Page 419 - Foton Workshop Manual - Sauvana

ENGINE MECHANICAL - PISTON AND CONNECTING ROD 12B-129

2. Check the axial clearance of the piston
connecting rod
(a). Install the piston and connecting rod.
(b). Moving the connecting rod to one side,
and measure the axial clearance of the
piston connecting rod on the side of larger
clearance with the feeler gauge.
Standard axial clearance：0.160~0.312mm
Max axial clearance：0.35mm
• Replace the connecting rod components
if the clearance measured is larger than 12B
the limit clearance.

3. Check the oil film clearance of the
connecting rod
(a). Clean the stem and the shell of the
connecting rod to wipe off the oil film from
the connecting rod journal surface and the
internal surface of the connecting rod shell.
(b). Cut plastic clearance gauge material with
the same width of the connecting rod
shell, and place them on the journal of the
connecting rod, making it parallel with the
journal.

(c). Install the connecting rod and the
connecting rod cap carefully and fasten the
fixed bolts of the connecting rod cap.
Torque : 49N•m
(d). Remove the fixed bolts of the connecting
rod cap and remove the bearing shell
assembly of the connecting rod cap.
(e). Measure the width of the plastic oil gauge
material which is compressed with the
plastic oil gauge (width of the widest part) .
Standard value:0.020~0.051mm
• If the oil clearance is greater than the
maximum value, replace the upper and
lower bearing shell of the connecting rod
and polish or replace the crankshaft if
necessary.

Page 419