ENGINE
TNV IDI Service Manual
6-43
Cylinder Block
• Method B: Use a feeler gauge to measure the
clearance (Figure 6-56, (3)) between the
thrust bearing (Figure 6-56, (1)) and
crankshaft (Figure 6-56, (2)). Record the
measurement. See Thrust Bearing on
page 6-8 for the service limit.
Figure 6-56
4. Remove the bearing cap. Do not remove the
bearing inserts at this time.
5. Wipe oil from the bearing insert and crankshaft
journal surfaces.
6. Place a piece of PLASTIGAGE
®
(Figure 6-57, (1)) along the full width of the
bearing insert.
Figure 6-57
IMPORTANT
Do not rotate crankshaft when using
PLASTIGAGE. A false reading may result.
7. Reinstall the bearing cap and tighten to
specification. See Special Torque Chart on
page 6-13.
8. Remove the bearing cap.
Figure 6-58
9. Compare the width of the flattened
PLASTIGAGE (Figure 6-58, (1)) to the
graduation marks on the package. The mark
that most closely matches the width of the
flattened PLASTIGAGE will indicate the bearing
oil clearance. Record the measurement. See
Crankshaft on page 6-7 for clearance
specifications.
10. Repeat with the remaining main bearings.
Note: Be sure to note the markings on the main
bearing caps, or make marks so they can
be reinstalled in the same order as they
were removed. The “arrows” on the main
bearing caps point to the flywheel end of
the engine.
0001899
(1)
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