Geely JL481Q, Manual

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1. Clean piston-top surface and cylinder block
(1) Rotate the crankshaft, enable each piston to rise to the TDC, check carbon deposit on piston top-surface, whether
residue gasket material on surface of cylinder block has been cleaned up.
(2) When using compressed air to purge carbon deposit and engine oil in bolt hole, be careful enough so as not to harm
your eyes when using high pressure air.
2. Clean cylinder head
(1) Remove gasket material
Use gasket scraper to eliminate all residual gasket material on contact surface of cylinder head. Pay attention not to scrape
contact surface of cylinder head (Fig. 75).
(2) Clean combustion chamber
Use wire brush to remove all carbon deposits in combustion chamber (Fig. 76). Pay attention not to scrape lower contact
surface of cylinder head and cylinder block.
II. Inspection
Fig. 72 Remove Valve Tappet
Fig.73 Use long nose pliers to remove oil seal
Fig. 74 Use compressed air and magnet bar to
remove valve spring seat
head when engine is warmed up, that is to say, detach it when
the engine is in cold state.
2. Remove valve tappet
When removing valve tappet (Fig. 72), use a marker to write
down sequence number, arrange valve tappet according to the
sequence.
3. Remove valve
(1) Use special repair tool to compress valve spring and remove
two keepers.
(2) Remove spring retainer, valve spring and valve. Place all
removed components according to sequence.
(3) Use long nose pliers to take out oil seal (Fig. 73).
(4) Use compressed air and magnet bar, puff and take off valve
spring seat (Fig. 74).
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