Hisun HS400 Service Manual page 100

Inspection
Valve covers
• Exhaust Valve cover (1)
• Intake Valve cover (2)
Look for cracks or damage. Lubricate with
grease and replace the o-rings (3).
Cylinder Head
• Eliminate carbon deposits from the
combustion chamber using a
rounded scraper.
Note:
Do not use a sharp instrument to avoid
damaging or scratching:
• spark plug threads
• valve seats
Look for scratches or damage, if
necessary replace the cylinder head and
the cylinder head cover as a set.
Engine
Look at the cylinder head water jacket for
mineral deposits or rust. Clean if
necessary.
Installation
1. Install a new Cylinder Head Gasket.
2. Install the Cylinder Head
3. Install bolts M9 in positions 1-6 in
order and torque in two stages to 38
Nm or 28 ft lbs.
4. Install bolts M6 and torque to 10
Nm or 7 ft lbs
5. Install the timing chain guide
(exhaust side)
6. Install the timing chain tensioner
• Lightly press the timing chain
• While pressing the timing
• With the screwdriver still
4-7
tensioner rod into the timing
chain tensioner housing by
hand
.
chain tensioner rod, wind it
clockwise with a thin
screwdriver (1) until it stops.
inserted into the timing chain
tensioner, install the timing
chain tensioner and gasket
onto the cylinder block.
Then, tighten the timing
chain tensioner bolts to the
specified torque.