Inspection Of Crankshaft; Inspect Crankshaft For Runout; Inspect Main Journals And Crank Pins; Grind And Hone Main Journals And/Or Crank Pins - Toyota 7M-GE Repair Manual

., : I. ,,
;:
.I"
..: ;.., -..*::a* .,,. I.
ENGINE MECHANICAL - Cylinder Block
EMd81
. .
EM29&
CD
_
iii,
\,
\
EM3765 EM3780
INSPECTIC)N 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 center journal.
Maximum circle runout: 0.08 mm (0.0024 in.)
If the circle runout is greater than maximum, replace the
crankshaft.
NOTE: Use a long spindle on the,,dial gauge.
2. INSPECT MAIN JOURNALS AND CRANK PINS
(a) Using a micrometer, measure the diameter of each
main journal and crank pin.
Journal diameter:
STD 59.994 - 60.012 mm
(2.3620 - 2.3627 in.1
U/S 0.25 59.730 - 59.740 mm
(2.3516 - 2.3520,in.I
Crank pin diameter:
STD size 51.976 - 52.000 mm
(2.0463 - 2.0472 in.)
U/S 0.25 51.725 - 51.735 mm
(2.0364 - 2.0368 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.1
If taper or out-of-round is greater than maximum, replace
the crankshaft.
3.
IF NECESSARY, GRIND AND HONE MAIN JOURNALS
AND/OR CRANK PINS
Grind and hone the main journals and/or crank pins to the
finished undersized diameter (See procedure step 2).
Install new main journal and/or crank pin undersized bear-
ings.