S&S Cycle Sidewinder 3 5/8 Big Bore Cylinders for 1936–1999 Big Twins - Manual (Page 20)

20
To avoid parts damage and obtain accurate torque readings, clean head bolt threads thoroughly before installation. For knucklehead,
panhead, or shovelhead engines, head bolt threads and area of bolt head that contacts washer (if applicable) or cylinder must then
be lubricated with Permatex® Anti-Seize Lubricant or similar anti-seize compound. S&S® has received reports of thread damage in
these engines associated with use of engine oil to lubricate head bolts. Use of clean engine oil is preferable for headbolts in Harley-
Davidson® Evolution® engines only.
A. Thoroughly clean all top end parts. Blow dry with compressed air. Use high grade lacquer thinner on gasket surfaces.
B. Insert head bolts with washers in place in cylinders and hold in place with rubber band.
NOTE: Certain head bolts will not go through cylinder flange after cylinder is bolted in place. Be sure chamfered sides of washers are located towards
head side of bolts.
Incorrect placement of chamfered side of S&S head bolt washers may cause washer to crack and break resulting in head bolts coming
loose.
C. Position base gaskets on cases.
D. Install pistons and rings per piston instructions.
E. Coat piston skirts with engine oil and install cylinders onto pistons so crankcase studs protrude through cylinder base holes 1⁄8”.
F. Put Loctite® on threads of special base nuts provided.
NOTE: All four nuts must be worked on simultaneously since there is very little clearance between nuts and cylinders nuts have been designed so that
cylinder wall behind nut is as thick as possible. (Even with 35⁄8" bore, wall behind nut is 25% heavier than stock cylinders). Do not tighten nuts.
G. Remove rubberbands and install head gaskets and cylinder heads. Some head bolts will fall out. Make sure washers are on correctly if they
fall off bolts.
H. Shift heads and cylinders to properly align intake manifold.
I. Final tighten base nuts to at least factory torque specs.
J. Final tighten head bolts to at least factory torque specs. Tighten knucklehead bolts using allen wrench and short piece of pipe.
K. Check head bolts and base nuts after engine has been run and retighten if necessary.
NOTES:
• Oil supply lines to heads must be fabricated. Design will depend on cases used.
• Oil pumps from 1968 and later produce higher oil pressure and greater volume than original knucklehead oil pumps. Additional oil to knuckleheads
may be difficult to return. If so, restrict oil to heads by soldering oil supply tubing fitting in cases shut and meter by redrilling with smaller hole. We
recommend no smaller than .0625" (1⁄16"). Our 98", 43⁄4" stroke test engine had a 1977 lower end and was assembled exactly by our instructions. Oil
pump generated 30 Ibs. pressure and return system worked flawlessly without metering.
Low or no oil flow to cylinder heads may damage rocker arms and/or other valve train components.
1984–'99 Model Top End Assembly Procedure
A. Thoroughly clean all top end parts and blow dry with compressed air. Use high grade lacquer thinner on gasket surfaces.
B. Install base gaskets dry. Be sure gaskets match cylinder base line up dowels and oil return passageways.
C. Install pistons and rings per piston instructions.
CAUTION
CAUTION
CAUTION