Lexus RX300 (MCU15). Manual — part 453
P12734
No. 1
Number Mark
No. 2
No. 3
No. 4
No. 1
No. 2 No. 3
No. 4
Number Mark
Number
Mark
No. 1 and No. 4 journal bearings
EXAMPLE:
Cylinder block ”06” (A)
= Total number 14 (Use bearing ”5”)
+ Crankshaft ”08” (B)
Cylinder block (A)
Crankshaft (B) =
+
Use Bearing
Total number
” ”: Number Mark
0 – 5
6 – 11
12 – 17 18 – 23 24 – 28
”3”
”4”
”5”
”6”
”7”
V08071
No. 1 and No. 4 journal standard bearings selection chart
Crankshaft
number mark
Cylinder block number mark
EXAMPLE:
Cylinder block ”06”, Crankshaft ”08”
= Use bearing ”5”
EM–96
–
ENGINE MECHANICAL
CYLINDER BLOCK
LEXUS RX300 (RM785E)
HINT:
If using a bearing, replace it with one having 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 below
for the appropriate bearing number. The No. 1 and No. 4 journal
bearings have 5 standard bearing sizes, marked ”3”, ”4”, ”5”, ”6”
and ”7” accordingly. The No. 2 and No. 3 journal bearings have
5 standard bearing sizes, marked ”1”, ”2”, ”3”, ”4” and ”5” ac-
cordingly.
No. 2 and No. 3 journal bearings
EXAMPLE:
Cylinder block ”06” (A)
= Total number 14 (Use bearing ”3”)
+ Crankshaft ”08” (B)
Cylinder block (A)
Crankshaft (B) =
+
Use Bearing
Total number
” ”: Number Mark
0 – 5
6 – 11
12 – 17 18 – 23 24 – 28
”1”
”2”
”3”
”4”
”5”
V08070
No. 2 and No. 3 journal standard bearings selection chart
Crankshaft
number mark
Cylinder block number mark
EXAMPLE:
Cylinder block ”06”, Crankshaft ”08”
= Use bearing ”3”
–
ENGINE MECHANICAL
CYLINDER BLOCK
EM–97
LEXUS RX300 (RM785E)
EM–98
–
ENGINE MECHANICAL
CYLINDER BLOCK
LEXUS RX300 (RM785E)
Reference:
Item
Mark
mm (in.)
Cylinder block main journal bore diameter
(A)
”00”
”01”
”02”
”03”
”04”
”05”
”06”
”07”
”08”
”09”
”10”
”11”
”12”
”13”
”14”
”15”
”16”
66.000 (2.5984)
66.001 (2.5985)
66.002 (2.5985)
66.003 (2.5985)
66.004 (2.5986)
66.005 (2.5986)
66.006 (2.5987)
66.007 (2.5987)
66.008 (2.5987)
66.009 (2.5988)
66.010 (2.5988)
66.011 (2.5989)
66.012 (2.5989)
66.013 (2.5989)
66.014 (2.5990)
66.015 (2.5990)
66.016 (2.5990)
Crankshaft main journal diameter (B)
”00”
”01”
”02”
”03”
”04”
”05”
”06”
”07”
”08”
”09”
”10”
”11”
”12”
61.000 (2.4016)
60.999 (2.4015)
60.998 (2.4015)
60.997 (2.4015)
60.996 (2.4014)
60.995 (2.4014)
60.994 (2.4013)
60.993 (2.4012)
60.992 (2.4012)
60.991 (2.4012)
60.990 (2.4012)
60.989 (2.4011)
60.988 (2.4011)
Standard bearing center wall thickness
”1”
”2”
”3”
”4”
”5”
”6”
”7”
2.486 – 2.489 (0.0979 – 0.0980)
2.489 – 2.492 (0.0980 – 0.0981)
2.492 – 2.495 (0.0981 – 0.0982)
2.495 – 2.498 (0.0982 – 0.0983)
2.498 – 2.501 (0.0983 – 0.0985)
2.501 – 2.504 (0.0985 – 0.0986)
2.504 – 2.507 (0.0986 – 0.0987)
(l)
Completely remove the Plastigage.
28.
REMOVE CRANKSHAFT
(a)
Lift out the crankshaft.
(b)
Remove the 4 upper main bearings and 2 upper thrust
washers from the cylinder block.
HINT:
Arrange the main bearing caps, bearings and thrust washers in
the correct order.
P12404
P12405
P12403
P12416
60
°C
P12415
–
ENGINE MECHANICAL
CYLINDER BLOCK
EM–99
LEXUS RX300 (RM785E)
29.
CHECK FIT BETWEEN PISTON AND PISTON PIN
Try to move the piston back and forth on the piston pin.
If any movement is felt, replace the piston and pin as a set.
30.
REMOVE PISTON RINGS
(a)
Using a piston ring expander, remove the 2 compression
rings.
(b)
Remove the 2 side rails and oil ring by hand.
HINT:
Arrange the piston rings in the correct order only.
31.
DISCONNECT CONNECTING ROD FROM PISTON
(a)
Using a small screwdriver, pry out the 2 snap rings.
(b)
Gradually heat the piston to approx. 60
°C (140°F).
(c)
Using a plastic–faced hammer and brass bar, lightly tap
out the piston pin and remove the connecting rod.
HINT:
S
The piston and pin are a matched set.
S
Arrange the pistons, pins, rings, connecting rods and
bearings in the correct order.
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