Top view driveside camside – S&S Cycle Head Bolts for 1984–12 Harley-Davidson Big Twin & 1986–12 Sportster Models User Manual
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In sufficient thread depth inside head bolt may result in base or head gasket failure and possible engine damage.
3. Before final installation visually inspect studs and bolts, then carefully turn each head bolt down on its respective stud to be sure threads are
clean.
4. Remove head bolts and place a light film of 20W50 motor oil on head bolt threads and contact faces of head bolts and washers. Confirm that
washers are correct for each head bolt according to chart.
NOTE: Proper lubrication minimizes friction to insure accurate torque values.
Incorrect tightening procedure may result in damage to head bolts or cylinder base/head gasket failure.
5. Install head gaskets, cylinders, and head bolts according to manufacturer’s instructions.
6. If using crankcases other than S&S®, tighten head bolts according to manufacturer’s specifications. If using S&S crankcases, gradually tighten
head bolts according to sequence in Figure 2.
• Incorrect torquing sequence or torque values may damage head bolts or cause cylinder base/head gasket failure.
• Exceeding recommended torque values may pull cylinder studs out of crankcases.
7. Complete top end assembly according to normal procedure. Refer to Harley-Davidson® or S&S service manual as needed.
8. Upon initial start-up, quickly confirm oil pressure and check for gas and oil leaks. With minimal load on engine, ride motorcycle at low speeds
until engine reaches normal operating temperature. Do not crack throttle or subject engine to heavy load during this time.
NOTE: Heat build-up should be gradual for correct gasket seal.
Failure to follow recommended installation and break-in procedures may damage gaskets and other engine parts.
CAUTION
CAUTION
CAUTION
1
2
4
3
2
1
3
4
Top View
Driveside
Camside
Rear Head
Front Head
S&S® Crankcases
Stock Crankcases
Stage 1
8 Ft. Lbs.
7-9 Ft. Lbs.
Stage 2
18 Ft. Lbs.
12-14 Ft. Lbs.
Stage 3
Turn additional 90˚
or 1⁄4 turn
Turn additional 90˚
Figure 2