Section 03 ENGINE
Subsection 08 (CYLINDER HEAD)
VALVE GUIDE INNER DIAMETER
DESCRIPTION
INTAKE
New
5.000 - 5.012 mm
(.1968 - .1973 in)
Service limit
5.030 mm (.1980 in)
If part does not meet requirements, replace cylin-
der head.
NOTE:
Whenever a valve guide is replaced, it
must be properly reamed.
Timing Chain
Check timing chain sprocket condition. Mesh
chain in sprocket and check for excessive radial
play.
Check chain condition for wear and the condition
of the chain segments.
1
R175motr26A
3
3
2
1. Timing chain
2. Timing chain segments
3. Timing chain bending
If sprocket is worn or timing chain is excessively
worn or damaged, replace them as a set: crank-
shaft, camshaft gear and chain. Refer to
CRANK-
SHAFT AND CRANKCASE
for procedures.
Chain Tensioner
Check tensioner notches for damage.
Install spring and screw. Tensioner pusher should
go out.
Try to push in pusher. It must not go in. Other-
wise, replace it.
vmr2006-073-026_a
CYLINDER HEAD ASSEMBLY
Assembly is essentially the reverse procedure of
disassembly. However, pay attention to the fol-
lowing.
Cylinder Head
Install new valve stem seals every time valves are
removed.
When installing new valves, apply some lapping
compound to valve face and work valve on its seat
with a lapping tool. Ensure to properly clean cylin-
der head and valve when done.
vmr2006-073-029
Position
inner
spring with its tightest coils against
cylinder head.
Position painted area of
outer
spring against valve
spring retainer.
vmr2006-073
79
Содержание BOMBARDIER DS250 2006
Страница 1: ...C M Y CM MY CY CMY K 2006 2019 ...
Страница 2: ...2006 2019 Shop Manual DS 250 ...
Страница 3: ......
Страница 25: ......
Страница 29: ......
Страница 31: ......
Страница 47: ......
Страница 51: ......
Страница 56: ...Section 03 ENGINE Subsection 04 EXHAUST SYSTEM EXHAUST SYSTEM vmr2006 069 001 vmr2006 069 37 ...
Страница 59: ......
Страница 69: ...Section 03 ENGINE Subsection 06 COOLING SYSTEM WATER PUMP 12 N m 106 lbf in vmr2006 071 001_a 50 vmr2006 071 ...
Страница 70: ...Section 03 ENGINE Subsection 06 COOLING SYSTEM COOLING SYSTEM Loctite 592 vmr2006 071 002_a vmr2006 071 51 ...
Страница 109: ......
Страница 117: ...Section 03 ENGINE Subsection 10 CRANKSHAFT AND CRANKCASE vmr2006 075 001_a 1 Locking plate 2 Chain guide 98 vmr2006 075 ...
Страница 129: ......
Страница 132: ...Section 04 FUEL SYSTEM Subsection 01 CARBURETOR AND FUEL TANK CARBURETOR vmr2006 077 002_a vmr2006 077 113 ...
Страница 141: ......
Страница 147: ......
Страница 161: ......
Страница 167: ......
Страница 187: ......
Страница 227: ......
Страница 255: ......
Страница 279: ......
Страница 281: ......
Страница 284: ...C M Y CM MY CY CMY K ...