User Manual

18
NOTE: 
5. Cam, Lifters and Tappet Blocks (All)
NOTES:
   




 



                    

and later.
 

To do this, perform following steps:
A. Starting at gasket surface end of oil feed passageway in tappet block base, thread 8-32 tap into oil passage hole. Turn tap until tap end just
starts to enter cam follower hole.
B. Screw 8-32 x ⁄" allenhead set screw in passageway until it stops.
C. Perform steps A and B to other tappet block.
NOTE:
Restricted oil ow to hydraulic lifter assemblies causes lifters to operate with improper oil pressure which may damage them or other
valve train components.
6. Piston to Valve Clearancing (All)
NOTES:
      
checked.
 

Check piston to valve clearance in following manner:
A. Assemble engine with exception of cylinder heads.
B. Turn engine over until piston in front cylinder is at top dead center. Paint area around valve pockets on pistons with machinist’s blue.
C. Place valves in cylinder head leaving o springs and retainers. Place head on cylinder and secure with one bolt.
D. Lower valves until they contact piston. Rotate valve marking painted area.
E. Remove head and check points of contact. Valve should t in recessed area machined in piston dome.
NOTE: S&S RECOMMENDS AT LEAST .060" CLEARANCE AROUND PERIPHERY OF VALVE.
F. If insucient clearance exists, remove piston and grind valve pocket until head of valve ts ush with proper clearance.
G. Repeat procedure for other cylinder head.
H. Spread layer of putty into valve pockets in both pistons.
I. Assemble cylinder heads and bolt assemblies on cylinders with head gaskets in place. Install pushrods and adjust to simulate nal
assembly.
J. Turn engine over in normal direction of travel two complete revolutions.
K. Disassemble engine and check thickness of putty in valve pockets.
NOTE: S&S RECOMMENDS AT LEAST .060" CLEARANCE BETWEEN VALVE AND PISTON VALVE POCKET RECESS. WHILE .060" CLEARANCE IS
RECOMMENDED MINIMUM, IT IS ADVISABLE TO HAVE .080" AND UP, IF POSSIBLE.
CAUTION