MODEL H260

CYLINDER H260

Type Size Maximum Taper Above Block
Wet Sleeve 3.877 .008 .004
- 3.875 - .0015

PISTON H260

Pin Hole Diameter Ring Groove Diameter Ring Groove Width Fit In Cylinder Bore
1st 2nd 3rd 4th 1st 2nd 3rd 4th
1.2500 3.497 3.497 3.497 3.457 .129 .128 .128 .253 .003X1/2"Gage
1.2498 3.487 3.487 3.487 3.447 .128 .127 .127 .252 5-10 lbs.

 

Diameter At Top Of Piston Diameter At Bottom Of Piston
A AA B BB C A AA B BB C
3.87105 3.87155 3.87205 3.87255 3.87305 3.8723 3.8728 3.8733 3.8738 3.8743

PISTON PIN H260

Pin Diameter Diameter Hole In Rod Finished Bushing Diameter

Pin Fit In Piston

Clearance In Bushing

Possible

Desired

1.2500 1.3753 1.2504

Lite Push Fit With

Piston Heated To 160F

.0002 .0004
1.2498 1.3743 1.2502 .0006 -

PISTON RINGS H260

Type Of Ring Groove Position Width  Thickness Gap Clear Side Clear
Plain 1 .124 .167 .017 .006
Compression .123 .157 .009 .004
Taper Face 2 .124 .167 .017 .005
Compression .123 .157 .009 .003
Taper Face 3 .124 .167 .017 .005
Compression .123 .157 .009 .003
Ventilated 4 .249 .167 .017 .0045
Oil .2485 .157 .009 .003

VALVE GUIDE H260

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 1 9/32 1 9/32 .0021 .005 .0015 .004
.751 .751 .4360 - - .0008 .0035 - -

INTAKE VALVE H260

Stem Diameter Maximum Stem Wear Minimum Margin Face Angle Clearance Limits Desired Clearance
.4352 .002 1/32 30 .0021 .0015
.4344 - - - .0008 -

EXHAUST VALVE H260

Stem Diameter Maximum Stem Wear Minimum Margin Face Angle Clearance Limits Desired Clearance
.4325 .002 1/32 44 .005 .004
.4315 - - - .0035 -

VALVE SEAT (INTAKE) H260

Seat Angle Seat Width Stone Size Narrow Stone Stone Diameter
30 3/32 30 15-70 1 3/4

VALVE SEAT (EXHAUST) H260

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

VALVE SPRING H260

Free Length

Valve Closed

Valve Open

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

CAMSHAFT H260

Bearing Journal Diameter

Tappet Hole Diameter

Tappet Diameter

Clearance Limits

End Play

Front  Center Rear
1.9965 1.7465 1.684 1.0005 .9985 .003 .009
1.9960 1.7460 1.6835 1.0000 .9975 .0015 .005

CAMSHAFT BEARINGS H260

Inside Diameter

Clearance Limits

Oil Pump Backlash

1 2 3 1 2 3
2.000 1.750 1.6875 .0004 .004 .004 .010
1.999 1.749 1.6865 .0025 .0025 .0025 .008

CONNECTING ROD H260

Side Play

Bearing Journal Size

Bearing Clearance

Desired Clearance

Possible Desired
.006 .008 2.500 .0025 .0015
.010 - - .0005 -

CRANKSHAFT H260

Thrust On Front Main Bearing

End Thrust

Bearing Journal Size

Bearing Clearance

Desired Clearance

Flywheel RunOut

.008 2.874 .0027 .0015 .008
.005 2.873 .0005 - -

 


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