DAELIM DAYSTAR -, Service Manual

Page: 81 / 214

8-2
Cylinder Head / Valve
Torque Values
Cam Chain Tensioner Pivot Bolt 1.1kgf-m(11N.m)
Spark Plug 1.1kgf-m(11N.m)-Apply engine oil
Camshaft Holder 8mm nut 2.0kgf-m(20N.m)-Apply engine oil
Cam Chain Tensioner Mounting Bolt 1.2kgf-m(12N.m)
Cam Chain Tensioner Sealing Screw 0.4kgf-m(4N.m)
Cylinder Head Cover Bolt 1.0kgf-m(10N.m)
Crank Shaft Hole Cap 0.8kgf-m(8N.m)
Timing Hole Cap 0.6kgf-m(6N.m)
Tools
Special
Dowel Pin Puller Set
Sliding Shaft
Sliding Weight
Valve Guide Reamer
Valve Guide Driver
Common
Valve Spring Compressor
Valve Seat Cutter
Seat Cutter IN 35
。
(23mm)
EX 35
。
(20mm)
IN 45
。
(24.5mm)
EX 45
。
(24.5mm)
IN 60
。
(22mm)
EX 60
。
(22mm)
Cutter Holder 5mm
Iow compression
●
Valves
- Improper valve clearance adjustment
- Broken or damaged valve spring
- Incorrect valve timing
- Faulty valve seat adherence
●
Cylinder head
- Leaking or damaged head gasket
- Warped or cracked cylinder head
●
Cylinder and piston (Refer to section 9)
Excessice smoke from muffler
●
Worn valve guide or valve stem
●
Damaged valve stem seal
●
Worn and damaged piston ring
Incorrect idle speed
●
Compression is too low
Compression is too high
●
Excessive carbon build-up on piston or
combustion chamber
Excessive noise
●
Incorrect valve clearance adjustment
●
Sticking valve or broken valve spring
●
Worn or damaged camshaft
●
Worn or damaged rocker arm and rocker arm
shaft
●
Worn or damaged cam chain
●
Worn or damaged cam chain tensioner
●
Damaged cylinder head gasket
●
Improper spark plug installation
Troubleshooting
●
Cylinder head operation problem can be diagnosed by a compression test, or by tracing noises to the
topend with a sounding rod or stethoscope.