S&S Cycle Big Twin Engines with 3-1/2 and 3-5/8 Bore Crankcases and Special Application (SA) 4 Bore Crankcases - Manual (Page 10)

10. Apply very light film of motor oil to piston skirts and
cylinder bores and install rear cylinder. Refer to Installation
Instructions for S&S
® Sidewinder ® Big Bore Cylinders #1000,
pages 12-13. Install rear cylinder head, referring to following
section as necessary.
NOTE - IOn big twin engines, if engine builder chooses to install
front cylinder before installing rear head, rear cylinder should be
temporarily secured with head bolt and washers. If cylinder not
secured, piston can lift cylinder and disturb base gasket if
flywheels rotated.
11. Repeat piston installation for front cylinder and
cylinder head.
INSTALL CYLINDER HEADS (All Unassembled)
For big twin engines, complete installation per Super Stock ®
Cylinder Head Instruction Sheet #51-1042. For shovelhead
engines, refer to Installation Instructions for S&S Sidewinder
® Big
Bore Cylinders #51-1014. Note that shovel intake manifold and
top end oil supply lines should be installed before headbolts
tightened on shovelhead engines. If S&S shovelhead heads used,
rocker cover assemblies must be installed using cap screws
provided by S&S.
NOTE - S&S shovelhead engines are supplied with several
different camshafts. S&S cylinder heads assembled by S&S are
compatible with all. Stock heads are not. If different camshaft,
non-S&S heads, or S&S heads assembled by other source are used,
engine builder must confirm lift capability of valve springs and
collars as well as valve-to-valve clearance. Refer to Installation
Information for S&S big twin camshafts.
Failure to establish correct clearances can cause extensive
engine damage not covered under warranty.
PUSHROD PREPARATION (All)
1. Disassemble pushrods and pushrod tube covers (covers not
supplied with engine). Clean thoroughly and dry with
compressed air.
2. For big twin style pushrods, blow compressed air through oil
passage in each pushrod to confirm that passage is clean and
free of debris and obstruction. See Picture 23.
3. Assemble pushrod tube cover assemblies according to
Harley-Davidson ® Service Manual.
4. Insert pushrod tube O-ring spacers in lifter blocks (big twin).
See Picture 24.
5. Install O-rings or corks in lifter blocks. Normally corks are
used only with shovelheads.
6. Install thick pushrod tube O-rings or corks in cylinder heads.
7.
Determine pushrod placement by comparing lengths of each
pushrod (not including adjuster). Longest pushrod is for
front exhaust, next longest for rear exhaust, shortest for rear
intake, remaining pushrod for front intake. See Picture 25.
Refer to Pushrod Instruction Sheet #51-1035 as needed.
8. Screw pushrod/lifter adjusters in to shortest length and set
pushrods aside.
10
Picture 23 Picture 24
CAUTION
Picture 25