Chery QQ - Repair of Valve Seat Insert; Assembly of Cylinder Head

Chery QQ Service Manual Mechanical Part of SQR 472Engine
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3.3.4.2 Repair of valve seat insert
Notice: The repair of valve seat is always conducted in
the course of the inspection of valve’s fitting position. The
surface repaired should be free from any breakage. Take it
out slowly after the inspection.
3.3.4.3 45wimble surface is assorted standard value.
3.3.4.4 Inspect the fitting position of the valve. The best
position is the center of the valve. If no the valve should be
adjusted.
3.3.4.5 Cut wimble surface at the center of assorted
position with inner 70and outer 30
3.3.4.6 Prepare for polishing of valve seal.
3.4 Assembly of cylinder head
3.4.1 Cylinder head
Pay attention to the following for installing the other
auxiliary part of cylinder head:
3.4.2 Protective tube of spark plug
1. Press the protective tube of spark plug into the
protective tube hole on the cylinder head with the special
auxiliary tool. Before pressing, spread the protective tube
with sealant. The pressing depth is indicated in the right
figure.
Notice: Pay attention to the pressing depth and the
uprightness to top of cylinder head when pressing.
During pressing, the protective tube can not be deformed,
or leaking will be occurred at the cylinder head cover.
Protective Tube of Spark Plug