Valve Clearance: Adjustments
2UR-GSE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT
1. REMOVE FUEL PUMP ASSEMBLY (for Bank 1)
Removal
2. REMOVE FUEL PUMP ASSEMBLY (for Bank 2)
Removal
3. DISCONNECT WIRE HARNESS Removal
4. REMOVE IGNITION COIL ASSEMBLY Removal
5. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH (for Bank 1) Disassembly
6. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY (for Bank 2) Disassembly
7. REMOVE OIL REFLECTOR PLATE LH (for Bank 1) Disassembly
8. REMOVE OIL REFLECTOR PLATE RH (for Bank 2) Disassembly
9. REMOVE NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Rotate the crankshaft clockwise to set the No. 1 cylinder to TDC compression by aligning the crankshaft pulley timing mark (notch) with the timing chain cover 0° position.
(b) Check that each timing mark is positioned as shown in the illustration.
HINT
If the timing marks are not positioned as shown in the illustration, rotate the crankshaft 360° to align the timing marks.
10. INSPECT VALVE CLEARANCE
(a) Using a feeler gauge, measure the clearance between the indicated valve rocker arms and camshafts.
Standard Valve Clearance (Cold):
HINT
* On this engine, valve clearance is measured between the valve rocker arms and the camshaft lobes. The shims used to adjust the valve clearance are located on the top of the valve stems.
* The valve clearance shown in the Standard Valve Clearance table is the clearance as measured between the cam lobe and valve rocker arm.
* Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve adjusting shim.
(b) Turn the crankshaft 1 revolution (360°) to set the No. 6 cylinder to TDC compression.
(c) Using a feeler gauge, measure the clearance between the indicated valve rocker arms and camshafts.
Standard Valve Clearance (Cold):
HINT
* On this engine, valve clearance is measured between the valve rocker arms and the camshaft lobes. The shims used to adjust the valve clearance are located on the top of the valve stems.
* The valve clearance shown in the Standard Valve Clearance table is the clearance as measured between the cam lobe and valve rocker arm.
* Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve adjusting shim.
11. ADJUST VALVE CLEARANCE
(a) Remove the timing chain cover sub-assembly Removal.
(b) Remove the camshaft Removal.
(c) Raise the valve rocker arm above the shim being replaced, and remove the valve adjusting shim.
NOTICE:
* Be careful not to drop the adjusting shim into the cylinder head.
* To prevent damage, do not attempt to adjust valve clearance by tightening or loosening the valve rocker arm pivots.
HINT
Arrange the removed parts in the correct order.
(d) Using a dial gauge, measure the thickness of the existing valve adjusting shim after removing it.
HINT
Be careful not to measure at the valve adjusting shim center groove.
(e) Determine the replacement valve adjusting shim thickness according to the formula or charts below.
(1) Calculate the thickness of the replacement valve adjusting shim so that the valve clearance comes within the specified value.
Valve clearance:
Intake
T2 = T1 + (A - 0.15 mm (0.0059 in.)) x 1.8
Exhaust
T2 = T1 + (A - 0.25 mm (0.0098 in.)) x 1.6
HINT
* Select a replacement shim with a thickness as close to the calculated value as possible.
* Shims are available in 41 sizes in increments of 0.020 mm (0.0008 in.), from 2.000 mm (0.0787 in.) to 2.800 mm (0.1102 in.).
* To select a replacement valve adjusting shim, refer to the following Valve Adjusting Shim Selection Chart and New Shim Thickness tables.
Intake valve clearance (Cold):
0.12 to 0.18 mm (0.00472 to 0.00709 in.)
EXAMPLE:
If the existing shim (installed shim) is 2.300 mm (0.0906 in.), and the measured clearance is 0.39 mm (0.0154 in.), then a new 2.740 mm (0.1079 in.) No. 74 shim should be used as a replacement for the existing shim.
New Shim Thickness mm (in.)
Exhaust valve clearance (Cold):
0.22 to 0.28 mm (0.00866 to 0.0110 in.)
EXAMPLE:
If the existing shim (installed shim) is 2.300 mm (0.0906 in.), and the measured clearance is 0.39 mm (0.0154 in.), then a new 2.520 mm (0.0992 in.) No. 52 shim should be used as a replacement for the existing shim.
New Shim Thickness mm (in.)
(f) Install the camshaft Installation.
(g) Install the chain sub-assembly Reassembly.
(1) Install the chain sub-assembly (for Bank 2).
(2) Install the No. 1 chain vibration damper (for Bank 2).
(3) Install the chain tensioner slipper (for Bank 2).
(4) Install the No. 1 chain tensioner assembly (for Bank 2).
(5) Install the chain sub-assembly (for Bank 1).
(6) Install the No. 1 chain vibration damper (for Bank 1).
(7) Install the chain tensioner slipper (for Bank 1).
(8) Install the No. 1 chain tensioner assembly (for Bank 1).
Tighten the camshaft timing gear assembly.
(h) Inspect the valve clearance again.
NOTICE:
Be sure to inspect the valve clearance with the chain cub-assembly installed. When rotating the camshaft without the chain sub-assembly installed, contact between the valves and pistons may occur.
HINT
If the valve clearance is not as specified, readjust the valve clearance.
12. INSTALL OIL REFLECTOR PLATE LH (for Bank 1) Reassembly
13. INSTALL OIL REFLECTOR PLATE RH (for Bank 2) Reassembly
14. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY LH (for Bank 1) Reassembly
15. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY (for Bank 2) Reassembly
16. INSTALL IGNITION COIL ASSEMBLY Installation
17. CONNECT WIRE HARNESS Installation
18. INSTALL FUEL PUMP ASSEMBLY (for Bank 1)
Installation
19. INSTALL FUEL PUMP ASSEMBLY (for Bank 2)
Installation