EM
−
98
−
ENGINE MECHANICAL
CYLINDER BLOCK
1996 LAND CRUISER (RM451U)
HINT:
If the location of this area cannot be judged by visual inspection,
measure the outer diameter at the location shown in the illustra-
tion.
If the outside diameter is less than minimum, replace the con-
necting rod bolt and nut as a set.
6.
INSPECT CRANKSHAFT
(a)
Inspect for circle runout.
(1)
Place the crankshaft on V
−
blocks.
(2)
Using a dial indicator, measure the circle runout at
the center journal.
Maximum circle runout: 0.06 mm (0.0024 in.)
If the circle runout is greater than maximum, replace the crank-
shaft.
(b)
Inspect the main journals and crank pins.
(1)
Using a micrometer, measure the diameter of each
main journal and crank pin.
Main journal diameter:
STD
68.982
−
69.000 mm (2.7158
−
2.7165 in.)
U/S 0.25
68.745
−
68.755 mm (2.7065
−
2.7069 in.)
Crank pin diameter:
STD
56.982
−
57.000 mm (2.2434
−
2.2441 in.)
U/S 0.25
56.745
−
56.755 mm (2.2341
−
2.2344 in.)
If the diameter is not as specified, check the oil clearance (See
page
EM
−
83
). If necessary, grind or replace the crankshaft.
(2)
Check each main journal and crank pin for taper
and out
−
of
−
round as shown.
Maximum taper and out
−
of
−
round:
0.02 mm (0.0008 in.)
If the taper and out
−
of
−
round is greater than maximum, replace
the crankshaft.
7.
IF NECESSARY, GRIND AND HONE MAIN JOURNALS
AND/OR CRANK PINS
Grind and hone the main journals and/or crank pins to the fin-
ished undersized diameter. Install new main journal and/or
crankshaft pin undersized bearings.
Brought to you by BirfMark
Brought to you by BirfMark
Version 1.00 - 12/21/2010
