Camshaft
Camshaft
REMOVAL
NOTE: When replacing the single part, perform the work with the engine installed to body. Refer to "Valve Clearance" for preparation procedures.
1. Remove the V-belts.
2. Remove the crank pulley.
3. Remove the timing belt cover.
4. Remove the timing belt.
5. Remove the cam sprocket.
6. Remove the timing belt cover No. 2 LH. 7.Remove the timing belt cover No. 2 RH.
NOTE: Do not damage or lose the seal rubber when removing the timing belt covers.
8. Remove the tensioner bracket.
9. Remove the camshaft position sensor support. (LH side only)
10. Remove the valve rocker assembly.
11. Remove the camshaft cap.
1. Remove the bolts (a) and (b) in alphabetical sequence.
2. Equally loosen the bolts (c) through (j) all the way in alphabetical sequence.
3. Remove the bolts (k) through (p) in alphabetical sequence using ST.
ST 499497000 TORX PLUS
4. Remove the camshaft cap.
12. Remove the camshaft.
13. Remove the oil seal.
14. Remove the plug from rear side of camshaft.
CAUTION: Do not scratch the journal surface when removing the oil seal.
15. Similarly, remove the camshaft RH and related parts.
INSTALLATION
1. Apply a thin coat of engine oil to camshaft journals, and install the camshaft.
2. Install the camshaft cap.
1. Apply liquid gasket to the mating surfaces of camshaft cap.
NOTE: Install within 5 minutes after applying liquid gasket.
Liquid gasket: THREE BOND 1217G (Part No. K0877Y0100) or equivalent
NOTE: Apply a coat of liquid gasket of 3 mm (0.12 in) in diameter (A) along the edge (B) of camshaft cap (C) mating surface.
2. Temporarily tighten the bolts (a) through (d) in alphabetical sequence.
3. Install the valve rocker assembly.
4. Tighten the TORX bolts through (j) in alphabetical sequence using ST.
ST 499497000 TORX PLUS
Tightening torque: 18 N-m (1.8 kgf-m, 13.3 ft-lb)
5. Tighten the bolts (k) through (r) in alphabetical sequence.
Tightening torque: 9.75 N-m (1.0 kgf-m, 7.2 ft-lb)
6. Tighten the bolts (s) and (t) in alphabetical sequence.
NOTE:
^ Use new seal washer.
^ Install and tighten the seal washer to the bolt.
Tightening torque: 9.75 N-m (1.0 kgf-m, 7.2 ft-lb)
3. Apply a coat of engine oil to camshaft oil seal periphery and oil seal lips and install the oil seal (A) on camshaft using ST1 and ST2.
NOTE: Use a new oil seal.
ST1 499597000 OIL SEAL GUIDE
ST2 499587500 OIL SEAL INSTALLER
4. Apply a coat of engine oil to plug periphery and
Install the plug (A) using ST.
ST 499587700 CAMSHAFT OIL SEAL INSTALLER
5. Install the camshaft position sensor support. (LH side only)
Tightening torque: 6.4 N-m (0.7 kgf-m, 4.7 ft-lb)
6. Similarly, install the parts on right-hand side.
7. Install the tensioner bracket.
Tightening torque: 24.5 N-m (2.5 degrees, kgf-m, 18.1 ft-lb)
8. Install the timing belt cover No. 2 RH.
Tightening torque: 5 N-m (0.5 kgf-m, 3.7 ft-lb)
9. Install the timing belt cover No. 2 LH.
Tightening torque: 5 N-m (0.5 kgf-m, 3.7 ft-lb)
10. Install the cam sprocket.
11. Install the timing belt.
12. Adjust the valve clearance.
13. Install the rocker cover.
1. Install the rocker cover gasket to the rocker cover.
NOTE: Use a new rocker cover gasket.
2. Temporarily tighten the bolts in alphabetical order shown in the figure, tighten them in two stages.
Tightening torque:
1st 6.4 N-m (0.7 kgf-m, 4.7 ft-lb)
2nd (only (a) and (b) are tightened) 6.4 N-m (0.7 kgf-m, 4.7 ft-lb)
RH side
LH side
3. Connect the PCV hose.
14. Install the high tension cord.
15. Install the timing belt cover.
16. Install the crank pulley.
17. Install the V-belts.
INSPECTION
1. Measure the bend, and repair or replace if necessary.
Service limit. 0.025 mm (0.00098 in) or less
2. Check the journal for damage and wear. Replace if faulty.
3. Measure the outer diameter of camshaft journal and inner diameter of cylinder head journal, and check the difference (oil clearance) between the two values. If the oil clearance is not within the standard, replace the camshaft or cylinder head as necessary.
Oil clearance Standard 0.055 - 0.090 (0.0022 - 0.0035)
Camshaft journal O.D. 31.928 - 31.945 (1) 2570 - 1.2577)
Journal hole I D. 32.000 - 32.018 (1) 2598 - 1.2605)
4. Check the cam face condition, and remove the minor faults by grinding with oil stone. Measure the cam height H. If it exceeds the standard or offset wear occurs, replace it.
Cam height H:
Intake
Constant Standard 40.075 - 40.175 (1) 5778 - 1.5817)
Low speed Standard 35.496 - 35.596 (1) 3975 - 1.4014)
High speed Standard 40.315 - 40.415 (1) 5872 - 1.5911)
Exhaust Standard 39.289 - 39.389 (1) 5468 - 1.5507)
Cam base circle diameter A:
Intake 34.00 mm (1.3386 in)
Exhaust 34.00 mm (1.3386 in)
Base circle step of adjacent intake cams (low speed and high speed): 0.03 mm (0.001 in) or less
5. Measure the thrust clearance of camshaft with setting the dial gauge at end of camshaft. If the thrust clearance is not within the standard or there is offset wear, replace the camshaft caps and cylinder head as a set. If necessary, replace the camshaft.
Standard: 0.030 - 0.090 mm (0.0012 - 0.0035 in)