Geely JL481Q, Manual

Page: 83 / 198

Standard radial clearance: 0.06-0.22mm. The Max radial clearance: 0.30mm
In case that the radial clearance is larger than the maximum value, replace the whole set of thrust washers. The thickness
of thrust washer: 2.5 mm.
(2) Disassemble the main bearing cap and check the oil clearance
a. Follow the procedure in the table, unscrew and take down the bolts with several operations (Fig. 190) starting from two
sides first and then in the middle.
b. Use the disassembled bolts to rock the main bearing cap with prying actions, and take down the main bearing cap, lower
bearing shell and thrust washer (Fig. 191);
c. Take out the crankshaft with lifting action (Fig.192);
d. Clean all the main bearing journals and main bearing shells;
e. Check whether all the main bearing journals and main bearing shells have dents and flaws on the surface (Fig. 193). In
case that the main bearing journal or main bearing shell are damaged, replace the bearing shell. When necessary, grind
the crankshaft.
f. Mount the crankshaft onto the cylinder block: pass the plastic clearance gauge through each journal to measure the oil
film clearance (Fig. 194).
g. Install the main bearing cap (Fig. 195) first in the middle and then two sides, and tighten evenly the bolts diagonally with
the torque of 60Nm(MR479Q,MR479QA)/70Nm(MR481QA)/80Nm(JL481Q)
Fig. 190 Detaching main bearing cap bolts
Fig. 192 Taking-out crankshaft
Fig.191 Detaching main bearing cap
Fig.193 Inspecting crankshaft
-0.03
-0.06
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