LEXUS LS430 2003 Factory Repair Manual

Fig. 426: Prying Out Crankshaft Bearing Cap
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Be sure to organize the bearing caps and lower thrust washers in such a way that they can be
reinstalled exactly as before.
d. Lift out the crankshaft.
e. Remove the 2 upper thrust washers.
HINT:
Be sure to organize the removed upper thrust washers in such a way that they can be
reinstalled exactl
y as before.

Keep the upper bearings together with the cylinder block.
f. Clean each crankshaft journal and bearing.
g. Check each crankshaft journal and bearing for pitting and scratches.
If the journal or bearing is damaged, replace the bearings. If necessary, replace the crankshaft.
h. Install the 10 crankshaft bearings and 5 crankshaft bearing caps with the 30 bolts (see step 25). Do
not install the crankshaft.
Fig. 427: Installing Crankshaft Bearing Caps

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Fig. 428: Measuring Inside Diameter Of Crankshaft Bearing Using Cylinder Gauge
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
i. Using a cylinder gauge, measure the inside diameter of the crankshaft bearing.
Bearing inside diameter:
66.986 to 67.000 mm (2.6372 to 2.6378 in.)
j. Measure the diameter of the crankshaft journal (see step 16).
k. Subtract the crankshaft journal diameter measurement from the crankshaft bearing inside diameter
measurement.
STANDARD CLEARANCE:
STANDARD CLEARANCE
MAXIMUM CLEARANCE:
No. 1 and No. 50.017 to 0.033 mm (0.0007 to 0.0013 in.)
Others0.029 to 0.045 mm (0.0011 to 0.0018 in.)

MAXIMUM CLEARANCE
If the oil clearance is greater than the maximum, replace the bearings. If necessary, replace the
crankshaft.
HINT:If using a standard bearing, replace it with one that has the same number. If the number of
the bearing cannot be determined, select the correct bearing by adding together the numbers
imprinted on the cylinder block and crankshaft, then refer to the table on the next page for the
appropriate bearing number. There are 5 sizes of the standard bearings. For No. 1 and No. 5
<005300520056004c0057004c0052005100030045004800440055004c0051004a0056000f000300580056004800030045004800440055004c0051004a00560003005000440055004e0048004700030016000f00030017000f00030018000f00030019000300
44005100470003001a00110003002900520055000300520057[her position bearings, use bearings
marked 1,2,3,4 and 5.
No. 1, No. 5:
No. 1 and No. 50.043 mm (0.0017 in.)
Others0.055 mm (0.0022 in.)

Fig. 429: Identifying Crankshaft Bearings Mark

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
Fig. 430: Upper And Lower Bearing Reference Table (1 Of 2)

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
EXAMPLE:
Cylinder block "08" + Crankshaft "06" =
Total number 14 (Use bearing "4" (Upper), "5" (Lower))
Others:

Fig. 431: Upper And Lower Bearing Reference Table (2 Of 2)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
EXAMPLE:
Cylinder block "08" + Crankshaft "06" =
Total number 14 (Use bearing "2" (Upper), "3" (Lower))
Reference
CYLINDER BLOCK CRANKSHAFT JOURNAL BORE DIAMETER (A):
CYLINDER BLOCK CRANKSHAFT JOURNAL BORE DIAMETER SPECIFICATIONS
Mark 0072.000 mm (2.8346 in.)
Mark 0172.001 mm (2.8347 in.)
Mark 0272.002 mm (2.8347 in.)
Mark 0372.003 mm (2.8348 in.)
Mark 0472.004 mm (2.8348 in.)
Mark 0572.005 mm (2.8348 in.)
Mark 0672.006 mm (2.8349 in.)
Mark 0772.007 mm (2.8349 in.)
Mark 0872.008 mm (2.8350 in.)
Mark 0972.009 mm (2.8350 in.)
Mark 1072.010 mm (2.8350 in.)
Mark 1172.011 mm (2.8351 in.)

CRANKSHAFT JOURNAL DIAMETER (B):
CRANKSHAFT JOURNAL DIAMETER SPECIFICATIONS
STANDARD BEARING CENTER WALL THICKNESS: NO. 1 AND NO. 5
STANDARD BEARING CENTER WALL THICKNESS SPECIFICATIONS
OTHERS:
STANDARD BEARING CENTER WALL THICKNESS SPECIFICATIONS
l. Remove the 10 bolts, 20 nuts, 5 crankshaft bearin
g caps and 5 lower crankshaft bearings (see steps
Mark 1272.012 mm (2.8351 in.)
Mark 1372.013 mm (2.8352 in.)
Mark 1472.014 mm (2.8352 in.)
Mark 1572.015 mm (2.8352 in.)
Mark 1672.016 mm (2.8353 in.)
Mark 0067.000 mm (2.6378 in.)
Mark 0166.999 mm (2.6378 in.)
Mark 0266.998 mm (2.6377 in.)
Mark 0366.997 mm (2.6377 in.)
Mark 0466.996 mm (2.6376 in.)
Mark 0566.995 mm (2.6376 in.)
Mark 0666.994 mm (2.6376 in.)
Mark 0766.993 mm (2.6375 in.)
Mark 0866.992 mm (2.6375 in.)
Mark 0966.991 mm (2.6374 in.)
Mark 1066.990 mm (2.6374 in.)
Mark 1166.989 mm (2.6374 in.)
Mark 1266.988 mm (2.6373 in.)
Mark 3<001500110017001c00150003005700520003004f00480056005600030057004b004400510003001500110017001c00180003005000500003000b001300110013001c001b00140003005700520003004f00480056005600030057004b004400510003001300
110013001c001b00150003004c00510011000c[
Mark 4<001500110017001c00180003005700520003004f00480056005600030057004b004400510003001500110017001c001b0003005000500003000b001300110013001c001b00150003005700520003004f00480056005600030057004b004400510003001300
110013001c001b00160003004c00510011000c[
Mark 52.498 to less than 2.501 mm ar 5 (0.0983 to less than 0.0985 in.)
Mark 62.501 to less than 2.504 mm Mark 6 (0.0985 to less than 0.0986 in.)
Mark 72.504 to less than 2.507 mm ar 7 (0.0986 to less than 0.0987 in.)
Mark 12.486 to less than 2.489 mm ar (0.0979 to less than 0.0980 in.)
Mark 22.489 to less than 2.492 mm ar 2 (0.0980 to less than 0.0981 in.)
Mark 32.492 to less than 2.495 mm Mark 3 (0.0981 to less than 0.0982 in.)
Mark 42.495 to less than 2.498 mm ar (0.0982 to less than 0.0983 in.)
Mark 52.498 to less than 2.501 mm Mark 5 (0.0983 to less than 0.0985 in.)

(a) to b (c) on the previous pages).
m. Remove the 5 upper crankshaft bearings from the cylinder block.
HINT:
<0025004800030056005800550048000300570052000300520055004a00440051004c005d004800030057004b004800030045004800440055004c0051004a00030046004400530056000f00030045004800440055004c0051004a0056000300440051004700
030057004b00550058005600570003005a00440056004b0048[rs in such a way that they can be
reinstalled exactly as before.
Fig. 432: Removing Crankshaft Bearing Caps Bolts

Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
8.INSPECT CYLINDER BLOCK SUB-ASSY
a. Clean the cylinder block.Using a gasket scraper, remove all the gasket material from the top surface
of the cylinder block.
b. Using a soft brush and solvent, thoroughly clean the cylinder block.

Fig. 433: Cleaning Cylinder Block Using Gasket Scraper
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
c. Inspect for warpage.
1. Using a precision straight edge and feeler gauge, measure the surfaces contacting the cylinder
head and main bearing cap for warpage.
Maximum warpage: 0.07 mm (0.0028 in.)
If the warpa
ge is greater than the maximum, replace the cylinder block sub-assy.