ALL  I.D. Intake Valve Guide Hole .5913
in Cylinder Head .5923

528 ALL  Exhaust Valve Stem and Valve .0037L Guide .0050L
ALL O.D. Exhaust Valve Stem .4957
4965 .4937

Service allowable limits of .4937 is applicable only to inconel or nimonic valves.
527 ALL  Finished I.D. Exhaust .4995 Valve Guide .5005
: 1/2 inch diameter exhaust valves may have exhaust valve guides that  are .003 inch over the maximum inside
:  diameter limit, anytime up to 300 hours of service. After 300 hours of service, inside diameter of exhaust valveguide may increase .001 inch during each 100 hours of operation up to the recommended overhaul time for the engine, or not to exceed .015 inch over the basic I.D. See latest edition of Service Instruction No. 1009 for
3.1
recommended overhaul time.
PART III GEARED ENGINES
SECTION II CYLINDERS
Ref. New
617 618 619
620
621 622
623 625
Ref.
Old

529
951 952 61l
531
532 612
ALL ALL ALL ALL ALL ALL ALL ALL ALL ALL ALL ALL ALL
533 ALL 971 ALL
Chart Nomenclature
Intake Valve Stem and
Valve Guide
O.D. Intake Valve Stem
Finished I.D. Intake Valve
Guide
Valve and Valve Cap
Clearance
Dry Tappet Clearance
Valve Rocker Shaft and
Valve Rocker Bushing
Finished I.D. of Valve Rocker
Shaft (Bushing) in Cylinder Head
Valve Rocker Shaft and Valve
Rocker Bushing
O.D. Valve Rocker Shaft
Finished I.D. of Rocker
Arm Bushing
Valve Rocker Bushing and
Valve Rocker
Valve Rocker Shaft Bushing and Cylinder Head
Valve Rocker Shaft Bushing Hole in Cylinder Head
Valve Rocker and Cylinder Head -Side Clearance
Intake and Exhaust Valve
Guide Height
MEASURE VALVE GUIDE HEIGHT FROM THE VALVE SPRING SEAT
COUNTERBORE IN THE CYLINDER HEAD TO THE TOP OF VALVE
GUIDE.
Dimensions Clearances
Mfr. Mfr.
Min. Serv. Min. Serv.

& Max. & Max.
Max. Max.

.0010L .0028L .006L
.4022
.4030 .4010

.4040
.4050

.000 .004L .005L
.028 .080
.0001L .0013L .0025L
.6246
.6261 .6270

.0007L .0017L .004L
.6241 .6245 .6231
.6252 .6263 .6270
Bushing Must Be Burnished In Place
.0022T .0038T (A)
.7380 .7388
.002L .020L .024L
.914 .954
SSP1776 3-11
SERVICE TABLE OF LIMITS
PART III GEARED ENGINES SECTION II CYLINDERS
Cylinder, Piston, Connecting Rod and Valve Components
SERVICE TABLE OF LIMITS PART III GEARED ENGINES SECTION III GEAR TRAIN SECTION -OIL & SCAVENGE PUMP
Ref.  Ref.  Chart  Nomenclature  Dimensions  Clearances 
Mfr.  Mfr. 
New  Old  Min.  Serv.  Min.  Serv. 
　
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