Main Bearings; Clearance - Honda CR-V 1997 Service Manual

Main Bearings
Clearance
1. To check main bearing-ta-journal oil clearance,
remove the main caps and bearing halves.
2. Clean each main journal and bearing half with a
clean shop towel.
3. Place a strip of plastigage across each main journal.
NOTE: If the engine is still in the vehicle when you
bolt the main cap down to check clearance, the
weight of the crankshaft and flywheel will flatten
the plastigage further than just the torque on the
cap bolt, and give you an incorrect reading. For an
accurate reading, support the crank with a jack
under the counterweights and check only one bear-
ing at a time.
4. Reinstall the bearings and caps, then torque the
bolts.
1st step: 25 N'm (2.5 kgf·m, 181bHt)
Final step: 76 N'm (7.8 kgf·m, 56 IbHt)
NOTE: Do not rotate the crankshaft during inspec-
tion.
5. Remove the bearing cap again, and measure the
widest part of the plastigage.
Main Bearing-to-Journal Oil Clearance:
Standard (New):
No.1, 2, 4, 5 Journals:
0.024 - 0.042 mm (0.0009 - 0.0017 in)
No.3 Journal:
0.030 - 0.048 mm (0.0012 - 0.0019 in)
Service Limit: 0.06 mm (0.002 in)
PLASnGAGE
6. If the plastigage measures too wide or too narrow,
(remove the engine if it's still in the vehicle),
remove the crankshaft, and remove the upper half
of the bearing. Install a new, complete bearing with
the same color code (select the color as shown on
the next page), and recheck the clearance. Do not
file, shim, or scrape the bearings or the caps to
adjust the clearance.
7. If the plastigage shows the clearance is still incor-
rect, try the next larger or smaller bearing (the color
listed above or below that one), and check again. If
the proper clearance cannot be obtained by using
the appropriate larger or smaller bearings, replace
the crankshaft and start over.
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