Toyota Supra 1990 Manual page 101

Plastigage
/ '
Front Mark
ENGINE MECHANICAL - Cylinder Block EM-69
EM3831
EM3832
EM3833
(c) Using a plastic-faced hammer, tap the rod bolts lightly
and lift off the rod cap.
HINT: Keep the lower bearing inserted with the cap.
(d) Clean the bearings and crankshaft pins.
(e) Inspect each bearing for pitting and radial scratches.
If bearings are damaged, replace the bearings.
(f) Lay a strip of Plastigage across the crankshaft pin.
(g) Align the rod and cap marks and fit on the cap.
Torque the rod cap nuts.
Torque: 650 kg-cm (47 ft-Ib. 64 N ·m)
HINT: Do not turn the crankshaft.
(h) Remove the rod cap.
(i)
Measure the plastigage at its widest point.
Standard clearance:
0.021 - 0.053
mm
(0.0008 - 0.0021
in.)
Maximum clearance:
0.07
mm
(0.0028
in.)
If the clearance is greater than maximum, replace the bear-
ings and/or grind the crank pins.
Undersized bearing: U/S
0.25
(j)
Clean any Plastigage from the bearing and crankshaft
pin.