Chevrolet 1988 Light Duty Truck Repair Manual page 351

Figure 3 9 — Placing the Gaging Plastic on the
Connecting Rod Journal
sively out-of-round, interference between the
bearing and the crankpin will result in rapid
bearing failure.
C onnecting rod cap with the lower connecting rod
bearing insert. DO NOT TURN THE C RANKSHAFT
WITH THE GAGING PLASTIC INSTALLED.
C onnecting rod cap nuts.
T ig h te n
$
Nuts to " S pecifications." Refer to the proper
section.
Im p o rta n t
The gaging plastic will be found sticking either to
the journal or lower connecting rod bearing insert.
Do not remove it at this time.
GENERAL ENGINE MECHANICAL 6A-21
A. M easure W id e s t P o in t o f G a gin g
P la s tic w ith G rad ua te d Scale
Figure 4 0 — Measuring the Gaging Plastic
M easu re (F ig u re 40)
Gaging plastic at its w idest point, using the scale at
the gaging plastic envelope (figure 40).
If the clearance exceeds specifictions, select a new,
correct size, connecting rod bearing and remeasure
the clearance.
A standard or undersize bearing may produce the
proper clearance. Refer to the proper section for
bearing availability.
Do not attem pt to use shim s or file the bearing to
obtain the needed clearance.
If clearance cannot be brought to within specifica­
tions, recondition or replace the crankshaft. (Do not
0 recondition a rolled fillet crankshaft, such as used
on 2.5 L, 2.8 L, and 6.2 L engines.)
R em o ve or D isco n n ec t
Gaging plastic.
B-04997