Rocker Arm Assembly: Service and Repair
REMOVAL
1. Disconnect negative cable at battery.
2. Remove timing belt.
3. Remove camshaft timing belt pulley by using special tool.
Special Tool (A): 09917-68220
4. Remove cylinder head cover.
5. Remove ignition coils and then CMP sensor case from cylinder head with CMP sensor coupler disconnected. Place a container or rag under CMP sensor case, for a small amount of oil flows out during removal of case.
6. After loosening all valve adjusting screw lock nuts, turn adjusting screws back all the way to allow all rocker arms to move freely.
7. Remove camshaft housing and camshaft.
NOTE: To remove camshaft housing bolts, loosen them in such order as indicated in figure, a little at a time.
8. Remove rocker arm shaft plug and timing belt inside cover.
9. Remove intake rocker arm with clip from rocker arm shaft.
NOTE: Do not bend clip when removing intake rocker arm.
10. Remove rocker arm shaft bolts.
11. Push off rocker arm shaft end to ignition coils side and remove O-ring from shaft.
12. Remove exhaust rocker arms and rocker arm spring by pulling rocker arm shaft to front side.
INSPECTION
Cam Wear
Using a micrometer, measured height of cam. If measured height is below limit, replace camshaft.
INSTALLATION
1. Apply engine oil to rocker arm shaft and rocker arms.
2. Install rocker arm shaft, rocker arm (exhaust side) and rocker arm spring.
3. Check O-ring for damage or deterioration. With O-ring groove in rocker arm shaft exposed to transmission side once, install O-ring to rocker arm shaft.
4. Set rocker arm shaft so that its cut part faces down and becomes in parallel with head cover mating surface.
5. Install rocker arm shaft bolts and tighten them to specified torque.
Tightening Torque (a): 11 Nm (8.0 ft. lbs.)
6. Fill small amount of engine oil into arm pivot holding part of rocker arm shaft. Install rocker arm (intake side) with clips to rocker arm shaft.
7. Apply engine oil to cams and journals on camshaft and put camshaft on cylinder head. Install camshaft housing to camshaft and cylinder head.
- Apply engine oil to sliding surface of each housing against camshaft journal.
- Apply sealant to mating surface of No.6 housing which will mate with cylinder head.
"A" Sealant: 99000-31110
- Embossed marks are provided on each camshaft housing, indicating position and direction for installation. Install housings as indicated by these marks.
- As camshaft housing No. 1 retains camshaft in proper position as to thrust direction, make sure to first fit No. 1 housing to No. 1 journal of camshaft securely.
- After applying engine oil to housing bolts, tighten them temporarily first. Then tighten them by following sequence as indicated in figure.
Tighten a little at a time and evenly among bolts and repeat tightening sequence three to four times before they are tightened to specified torque.
Tightening Torque (a): 11 Nm (8.0 ft. lbs.)
8. Install camshaft oil seal. After applying engine oil to oil seal lip, press-fit camshaft oil seal till oil seal surface becomes flush with housing surface.
9. Install rocker arm shaft plug and timing belt inside cover. Then tighten rocker arm shaft plug to specified torque.
Tightening Torque (a): 33 Nm (24.0 ft. lbs.)
10. Install camshaft timing belt pulley to camshaft while fitting pin on camshaft into slot at "E" mark.
11. Using special tool, tighten pulley bolt to specified torque.
Tightening Torque (a): 60 Nm (43.5 ft. lbs.)
Special Tool (A): 09917-68220
12. Install belt tensioner, timing belt, outside cover, crankshaft pulley, water pump belt and engine right mounting bracket and stiffener.
13. After applying sealant to part "A" as shown in figure at the left, install CMP sensor case to cylinder head and tighten its fixing bolts to specified torque.
"A" Sealant: 99000-31110
Tightening Torque (a): 11 Nm (8.0 ft. lbs.)
Install ignition coil assembly.
14. Adjust valve clearance.
15. Install cylinder head cover.
16. Connect negative cable at battery.
17. Confirm that ignition timing is within specification.