Valve Clearance: Adjustments
1GR-FE ENGINE MECHANICAL: VALVE CLEARANCE: ADJUSTMENT
ADJUSTMENT
1. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
2. DRAIN ENGINE COOLANT Service and Repair
3. REMOVE V-BANK COVER Removal
4. REMOVE AIR CLEANER ASSEMBLY Removal
5. REMOVE THROTTLE BODY BRACKET Removal
6. REMOVE OIL BAFFLE PLATE Removal
7. REMOVE NO. 1 SURGE TANK STAY Removal
8. REMOVE NO. 2 SURGE TANK STAY Removal
9. REMOVE INTAKE AIR SURGE TANK Removal
10. REMOVE IGNITION COIL ASSEMBLY Removal
11. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY Removal
12. REMOVE CYLINDER HEAD COVER SUB-ASSEMBLY LH Removal
13. SET NO. 1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley until its groove and the "0" timing mark of the timing chain cover are aligned.
(b) Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing caps as shown in the illustration.
If not, turn the crankshaft 1 complete revolution (360°) and align the timing marks above.
14. INSPECT VALVE CLEARANCE
(a) Check the valves indicated in the illustration.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
Intake 0.15 to 0.25 mm (0.006 to 0.010 in.)
Exhaust 0.29 to 0.39 mm (0.011 to 0.015 in.)
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifter.
(b) Turn the crankshaft 240° clockwise, and check the valves indicated in the illustration.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
Intake 0.15 to 0.25 mm (0.006 to 0.010 in.)
Exhaust 0.29 to 0.39 mm (0.011 to 0.015 in.)
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifter.
(c) Turn the crankshaft 240° clockwise, and check the valves indicated in the illustration.
(1) Using a feeler gauge, measure the clearance between the valve lifter and camshaft.
Valve clearance (Cold):
Intake 0.15 to 0.25 mm (0.006 to 0.010 in.)
Exhaust 0.29 to 0.39 mm (0.011 to 0.015 in.)
(2) Record any out-of-specification valve clearance measurements. They will be used later to determine the required replacement valve lifter.
15. ADJUST VALVE CLEARANCE
(a) Set the No. 1 cylinder to TDC/compression.
(1) Turn the crankshaft pulley until its groove and the "0" timing mark of the timing chain cover are aligned.
(2) Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing caps as shown in the illustration.
If not, turn the crankshaft 1 complete revolution (360°) and align the timing marks as above.
(3) Place paint marks on the No. 1 chain links corresponding to the timing marks of the camshaft timing gears.
(b) Remove the No. 1 chain tensioner assembly.
(c) Remove the No. 2 camshaft.
(d) Remove the No. 2 chain tensioner assembly.
(e) Remove the camshaft.
(f) Remove the No. 4 camshaft sub-assembly.
(g) Remove the No. 3 chain tensioner assembly.
(h) Remove the No. 3 camshaft sub-assembly.
(i) Remove the valve lifters.
(j) Determine the replacement valve lifter size according to the following formulas and charts:
(1) Using a micrometer, measure the thickness of the removed lifter.
(2) Calculate the thickness of a new lifter so that the valve clearance comes within the specified value.
T:
Thickness of removed lifter
A:
Measured valve clearance
N:
Thickness of new lifter
Intake:
N = T + (A - 0.20 mm (0.008 in.))
Exhaust:
N = T + (A - 0.34 mm (0.013 in.))
(3) Select a new lifter with a thickness as close as possible to the calculated value.
HINT: Lifters are available in 35 sizes in increments of 0.020 mm (0.0008 in.), from 5.060 mm (0.1992 in.) to 5.740 mm (0.2260 in.).
HINT: New lifter thickness [mm (in.)]
(k) Install the No. 3 camshaft sub-assembly.
(l) Install the No. 3 chain tensioner assembly.
(m) Install the No. 4 camshaft sub-assembly.
(n) Install the camshaft.
(o) Install the No. 2 chain tensioner assembly.
(p) Install the No. 2 camshaft.
(q) Install the No. 1 chain tensioner assembly.
(1) Check that the timing marks of the camshaft timing gears are aligned with the timing marks of the bearing cap as shown in the illustration.
16. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY LH Installation
17. INSTALL CYLINDER HEAD COVER SUB-ASSEMBLY Installation
18. INSTALL IGNITION COIL ASSEMBLY Installation
19. INSTALL INTAKE AIR SURGE TANK Installation
20. INSTALL NO. 2 SURGE TANK STAY Installation
21. INSTALL NO. 1 SURGE TANK STAY Installation
22. INSTALL OIL BAFFLE PLATE Installation
23. INSTALL THROTTLE BODY BRACKET Installation
24. INSTALL AIR CLEANER ASSEMBLY Installation
25. ADD ENGINE COOLANT Service and Repair
26. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
Torque: 3.9 Nm (40 kgf-cm, 35 in-lbf)
27. CHECK FOR ENGINE COOLANT LEAKAGE Service and Repair
28. INSPECT IGNITION TIMING On-Vehicle Inspection
29. INSTALL V-BANK COVER Installation