CYLINDER HEAD : Disassembly & Assembly: Assembly

WARNING: This page is about a different variant/trim than selected.

When valve guide is removed, install it using the following procedure:

CAUTION: Replace with oversize [0.2 mm (0.008 in)] valve guide.

Ream cylinder head valve guide hole using suitable tool (A).

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For service parts: Oversize [0.2 mm (0.008 in)]

: Refer to Service Data .

Heat cylinder head to 110 deg. C to 130 deg. C (230 deg. F to 266 deg. F) by soaking in heated engine oil (A).

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WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.

Press valve guide (1) into cylinder head (2) from camshaft side to dimension as shown.

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Projection (H)

: Refer to Service Data .

Apply reamer finish to valve guide using suitable tool (A).

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When valve seat is removed, install it using the following procedure:

Ream cylinder head (1) recess diameter for service valve seat (2).

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Be sure to ream in circles concentric to the valve guide center. This will enable valve seat to fit correctly.

For service parts: Oversize [0.5 mm (0.020 in)]

: Refer to Service Data .

Heat cylinder head to 110 deg. C to 130 deg. C (230 deg. F to 266 deg. F) by soaking in heated engine oil (A).

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WARNING: Cylinder head contains heat. When working, wear protective equipment to avoid getting burned.

Press-fit valve seat into cylinder head.

Finish valve seat to the specified dimension using suitable tool. Refer to Service Data .

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CAUTION: When using valve seat cutter, firmly grip the cutter handle with both hands. Then, press on the contacting surface all around the circumference to cut in a single drive. Improper pressure on the cutter or cutting many different times may result in stage valve seat.

Using compound, grind to adjust valve.
Check again for normal contact. Refer to Inspection .

Apply new engine oil to new valve oil seal joint surface and seal lip.

Install new valve oil seal using suitable tool (A) as shown.

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NOTE: Dimension is height measured before installing valve spring (with valve spring seat).

Projection (H)

: Refer to Inspection .

Install valve.
- Install larger diameter to intake side.

Install valve spring with valve spring seat (1).

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Install valve spring so that the identification color faces upward (A).
Install smaller pitch to cylinder head side (B).

Confirm the identification color of the valve spring.

Valve spring

: Purple

Install valve spring retainer.

Install valve collet.

Compress the valve spring with suitable tool (A), (B) and (C) and install the valve collet with a suitable magnetic tool.

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CAUTION:

Be careful not to damage valve lifter holes.

The center of the suitable tool (A) and valve spring retainer (1) must be aligned.

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Tap valve stem edge lightly with a plastic hammer after installation to check its installed condition.

Install valve lifter.

Install spark plug tube.

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Remove old liquid gasket from cylinder head mounting hole.
Apply liquid gasket all around on spark plug tube on the press fit range (A) side.
- Use Genuine High Strength Thread Locking Sealant or equivalent. Refer to HOW TO USE THIS INFORMATION : Recommended Chemical Products and Sealants .

Press fit spark plug tube so that height (H) is as shown.

Press fit height (H) standard value

: 41.2 - 42.2 mm (1.622 - 1.661 in)

CAUTION:

When press fitting be careful not to deform spark plug tube.
After press fitting, wipe off any protruding thread locking sealant on top surface of cylinder head.

Install spark plug. Refer to Exploded View .