Crankshaft Main Bearing Replacement; Main Bearing Clearance Inspection - Honda S2000 Service Manual

Crankshaft Main Bearing Replacement
Main Bearing Clearance Inspection
'1.
To check main bearing-to-journal oil clearance,
remove the lower block and bearing halves. (see
p a g e 7 - 1 1 ) .
2 . C l e a n e a c h m a i n j o u r n a l a n d b e a r i n g h a l f w i t h a
c l e a n s h o p t o w e l .
3. Place one strip of plastigage across each maan
j o u r n a l .
NOTE: lf the engine is still in the vehicle when you
bolt the lower block 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
bearing at a time.
Reinstallthe bearings and lower block, then torque
the bolts to 29 N.m (3.0 kgf m, 22 lbf.ft) + 60'.
NOTE: Do not rotate the crankshaft during
insDection,
Remove the lower block and bearings again, and
measure the widest pan of the plastigage.
Main Bearing-to-Journal Oil Clearance:
Standard {New): 0.017 0.041 mm
(0.0007 0.0016 in.)
Service Limit:
0.050 mm (0.0020 in.l
4.
6. lf 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
ofthe bearing. Install a new, complete bearing with
the same color code(s), and recheck the clearance.
Do not file, shim, or scrape the bearings or the caps
to adjust clearance.
7. lf the plastigage shows the clearance is still
incorrect, try the next larger or smaller bearing (the
color listed above or below that one), and check
again. lf the proper clearance cannot be obtained
by using the appropriate larger or smaller bearings,
reolace the crankshaft and start over.
(cont'd)
7-7