1D
Valves and Cylinder Head Disassembly and Assembly
Reference: Valves and Cylinder Head Removal and Installation:M13A
Disassembly
1) For ease in servicing cylinder head, remove intake manifold, injectors and exhaust manifold from cylinder head.
2) Using special tools (Valve lifter), compress valve spring and then remove valve cotters (1) also by using special tool (Forceps).
Special Tool
(A) : 09916–14510
(B) : 09916–14521
(C) : 09916–84511
3) Release special tools and remove spring retainer and valve spring.
4) Remove valve from combustion chamber side.
5) Remove valve stem seal (1) from valve guide and then valve spring seat (2).
NOTE:
Do not reuse seal once disassembled. Be sure to use new seal when assembling.
6) Using special tool (Valve guide remover), drive valve guide out from combustion chamber side to valve spring side.
Special Tool
(A) : 09916–44910
NOTE:
Do not reuse valve guide once disassembled. Be sure to use new valve guide (oversize) when assembling.
7) Place disassembled parts except valve stem seal and valve guide in order so that they can be installed in their original position.
Assembly
Reference: Valves and Valve Guides Inspection:M13A
Reference: Cylinder Head Inspection:M13A
1) Before installing valve guide into cylinder head, ream guide hole with special tool (10.5 mm reamer) so as to remove burrs and make it truly round.
Special Tool
(A) : 09916–34542
(B) : 09916–37320
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 specified dimension “a” from cylinder head.
Special Tool
(A) : 09916–58210
(B) : 09916–56011
NOTE:
• Do not reuse once-disassembly valve guide. Make sure to install new valve guide.
• Intake and exhaust valve guides are identical.
Valve guide protrusion (In and Ex)
“a”: 11.3 mm (0.44 in.)
3) Ream valve guide bore with special tool (5.5 mm reamer). After reaming, clean bore.
Special Tool
(A) : 09916–34542
(B) : 09916–34550
4) Install valve spring seat to cylinder head.
5) Install new valve stem seal (1) 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
(B) : 09916–58210
NOTE:
• Do not reuse seal once-disassembled. Be sure to install new seal.
• When installing, do not 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 (1)) and bottom end (small-pitch end (2)). Be sure to position spring in place with its bottom end (small-pitch end) facing the bottom (valve spring seat side).
A: Valve spring retainer side B: Valve spring seat side
8) Using special tools (Valve lifter), compress valve spring and fit two valve cotters (1) into groove in valve stem.
NOTE:
When compressing the valve spring, do not damage inside face of tappet installing hole.
Special Tool
(A) : 09916–14510
(B) : 09916–14521
(C) : 09916–84511
9) Install intake manifold referring to Intake Manifold Removal and Installation:M13A .
10) Install fuel injectors referring to Fuel Injector Removal and Installation:M13A .
11) Install exhaust manifold referring to Exhaust Manifold Removal and Installation:M13A .