LEXUS LS430 2003 Factory Repair Manual

Fig. 463: Checking Piston Pin
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21.INSTALL W/PIN PISTON SUB-ASSY
a. Using a small screwdriver, install a new snap ring on one side of the piston pin hole.

Fig. 464: Installing Snap Ring Using Small Screwdriver
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b.Gradually heat the piston to about 60°C (140°F).

Fig. 465: Heating Piston
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c. Coat the piston pin with engine oil.
d. The piston's front mark and the connecting rod's outside mark should face the same direction, as
shown in the illustration.
e. Align the piston pin holes of the piston and connecting rod, and push in the piston pin with your
thumb.

Fig. 466: Aligning Piston Pin Holes
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f. Check the fit between the piston and piston pin.
1. Try to move the piston back and forth on the piston pin.
Fig. 467: Fitting Between Piston And Piston Pin

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g.Using a small screwdriver, install a new snap ring on the other side of the piston pin hole.

Fig. 468: Installing Snap Ring Using Small Screwdriver
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h. Install the oil ring expander and 2 side rails by hand.
i. Using a piston ring expander, install the 2 compression rings with the code mark facing upward.
CODE MARK:
CODE MARK REFERENCE
No. 11R
No. 22R

Fig. 469: Installing Compression Rings Using Piston Ring Expander
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j. Position the piston rings so that the ring ends are as shown in the illustration.

Fig. 470: Identifying Piston Rings Position

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22.INSTALL CONNECTING ROD BEARING
a. Align the bearing claw with the groove of the connecting rod or connecting cap.
b. Install the bearings in the connecting rod and connecting rod cap.
Fig. 471: Installing Connecting Rod Bearing

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23.INSTALL CRANKSHAFT BEARING
HINT:
<00300044004c005100030045004800440055004c0051004a0056000300460052005000480003004c00510003005a004c00470057004b005600030052004900030014001c001100180003005000500003000b00130011001a0019001b0003004c0051001100
0c000300440051004700030015001500110018000300500050[ (0.886 in.). Install the 22.5 mm
(0.886 in.) bearings in the No. 1 and No. 5 cylinder block journal positions with the crankshaft
<0045004800440055004c0051004a000300460044005300110003002c0051005600570044004f004f00030057004b004800030014001c001100180003005000500003000b00130011001a0019001b0003004c00510011000c00030045004800440055004c00
51004a00560003004c005100030057004b0048000300520057[her positions.
Upper bearings have an oil groove and oil holes; lower bearings do not.

Fig. 472: Identifying Upper Bearings And Lower Bearings Oil Groove
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a. Align the bearing claw with the claw groove of the cylinder block, and push in the 5 upper
bearings.