Edelbrock Later Harley-Davidson 1604 Installation Instructions Manual page 3

Figure 2 - Pushrod and Cover Assembly
REMOVE ROCKER ARM COVERS
1. Remove bolts (1) and seals (2) (See Figure 1) . Use a shortened
3/16" allen wrench.
2. Remove top (3) and middle (4) sections of rocker box. Remove
gaskets (5, 6, and 7) and discard.
3. Rotate the engine so both valves are closed on the head being
removed.
4. Remove the rocker arm retaining bolts (11) and washers nearest the
rocker arm shafts at the push rod end.
NOTE: Remove lower rocker boxes as an assembly then
disassemble if necessary.
5. Remove the push rods (1) and mark their location and orientation,
top and bottom (See Figure 2) .
6. Remove spring cap retainers (2) on push rod covers and remove
push rod covers and associated parts (3 through 11) (See Figures
2 & 3) .
All valve train components must be reinstalled in their
original positions. Remove Spring Cap Retainers.
Figure 3 - Removing Spring Cap Retainers
Catalog #1604, 1606, 1607, 1624, 16041 & 16061
Rev. 3/07 - RS/mc
1. Push rod (2)
2. Spring cap retainer (2)
3. Upper push rod cover (2)
4. Spring cap (2)
5. Spring (2)
6. Spacer (2)
7. O-ring (2)
8. Lower push rod cover (2)
9. O-ring (2)
10. Spacer (2)
11. O-ring (2)
12. Tappet (2)
13. Bolt (4)
14. Lifter guide (2)
d15. Gasket (2)
CAUTION
7. Remove the remaining fasteners (12, 13 and 14) holding the lower
rocker arm cover (17) to the cylinder head (See Figure 1) .
8. Remove the lower rocker cover and gaskets (15 and 16).
9. See Figure 4 . Loosen each head bolt (1, 2) 1/8 turn following the
cross pattern sequence shown in Figure 9
Loosen head bolts gradually, in a cross pattern, to
prevent distorting the head, cylinder and crankcase
studs.
10. Continue loosening in 1/8 turn increments until bolts are loose.
11. Remove bolts.
12. Remove cylinder head and head gasket.
13. Repeat steps 1 through 14 for the other head.
NOTE: It may be necessary to raise or lower engine in frame
for clearance. Use small jack under engine.
Figure 4 - Cylinder Head and Cylinder
1. Head bolt, long (2)
2. Head bolt, short (2)
3. Cylinder head gasket
4. Inner valve spring (2)
5. Outer valve spring (2)
6. Valve keeper (4)
7. Upper collar (2)
8. Lower collar (2)
9. Valve (1) intake, (1) exhaust
3 of 6
CAUTION
10. Valve stem seal (2)
11. Cylinder stud (4)
12. Cylinder base gasket
13. O-ring and insert (2)
14. Valve guide (2)
15. Valve seat (2)
16. Cylinder head (2)
17. Cylinder (2)
18. Piston
©2007 Edelbrock Corporation
Brochure #63-1604