Billet Specialties 11421 Compressor Bracket - Manual

1. Use Loctite® removable threadlocker 242 (blue) on all fasteners.
2. Mounting for late model heads with 3 tapped holes in passenger
side head. Bolt compressor bracket [A] to passenger side head using
bolt [D] 3/8-16 x 4” SHCS, [E] 3/8-16 x 1-1/4” SHCS & [F] 3/8-16 x 1-1/4”
SHCS. Tighten.
NOTE: Optional mounting on early heads may be required. If not, Skip
to step 6.
3. OPTIONAL: For mounting with early heads (Pre-1987) with only 1 drilled
and tapped hole on passenger side head. Attach bracket [C] to
bracket [A] using bolt [G] 5/16-18 x 1-1/2” FHCS & [H] ¼-20 x 1-1/4”
SHCS. Bolt location [H] in bracket [A] needs to be drilled through with
a ¼” drill bit for this application.
4. Bolt bracket [A] & [C] to head using bolt [D] 3/8-16 x 4” SHCS; to
water pump using bolt [I] 3/8-16 x 2-1/4” SHCS. Shims may be needed
at water pump to compensate for casting variances. Spot drill head
at bolt position [E] using a 25/64” drill bit to provide adequate start for
tap drill. Remove bracket [A] & [C] and drill head using a 5/16” drill bit
to a depth of 1”. Hand tap head with a 3/8-16 tap to provide at least
3/4” of thread.
5. Reinstall bracket [A] & [C] and shim between bracket [A] & head
at bolt location [E] 3/8-16 x 1-1/4” SHCS to compensate for casting
variances. Bolt bracket [C] to water pump using bolt [I] 3/8-16 x 2-
1/4” SHCS. Shims may be needed at water pump to compensate for
casting variances. Tighten bolts: [D], [E], [I].
6. Bolt compressor adjustment arm [B] to the inside of the front ear of
the Sanden 508 compressor using bolt [M] 3/8-16 x 1” SHCS. Tighten.
7. Bolt Sanden 508 compressor with bracket [B] to bracket [A] using bolt
[J] 3/8-16 x 1-1/4” SHCS, [K] 3/8-16 x 1-3/4” SHCS, & [L] 3/8-16 x 1-1/4”
SHCS. Do not tighten.
8. Install compressor belt on front groove when using 2-groove pulleys.
9. Apply tension on compressor belt and tighten bolts [J] 3/8-16 x 1-1/4”
SHCS, [K] 3/8-16 x 1-3/4” SHCS, & [L] 3/8-16 x 1-1/4” SHCS.
#11421 Compressor Bracket Mounting Instructions
Side Mount - Passenger Side
BILL OF MATERIALS
ITEM QTY. DESCRIPTION SIZE
A 1 Compressor Main Bracket
B 1 Compressor Adjustment Arm
*C 1
Compressor Main Bracket To Water
Pump Connector Bracket
D 1 3/8”-16 Socket Head Cap Screw 4”
E 1 3/8”-16 Socket Head Cap Screw 1-1/4”
F 1 3/8”-16 Socket Head Cap Screw 1-1/4”
*G 1 5/16”-18 Flat Head Cap Screw 1-1/2”
*H 1 1/4”-20 Socket Head Cap Screw 1-1/4”
*I 1 3/8”-16 Socket Head Cap Screw 2-1/4”
J 1 3/8”-16 Socket Head Cap Screw 1-1/4”
K 1 3/8”-16 Socket Head Cap Screw 1-3/4”
L 1 3/8”-16 Socket Head Cap Screw 1-1/4”
M 1 3/8”-16 Socket Head Cap Screw 1”
W 1 Stainless Load Washer 3/4” x 3/16”
X 4 Stainless Flat Washer 3/4” x .060”
** 2 Stainless Flat Washer (Shims) 3/4” x .032”
** 2 Stainless Flat Washer (Shims) 3/4” x .010”
Billet Specialties • 500 Shawmut Avenue • La Grange, Illinois 60526• Tech 708-588-0505 • Fax 708-588-7181
For use with:
• Chevy small block
• Long water pump
• Sanden 508 compressor
X
M
K
X
J
W
D
I
C
F
E
X
L
B
A
H
G
*
*
*
*
* Denotes optional mounting sequence for AC
bracket. See instructions for details.