LS 460 AWD V8-4.6L (1UR-FSE) (2009)
1UR-FSE ENGINE MECHANICAL: CYLINDER HEAD GASKET (for Bank 2): REMOVAL
REMOVAL
1. DISCHARGE FUEL SYSTEM PRESSURE See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Injector/Service and Repair/Fuel
Injector (for Port Injection)/Removal
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt
pretensioner activation.
NOTE:
After the engine switch is turned off, the HDD navigation system requires approximately 6 minutes to record various types of memory and
settings. As a result, after turning the engine switch off, wait 6 minutes or more before disconnecting the cable from the negative (-) battery
terminal.
3. REMOVE CAMSHAFT (for Bank 2)
(a) Remove the camshaft See: Camshaft, Lifters and Push Rods/Camshaft/Service and Repair/Camshaft (for Bank 2)/Removal.
4. REMOVE NO. 1 VALVE ROCKER ARM SUB-ASSEMBLY
(a) Remove the 16 valve rocker arms from the cylinder head.
HINT: Arrange the removed parts in the correct order.
5. REMOVE VALVE LASH ADJUSTER ASSEMBLY
(a) Remove the 16 valve lash adjusters from the cylinder head.
HINT: Arrange the removed parts in the correct order.
6. REMOVE VALVE STEM CAP
(a) Remove the 16 valve stem caps from the cylinder head.
HINT: Arrange the removed parts in the correct order.
7. REMOVE CYLINDER HEAD SUB-ASSEMBLY (for Bank 2)
(a) Uniformly loosen and remove the 2 bolts in the sequence shown in the illustration.
(b) Using a 10 mm bi-hexagon wrench, uniformly loosen the 10 bolts in the sequence shown in the illustration. Remove the 10 cylinder head bolts
and plate washers.
-
Be careful not to drop washers into the cylinder head.
-
Head warpage or cracking could result from removing bolts in an incorrect order.
HINT: Be sure to keep the removed parts separate for each installation position.
(c) Remove the cylinder head and gasket.
Installation
1UR-FSE ENGINE MECHANICAL: CYLINDER HEAD GASKET (for Bank 2): INSTALLATION
INSTALLATION