Mitsubishi Fuso CANTER FE85DE6SLGP, Руководство по ремонту

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• Strike the valve several times against the valve seat while rotat-
ing the valve a little at a time.
• Wash away the compound with diesel fuel.
• Apply engine oil to the valve contact surface of the valve seat
and rub in the valve and seat well.
• Inspect the contact pattern of the valve and valve seat again.
• If the contact pattern is still defective, replace the valve seat.
Inspection: Valve seats
• If a valve is corrected or replaced with a new one as a result of
the following inspection, make sure to lap the valve seat and
valve.
(1) Valve seat width
•
If the measurement exceeds the limit, reface or replace the
valve seat.
(2) Valve sinkage from cylinder head bottom surface
•
Measure the sinkage with the valve seat in intimate contact.
• If the measurement exceeds the limit, adjust or replace the de-
fective part(s).
Refacing the valve seat
•
Grind the valve seat using a valve seat cutter or valve seat
grinder.
• After grinding, place a piece of sandpaper approximately #400
between the cutter and valve seat and grind the valve seat light-
ly.
• Use a 15
°
or 75
°
cutter to cut the valve seat to a width within the
standard range. If the valve seat cannot be refaced, replace the
valve seat.
CAUTION
• Make sure that the valve seat refacing does not cause the
valve sinkage to exceed the specified limit.
• After refacing, lap the valve and valve seat.