LS 460 AWD V8-4.6L (1UR-FSE) (2009)
/Page-945001.png)
Timing Chain: Testing and Inspection
1UR-FSE ENGINE MECHANICAL: TIMING CHAIN: INSPECTION
INSPECTION
1. INSPECT CHAIN SUB-ASSEMBLY
(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33 lbf) as shown the illustration.
(b) Using a vernier caliper, measure the length of 15 pins.
Maximum chain elongation:
136.9 mm (5.389 in.)
If the elongation is greater than the maximum, replace the chain.
NOTE:
Perform the measurement at 3 random places.
2. INSPECT NO. 2 CHAIN SUB-ASSEMBLY
(a) Using a spring scale, pull the chain with a force of 147 N (15 kgf, 33 lbf) as shown the illustration.
(b) Using a vernier caliper, measure the length of 15 pins.
Maximum chain elongation:
137.6 mm (5.417 in.)
If the elongation is greater than the maximum, replace the chain.
NOTE:
Perform the measurement at 3 random places.
3. INSPECT CRANKSHAFT TIMING GEAR
(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 (2.417 in.)
HINT: The vernier caliper must contact the chain rollers for the measurement.
If the diameter is less than the minimum, replace the chain and sprocket.
4. INSPECT CRANKSHAFT TIMING SPROCKET LH
