damper.
Text in Illustration
Maximum depth:
1.0 mm (0.0394 in.)
If the depth is more than the maximum, replace the No. 1 chain vibration damper.
13. INSPECT TIMING CHAIN GUIDE
(a) Measure the worn depth of the timing chain guide.
Text in Illustration
Maximum depth:
1.0 mm (0.0394 in.)
If the depth is more than the maximum, replace the timing chain guide.
14. INSPECT NO. 1 BALANCE SHAFT THRUST CLEARANCE
(a) Using a dial indicator, measure the thrust clearance while moving the No. 1 balance shaft back and forth.
Standard thrust clearance:
0.05 to 0.09 mm (0.00197 to 0.00354 in.)
Maximum thrust clearance:
0.09 mm (0.00354 in.)
If the thrust clearance is more than the maximum, replace the engine balancer assembly.
15. INSPECT NO. 2 BALANCE SHAFT THRUST CLEARANCE
(a) Using a dial indicator, measure the thrust clearance while moving the No. 2 balance shaft back and forth.
Standard thrust clearance:
0.05 to 0.09 mm (0.00197 to 0.00354 in.)
Maximum thrust clearance:
0.09 mm (0.00354 in.)
If the thrust clearance is more than the maximum, replace the engine balancer assembly.
16. INSPECT BALANCE SHAFT BACKLASH
(a) Secure the No. 2 balance shaft in place, and then using a dial indicator, measure the backlash of the No. 1 and No. 2 balance shafts as shown in the illustration.
Text in Illustration
Standard backlash:
0.04 to 0.17 mm (0.00157 to 0.00669 in.)
Maximum backlash:
0.17 m (0.00669 in.)
NOTICE:
Measure at 3 or more areas around the circumference of the No. 1 and No. 2 balance shafts.
If the backlash is more than the maximum, replace the engine balancer assembly.
17. INSPECT CYLINDER HEAD BOLT
(a) Using a vernier caliper, measure the diameter of the threads at the measurement point.
Text in Illustration
Standard diameter:
10.85 to 11.00 mm (0.427 to 0.433 in.)
Minimum diameter:
10.6 mm (0.417 in.)
Measurement point (distance from the seat):
106 mm (4.17 in.)
HINT
* If the diameter is less than the minimum, replace the cylinder head bolt. Failure to do so may lead to engine damage.
* If there is any thread deformation, replace the cylinder head bolt with a new one.
18. INSPECT EXHAUST MANIFOLD CONVERTER SUB-ASSEMBLY
(a) Using a precision straightedge and feeler gauge, measure the warpage of the surface that contacts the cylinder head.
Maximum warpage:
0.7 mm (0.0276 in.)
If the warpage is more than the maximum, replace the exhaust manifold.