Onan B43E series User Manual

Dimensions and Clearances
All clearances given at room temperature of 70°F. (21 "C). All dimensions in inches (approximate millimetre dimensions
in parentheses) unless otherwise specified.
a
DESCRIPTION . MINIMUM
Inches
CYLINDER BLOCK
Cylinder Bore Honed Diameter
...................................
Maximum Allowable
3.2490
Taper .........................................................
Out-of-Round .................................................
Main Bearing Inside Diameter (Without bearing) ...................
Main Bearing Inside Diameter (Installed) ..........................
Camshaft Bearing Bore (Bearing installed) ........................
2.187
2.0015
1.3760
CRANKSHAFT
Main Bearing Journal Diameter..
.................................
Main Bearing Clearance.. ........................................ 0.0025
Connecting Rod Journal Diameter.. ..............................
Crankshaft End Play.. ........................................... 0.006
1.9992
1.6252
CONNECTING ROD
Large Bore Diameter (Rod bolts properly torqued) .................
Bearing to Crankshaft Clearance
1.6280
0.0020
0.6879
Aluminum Rod ................................................ 0.0020
Connecting Rod Side Clearance.. ................................
Piston Pin Bushing Bore (Finished bore) ..........................
CAMSHAFT
Bearing Journal Diameter..
...................................... 1.3740
Bearing Clearance.. ............................................. 0.0015
End Play. ....................................................... 0.0030
Camshaft Lift
B43G, 8486 ...................................................
B43E .........................................................
PISTON
Clearance in Cylinder
Piston Pin Bore..
................................................ 0.68774
Ring Groove Width
Measure
90" to pin 1.187 inch below top of piston ...............
Top 1 Compression Ring.. .....................................
0.0033
0.080
(mm)
(82.53)
(55.55)
(50.84)
(34.95)
(50.78)
(0.064)
(41.28)
(0.15)
(41.35)
(0.051)
(17.47)
(0.051)
(34.90)
(0.038)
(0.076)
0.300
0.258
(0.084)
(1 7.47)
(2.032)
(2.0321
MAXIMUM
Inches
3.2500
0.005
0.003
2.188
2.0040
1.3770
2.0000
0.0038
1.6260
0.01 2
1.6285
0.01 60
0.6882
0.0033
1.3745
0.0030
(7.62)
(6.55)
0.0053
0.68814
0.081
0.081
(mm)
(82.55)
(0.1 3)
(0.08)
(55.58)
(50.90)
(34.98)
(50.80)
(0.097)
(41.30)
(0.30)
(41 -36)
(0.406)
(1 7.48)
(0.084)
(34.91
)
(0.076
(0.135)
(17.48)
(2.057)
12.057)
-
No. 2 Compression Ring. ......................................
No. 3 Oil Control Ring ......................................... 0.188 i4.775j 0.189 i4.801 j
0.080
3- 1
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Onan B43E series Specifications

General

Brand	Onan
Model	B43E series
Category	Engine
Language	English