ENGINE
5. Measure diameter of valve stem with a micrometer in
three places and in two different directions (six
measurements total). Replace if excessive wear is
evident.
Valve Stem OD LIMIT:
Intake Valve Limit: 4.975mm
Exhaust Valve Limit: 4.955mm
VALVE SEAT RECONDITIONING
Valve Seat Inspection
Inspect valve seat in cylinder head for pitting, burnt spots,
roughness, and uneven surface. If any of the above
conditions exist, the valve seat must be reconditioned.
If
the valve seat is cracked the cylinder head must be
replaced.
6. Measure valve guide inside diameter at the top middle
and end of the guide using a small hole gauge and a
micrometer. Measure in two directions, front to back and
side to side.
7. Subtract valve stem measurement to obtain stem to
guide clearance.
NOTE:
Be sure to measure each guide and valve
combination individually.
8. Replace valve and/or guide if clearance is excessive.
NOTE:
If valve guides are replaced, valve seats must be
reconditioned. Refer to Valve Seat Reconditioning for
procedure.
Cylinder Head Reconditioning
NOTE:
Servicing the valve guides and valve seats
requires special tools and a thorough knowledge of
reconditioning techniques. Follow the instructions
provided in the Valve Seat Reconditioning Kit.
Wear eye protection when performing cylinder head
service. Valve guide replacement will require heating of
the cylinder head. Wear gloves to prevent burns.
Follow the manufacturers instructions provided with the
valve seat cutters in the Valve Seat Reconditioning Kit.
Abrasive stone seat reconditioning equipment can also
be used. Keep valves in order with their respective seat.
NOTE:
Valve seat width and point of contact on the
valve face is very important for proper sealing. The
valve must contact the valve seat over the entire
circumference of the seat, and the seat must be the
proper width all the way around. If the seat is uneven,
compression leakage will result. If the seat is too wide,
seat pressure is reduced, causing carbon accumulation
and possible compression loss. If the seat is too narrow,
heat transfer from valve to seat is reduced and the valve
may overheat and warp, resulting in burnt valves.
4.15
Summary of Contents for 2007 GOES 300 S
Page 9: ...GENERAL INFORMATION Vehicle Component Inspection Location 1 6 ...
Page 39: ...CVT SYSTEM CVT EXPLODED VIEW 3 4 ...
Page 51: ...ENGINE ENGINE EXPLODED VIEW 4 3 ...
Page 52: ...ENGINE 4 4 ...
Page 53: ...ENGINE OIL FLOW DIAGRAM 4 5 ...
Page 115: ...FUEL CARBURATOR Fuel tank location 6 17 ...
Page 125: ...BODY SUSPENSION STEERING 7 6 ...
Page 133: ...BODY SUSPENSION STEERING 7 14 ...
Page 142: ...BRAKES FRONT BRAKE EXPLODED VIEW 8 6 ...
Page 188: ...ELECTRICAL 9 32 ...