Overhaul
DISASSEMBLY1. For ease in servicing cylinder head, remove distributor gear case, intake manifold with throttle body and exhaust manifold from cylinder head.
2. Remove camshaft as previously outlined and remove rocker arms and washers by pulling its shaft out to transmission side.
3. Using special tool (Valve lifter), compress valve springs and then remove valve cotters by using special tool (Forceps) as shown.
Special Tool:
(A): 09916-14510 or equivalent
(B): 09916-14910 or equivalent
(C): 09916-84510 or equivalent
4. Release special tool, and remove spring retainer and valve spring.
5. Remove valve from combustion chamber side.
6. Remove valve stem oil seal from valve guide, and then valve spring seat.
NOTE: Do not reuse oil seal once disassembled. Be sure to use new oil seal when assembling.
7. Using special tool (Valve guide remover), drive valve guide out from combustion chamber side to valve spring side.
Special Tool (A): 09916-44910 or equivalent.
NOTE: Do not reuse valve guide once disassembled. Be sure to use new valve guide (Oversize) when assembling.
8. Place disassembled parts except valve stem seal and valve guide in order, so that they can be installed in their original position.
ASSEMBLY
1. Before installing valve guide into cylinder head, ream guide hole with special tool (11 mm reamer) so remove burrs and make it truly round.
Special Tool:
(A): 09916-34541 or equivalent.
(B): 09916-38210 or equivalent.
2. Install valve guide to cylinder head. Heat cylinder head uniformly at a temperature of 80 to 100°C (176 to 212°F) so that head will not be distorted, and drive new valve guide into hole with special tools. Drive in new valve guide until special tool (Valve guide installer) contacts cylinder head. After installing, make sure that valve guide protrudes by 11.5 mm (0.45 inch) from cylinder head.
Special Tool:
(C): 09916-56011 or equivalent
(D): 09916-58210 or equivalent
Valve Guide Oversize: 0.03 mm (0.0012 inch)
Valve Guide Protrusion (Intake and Exhaust): 11.5 mm (0.45 inch).
NOTE:
^ Do not reuse valve guide once disassembled. Install new valve guide (Oversize)
^ Intake and exhaust valve guides are identical
3. Ream valve guide bore with special tool (5.5 mm reamer). After reaming, clean bore.
Special Tool:
(A): 09916-34541 or equivalent
(B): 09916-34550 or equivalent
4. Install valve spring seat to cylinder head.
5. Install new valve stem seal to valve guide. After applying engine oil to seal and spindle of special tool (Valve guide installer handle), fit oil seal to spindle, and then install seal to valve guide by pushing special tool by hand. After installing, check to be sure that seal is properly fixed to valve guide.
Special Tool:
(A): 09917-98221 or equivalent
(B): 09916-58210 or equivalent
NOTE:
^ Do not reuse seal once disassembled. Be sure to install new seal.
^ When installing, never tap or hit special tool with a hammer or else. Install seal to guide only by pushing special tool by hand. Tapping or hitting special tool may cause damage to seal.
6. Install valve to valve guide. Before installing valve to valve guide, apply engine oil to stem seal, valve guide bore, and valve stem.
7. Install valve spring and spring retainer. Each valve spring has top end (large-pitch end) and bottom end (small-pitch end). Be sure to position spring in place with its bottom end (small-pitch end) facing the bottom (valve spring seat side).
8. Using special tool (Valve lifter), compress valve spring and fit two valve cotters into groove in valve stem.
Special Tool:
(A): 09916-14510 or equivalent
(B): 09916-14910 or equivalent
(C): 09916-84510 or equivalent
9. Install rocker arms, washers, rocker arm shaft and camshaft as previously outlined.
10. Install distributor gear case, intake manifold and exhaust manifold.