MODEL JD382

CYLINDER  JD382

Type Size Maximum Taper Above Block
Wet Sleeve 4.502 .008 .004
- 4.500 - .0015

PISTON  JD382

Pin Hole Diameter Ring Groove Diameter Ring Groove Width Fit In Cylinder Bore
1st 2nd 3rd 4th 5th 1st 2nd 3rd 4th 5th
1.500 4.003 4.086 4.086 4.047 4.047 .129 .128 .128 .253 .1905 .003X1/2"Gage
1.4998 3.993 4.076 4.076 4.037 4.037 .128 .127 .127 .252 .1895 5-10 lbs

 

Diameter At Top Of Piston Diameter At Bottom Of Piston
A AA B BB C A AA B BB C
4.49595 4.49645 4.49695 4.49745 4.49795 4.4972 4.4977 4.4982 4.4987 4.4992

PISTON PIN  JD382

Pin Diameter Diameter Hole In Rod Finished Bushing Diameter

Pin Fit In Piston

Clearance In Bushing

Possible

Desired

1.500 1.6249 1.5005

Lite Push Fit With

Piston Heated To 160F

.0007 .0005
1.4998 1.6239 1.5003 .0003 -

PISTON RINGS  JD382

Type Of Ring Groove Position Width  Thickness Gap Clear Side Clear
Plain 1 .124 .225 .020 .005
Compression .123 .215 .012 .003
Taper Face 2 .124 .183 .023 .004
Compression .123 .173 .013 .002
Taper Face 3 .124 .183 .023 .004
Compression .123 .173 .013 .002
Ventilated 4 .2490 .183 .020 .0045
Oil Control .2485 .173 .010 .003
Ventilated 5 .1865 .183 .020 .0045
Oil Control .1860 .173 .010 .003

VALVE GUIDE  JD382

Outside Diameter Stem Hole Diameter Valve Seat Face To Top Of Guide Valve Stem Clearance Limits

Desired Stem Clearance

Intake

Exhaust Reamed Intake Exhaust Intake Exhaust Intake Exhaust
.752 .752 .4365 .2 9/64 1 19/64 .0021 .0037 .0015 .0025
.751 .751 .4360 - - .0008 .0008 - -

INTAKE VALVE  JD382

Stem Diameter Maximum Stem Wear Minimum Margin Face Angle Clearance Limits Desired Clearance
.4352 .002 1/32 44 .0021 .0015
.4344 - - - .0008 -

EXHAUST VALVE  JD382

Stem Diameter Maximum Stem Wear Minimum Margin Face Angle Clearance Limits Desired Clearance
.4325 .002 1/32 44 .0037 .0025
.4315 - - - .0019 -

VALVE SEAT (INTAKE)  JD382

Seat Angle Seat Width Stone Size Narrow Stone Stone Diameter
45 3/32 30 15-70 1 7/8

VALVE SEAT (EXHAUST)  JD382

Seat Angle Seat Width Stone Size Narrow Stone Stone Diameter
45 3/32 45 15-70 1 5/8

VALVE SPRING  JD382

Free Length

Valve Closed

Valve Open

Spring Length Spring Load Spring Length Spring Load
2 3/8 1 7/8 58-64 lbs 1.521 115-123 lbs.

CAMSHAFT  JD382

Bearing Journal Diameter

Tappet Hole Diameter

Tappet Diameter

Clearance Limits

End Play

Front  Center Rear
2.1225 1.7465 1.6840 1.0008 .9985 .0033 .009
2.1220 1.7460 1.6835 1.0000 .9975 .0015 .005

CAMSHAFT BEARINGS  JD382

Inside Diameter

Clearance Limits

Oil Pump Backlash

1 2 3 1 2 3
2.1260 1.750 1.6875 .004 .004 .004 .010
2.1250 1.749 1.6865 .0025 .0025 .0025 .008

CONNECTING ROD  JD382

Side Play

Bearing Journal Size

Bearing Clearance

Desired Clearance

Possible Desired
.0105 .008 2.7495 .0028 .002
.0065 - 2.7485 .0008 -

CRANKSHAFT  JD382

Thrust On Front Main Bearing

End Thrust

Bearing Journal Size

Bearing Clearance

Desired Clearance

Flywheel RunOut

.008 3.251 .0027 .0015 .008
.005 3.250 .0005 - -

 


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