Valves and valve springs eng

F-10

CHECKING VALVE SEATS

1. Clear away:

• Carbon deposits (from the valve face and valve seat)

2. Check:

• Valve seats

If pitted or worn, reface the valve seat

3. Measure:

• Valve seat width §a

if not as specified, reface the valve seat

	Valve seat width: Intake:
0.9 ~ 1.1 mm <Limit: 1.6mm> Exhaust: 0.9 ~ 1.1mm <Limit: 1.6mm>

************************************************************ Measurement procedure:

Apply mechanic’s blueing dye to the valve face Install the valve into the cylinder head

Press the valve through the valve guide and onto the valve seat to make a clear pattern

Measure the valve seat width. Where the valve seat and valve face make contact, blueing will have been removed

If the valve seat is too wide, too narrow, or the seat is not centred, the valve seat must be replaced

************************************************************

4. Lap

• Valve face

• Valve seat

NOTE:

After replacing the valve seat, valve and valve guide, the valve seat and valve face should be lapped

************************************************************ Lapping steps:

Apply a coarse lapping compound (a) to the valve face

CAUTION:

Дата добавления: 2014-12-23