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Install The Pipe Plugs Or A Temperature Sender In the
Intake Manifold
1. Use caution when installing fittings, pipe plugs, studs or bolts that
screw into the aluminum intake manifold to avoid damaging
threads or cracking mounting bosses.
2. Use thread sealer on all threads that go into coolant, oil, or port
passages. See Figure 16.
3. Install a heater hose nipple and a vacuum line nipple at this time
if needed.
Install The Carburetor
1. The carburetor is calibrated for this engine. The carburetor needs no major adjustment. However, the jets may need to be
changed for high altitude or for extremely hot or cold weather. If you have any tuning question about the carburetor please
call Holley's tech line (270) 781-9741.
2. The carburetor needs seven psi of fuel pressure at idle and a minimum of four psi at wide open throttle. Use 3/8" ID or
larger fuel lines. Install a quality in-line fuel filter between the fuel pump and the carburetor.
3. Screw the carburetor mounting studs into the carburetor mounting bolt holes of the intake manifold.
4. Install the carburetor mounting gasket over the studs and onto the intake manifold flange.
5. Install the carburetor to the intake manifold.
6. Torque the mounting nuts in a "crisscross" pattern to 20 ft-lbs.
7. Connect all the fuel lines, linkages, throttle springs, and vacuum lines after the engine has been installed in the vehicle.
8. Connect a ground wire and a power wire to the electric choke.
9.
Install The Thermostat
1. The thermostat, the thermostat gasket, the thermostat housing, and the thermostat
housing bolts are not included with this engine package. Please see your dealer for
the proper thermostat, gasket, and housing for your vehicle. A 180° thermostat is
recommended for this engine.
2. Install a thermostat in the intake manifold. Place a new thermostat housing gasket
onto the intake manifold. Align the bolt holes on the gasket with the bolt holes in the
intake manifold. Install a thermostat housing on the thermostat and the gasket.
Apply thread sealer to the threads of the thermostat housing bolts. Torque the bolts
to 25 ft-lbs. See Figures 17 and 18.
FRONT
INTAKE MANIFOLD
ASSEMBLY
FIGURE 17
502/502 Big Block Chevrolet Engine Pkg.
TITLE
THERMOSTAT (NOT INCLUDED)
ALL GASKET MATING
SURFACES TO BE FREE
OF OIL AND FOREIGN
MATERIAL
INTAKE MANIFOLD ASSEMBLY
REV 16JA15
PIPE PLUG
FRONT
SEALER
BYPASS HOSE CONNECTOR
FIGURE 16
THERMOSTAT HOUSING BOLTS
FIGURE 18
12368083
PART NO.
SEALER
PIPE PLUG
INTAKE MANIFOLD
ASSEMBLY
(NOT INCLUDED)
THERMOSTAT HOUSING
(NOT INCLUDED)
THERMOSTAT HOUSING
GASKET
(NOT INCLUDED)
FRONT
9
63
SHEET
OF
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