Billet Specialties V-Trac Pulley System User Manual
INSTALLATION MANUAL
CHEVROLET BIG BLOCK
V4120 / V4220
Billet Specialties, Inc.
500 Shawmut Avenue
La Grange, Illinois 60526
TECH Line 708.588.0505
Fax 708.588.7181
www.billetspecialties.com
PLEASE READ ALL INSTRUCTIONS BEFORE INSTALLING ANY
COMPONENTS OF THE V-TRAC PULLEY SYSTEM
Tech Line: 708.588.0505
Fax: 708.588.7181
www.billetspecialties.com
Required Tools & Materials
Anti-seize Compound
RTV Silicone
Gasket Scraper
Scotch-Brite® Pad
3/8-16 Thread Chaser* & Holder
7/16-14 Thread Chaser*
*Thread chasers are available at your
local parts store and are different from
a thread cutting tap.
11/16” Combo Wrench
3/4” Combo Wrench
Socket Wrench & Extension
10mm 12pt. socket
12mm 12pt. socket
Skin Board #1 - Packaged with Power Steering Pump
5/16-24 x 3” Socket Head Cap Screw
(Power Steering Pump)
x2
7/16-14 x 2-1/4” Socket Head Cap Screw
(Power Steering Bracket)
x2
3/16” Allen
5/16” Allen
1/4” Allen
3/8” Allen
6mm Allen
x2
5/16”
Lock Washer
Skin Board #3 - Packaged In Main Box
x7
8mm-1.25 x 25mm
12pt. Cap Screw
(Bridge Bracket)
10mm-1.5 x 80mm 12pt. Cap Screw
(Alternator)
x3
3/8-16 x 1” Socket Head Cap Screw
(Crankshaft Pulley)
x2
3/8” Belleville Washer
(Crankshaft Pulley)
x4
O-Ring Set
x3
x1
8mm Slide Spacer
x2
10mm x .5mm
Shim Washer
x2
10mm x 1mm
Shim Washer
x2
Skin Board #2 - Packaged with Water Pump
3/8-16 x 3” Block Mounting Stud
Spacer Nut - 3”
7/16-14 x 1-1/2” Socket Head Cap Screw
(Alternator Bracket - Not used with Power Steering Kits)
x4
x4
x2
3/8-16 Zinc Coated
Hex Nuts
(Discard After Use)
x1
Compressor Shoulder Bolt
(A/C Compressor)
x3
1/4-20 x 3/4”
Socket Head Cap Screw
(Compressor Cover)
Other Hardware
Goodyear Gatorback V-Belt - Compressor 44-1/2”
Goodyear Gatorback V-Belt - Alternator 43” (w/o Power Steering) - 45” (w/ power steering)
8mm-1.25 x 25mm
Socket Head Cap Screw
(A/C Manifold)
x1
Compressor Shoulder
Bolt Washer
x2
5/16-24x1/2”
Socket Head Cap Screw
(Water Pump Pulley)
x4
Figure 1: Prepping The Block
Disconnect battery & remove all existing accessory drive brackets and
components from motor.
Remove water pump, scrape away any existing gasket material with a gasket
scraper and dress surface with a Scotch Brite® pad.
Clean and prep threads on engine block at water pump (3/8-16) and driver side
bosses (7/16-14) by crank (for power steering kits). Use a 3/8-16 & 7/16-14 thread
chaser if necessary. Thread chasers are available at your local auto parts store or
tool dealer and are different from a thread cutting tool.
Apply RTV sealer to one end of the four 3/8-16 x 3” threaded studs and thread
studs into the water pump mounting holes and tighten.
The studs can easily be tightened by threading two 3/8-16 zinc coated nuts onto
the stud and tighten them against each other to act as a drive nut.
*Example
Figure 2: Install Alternator & A/C Brackets
Install the large O-rings into both sides of the passenger side compressor bracket
by seating them into the recessed groves. Place bracket over studs and seat up
against engine block.
Install the large O-rings into both sides of the driver side alternator bracket by
seating them into the recessed groves. Place bracket over studs and seat up
against engine block.
For kits with power steering – apply anti-seize to the threads of the two
7/16-14 x 2-1/4” socket head cap screws and thread through the power steering
bracket, alternator bracket and into engine block and finger tighten.
For kits without power steering – apply anti-seize to the threads of the two
7/16-14 x 1-1/2” socket head cap screws and thread through the alternator
bracket and into engine block and finger tighten.
TECH LINE: 708-588-0505 FAX 708-588-7181 www.billetspecialties.com
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