Page 421 - Foton Workshop Manual - Sauvana

ENGINE MECHANICAL - PISTON AND CONNECTING ROD 12B-131

(d). Check the internal diameter of the bush at
the small end of connection rod.
(e). The diameter of the bush at the small end
of connection rod - the excircle diameter of
the piston pin = the oil clearance between
the piston pin and the bush at the small
end of connection rod.
• If the oil clearance is greater than the
maximum value, replace the bush of the
connection rod or the piston pin.

12B

7. Check the clearance between the piston
ring and the piston ring groove
(a). Measure the clearance between the piston
ring and the wall of the piston ring with the
feeler gauge.
•If the clearance is larger than the
maximum value, replace the piston.
The the clearance of the piston ring groove:
The first circular groove:0.04~0.085mm
The second circular
groove:0.03~0.07mm
Oil ring:0.03~0.13mm

8. Check the end gap of the piston ring
(a). Embed the piston ring in the cylinder hole.
(b). As shown in the figure, push the piston ring
into the cylinder hole by using the piston.

Page 421