ADJUSTMENT
Note. Inspect and adjust the valve clearance when the engine is cold.
Scheme 13
Scheme 14
Scheme 15
Scheme 16
Scheme 17
Scheme 18
Scheme 19
Scheme 20
Scheme 21
Scheme 22
Scheme 23
Scheme 24
Scheme 25
Scheme 26
Scheme 27
Scheme 28
Scheme 29
Scheme 30
Scheme 31
Scheme 32
Scheme 33
Scheme 34
- Remove RH engine under cover .
- Remove air cleaner assembly (See «REMOVAL»(ref-159218-S10694829132005060800000) ).
- Remove cylinder head cover (See «REMOVAL»(ref-159218-S13219462912005060800000) ) .
- Set No. 1 cylinder to TDC/compression . Turn the crankshaft pulley, and align its groove with timing mark 0 of the timing chain cover. Check that the timing marks of the camshaft timing sprocket and VVT timing sprocket are aligned with the timing marks of the No. 1 and No. 2 bearing caps as shown in the illustration. If not, turn the crankshaft 1 revolution (360°) and align the marks as above.
- Inspect valve clearance . Check only the valves indicated. Using a feeler gauge, measure the clearance between the valve lifter and camshaft. Record the out-of-specification valve clearance measurements. They will be used later to determine the required replacement adjusting valve lifter. Valve clearance (Cold): Turn the crankshaft 1 revolution (360°) and align the mark as above (See step 4 ). Check only the valves indicated as shown. Measure the valve clearance (See a ).
- Adjust valve clearance . Set the No. 1 cylinder to the TDC/compression (See step 4 ). Place matchmarks on the timing chain and camshaft timing sprockets. Remove the 2 nuts, gasket and chain tensioner. Hold the hexagonal head portion of the camshaft with a wrench, and loosen the camshaft timing sprocket bolt. NOTE: Be careful not to damage the cylinder head and valve lifter with the wrench. Uniformly loosen and remove the 10 camshaft bearing cap bolts in several passes, in the sequence shown. Remove the 5 camshaft bearing caps. Raising the camshaft, remove the camshaft timing sprocket bolt. Disconnect the camshaft timing sprocket together with the timing chain from the exhaust camshaft. Remove the camshaft timing sprocket from the timing chain. Uniformly loosen and remove the 10 camshaft bearing cap bolts in several passes, in the sequence shown. Remove the 5 camshaft bearing caps. Disconnect the timing chain from the VVT timing sprocket, and remove the intake camshaft with the VVT timing sprocket. Tie the timing chain as shown in the illustration. NOTE: Be careful not to drop anything inside the timing chain cover. Do not allow the chain to come into contact with water or dust. Remove the valve lifter. Determine the replacement valve lifter size according to these Formula or Charts: Using a micrometer, measure the thickness of the removed lifter. Calculate the thickness of a new lifter so the valve clearance comes within the specified value. Thickness of used lifter Measured valve clearance Thickness of new lifter Select a new lifter with a thickness as close as possible to the calculated values. NOTE: Valve 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.). Identification number inside the valve lifter shows the value of the 2 decimal places. (The illustration shows 5.380 mm (0.2118 in.) Valve Lifter Selection Chart (Intake) Valve Lifter Selection Chart (Exhaust) Apply a light coat engine oil to new valve lifter. Reinstall the valve lifter. Align the crankshaft pulley groove with timing mark 0 of the timing chain cover. Hold the timing chain.
- Reinstall intake camshaft . Align the matchmarks on the timing chain and VVT timing sprocket (See b under step 6), and place the intake camshaft on the cylinder head. Apply a light coat engine oil on the threads and under the camshaft bearing cap bolts. Install the 5 intake camshaft bearing caps in their proper locations (See «INSTALLATION»(ref-159218-S31817310542005060800000) ). Uniformly tighten the 10 bearing cap bolts in several passes, in the sequence shown. Torque: 29.5 N.m (300 kgf. cm, 22 ft. lbf) for bolt A 9 N.m (90 kgf. cm, 80 in. .lbf) for others Align the matchmarks on the timing chain and camshaft timing sprocket (See b under step 6), and install them.
- Reinstall exhaust camshaft. . Temporarily install the camshaft timing sprocket with the timing chain to the exhaust camshaft with the bolt. Place the exhaust camshaft on the cylinder head. Apply a light coat engine oil on the threads and under the camshaft bearing cap bolts. Install the 5 exhaust camshaft bearing caps in their proper locations (See «INSTALLATION»(ref-159218-S31817310542005060800000) ). Uniformly tighten the 10 bearing cap bolts in several passes, in the sequence shown. Torque: 29.5 N.m (300 kgf. cm, 22 ft. lbf) for bolt A 9 N.m (90 kgf. cm, 80 in. .lbf) for others Hold the hexagon head portion of the exhaust camshaft with a wrench, and tighten the bolt. Torque: 54 N.m (550 kgf. cm, 40 ft. lbf) Check that each sprocket aligns with the matchmarks as shown. Install the chain tensioner (See «INSTALLATION»(ref-159218-S28145665832005060800000) ). Recheck the valve clearance (See step 5 ). Check the valve timing (See «INSTALLATION»(ref-159218-S28145665832005060800000) ).
- Reinstall cylinder head cover (See «INSTALLATION»(ref-159218-S28145665832005060800000) ) .
- Reinstall air cleaner assembly (See «REMOVAL»(ref-159218-S10694829132005060800000) ) .
- Reinstall RH engine under cover .
