Valve Seat Refacing - Husqvarna 2011 TE 630 Workshop Manual

Valve seat refacing

Clean off any fouling deposits from the valve. Apply Prussian Blue to the valve
and rotate it in its seat using a rubber hose or other similar tool.
Remove the valve and measure the width "X" of the seating face. If width is
greater than 1.5 mm, the seat needs to be refaced.
The standard width (measured as shown) of the seating face of the valve is:
A = 0.9-1.1 mm for INTAKE
A = 0.9-1.0 mm for EXHAUST
Valves cannot be ground and must be replaced if damaged.
Part. N. 8000 H2051 (02-2010)
ENGINE OVERHAUL
B
INTAKE
C
B
EXHAUST
C
36,60÷36,65 mm
1,441÷1,443 in.
33 mm
1,299 in.
30,60÷30,65
1,205÷1,207 in.
27,5 mm
1,083 in.
G.3