Toyota Land Cruiser 1988 Repair Manual page 95

EM-64 ENGINE MECHANICAL- Cylinder Block
EM0315
INSPECTION AND REPAIR OF
CRANKSHAFT
1. INSPECT CRANKSHAFT FOR RUNOUT
(a) Place the crankshaft on V-blocks.
(b) Using a dial indicator, measure the circle runout at
the No.2 and No.3 journals.
Maximum circle runout: 0.12 mm (0.0048 in.)
If the circle runout is greater than maximum, replace the
crankshaft.
2. INSPECT MAIN JOURNALS AND CRANK PINS
(a) Using a micrometer, measure the diameter of each
main journal and crank pin.
Main journal diameter (from front side):
STD size No.1 66.972-66.996 mm
(2.6367- 2.6376 in.)
No.2 68.472 - 68.496 mm
(2.6957- 2.6967 in.)
No.3 69.972 - 69.996 mm
(2.7548- 2.7557 in.)
No.4 71.472 - 71.496 mm
(2.8139- 2.8148 in.)
U/S 0.25 No.1 66.745- 66.755 mm
(2.6278- 2.6281 in.)
No.2 68.245- 68.255 mm
(2.6868- 2.6872 in.)
No.3 69.745- 69.755 mm
(2.7459- 2.7463 in.)
No.4 71.245 - 71.255 mm
(2.8049- 2.8053 in.)
U/S 0.50 No.1 66.495-66.505 mm
(2.6179- 2.6183 in.)
No.2 67.995-68.005 mm
(2.6770- 2.6774 in.)
No.3 69.495- 69.505 mm
(2.7360- 2.7364 in.)
No.4 70.995- 71.005 mm
(2.7951 - 2.7955 in.)
Crank pin diameter:
STD size 52.988 - 53.000 mm
(2.0861 - 2.0866 in.)
U/S 0.25 52.701-52.711 mm
(2.0748- 2.0752 in.)
U/S 0.50 52.451 - 52.461 mm
(2.0650- 2.0654 in.)
If the diameter is not within specification, check the oil
clearance. If necessary, grind or replace the crankshaft.
(b) 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 taper or out-of-round is greater than maximum, replace
the crankshaft.