Engine Fuel; Carburetor Air Cleaner And Silencer; Heat Riser Valve; Intake Systems - Pontiac Grand Prix Service Manual

ENGINE FUEL
Section 6B
-
Engine Fuel
CONTENTS OF THIS SECTION
SUBJECT PAGE SUBJECT PAGE
Carburetor Air Cleaner and Silencer
. . . .
.6B-1
Ram Air Intake System.
. . . . . . . . . . .
.6B-
1
Idle Stop Solenoid
. . . . . . . . . . . . . . .
.6B-5
Accelerator Linkage and Adjustment
. . . . .
Rochester M V Monojet Carburetor.
. . . . .
.6B-7
. . . . . . . . . . . . .
Adjustments- on Car.
Overhaul and Adjustments
: . . . . . . . . .
6B-7
Rochester 2GV Carburetor.
. . . . . . . . .
. 6 B - 4
CARBURETOR AIR CLEANER AND
SILENCER
Adjustments on Car.
. . . . . . . . . . . .
. 6 ~ - 1 3
Periodic Service
. . . . . . . . . . . . . .
. 6 ~ - 1 3
Overhaul and Adjustment.
. . . . . . . . .
. 6 ~ - 1 3
Rochester 4MV Quadrajet Carburetor.
. . .
.6B-20
Adjustments on Car.
. . . . . . . . . . . .
.6B-20
Periodic Service
. . . . . . . . . . . . . .
. 6 ~ - 2 0
Overhaul and Adjustment.
. . . . . . . . .
.6B-20
Specifications
. . . . . . . . . . . . . . . . . .
6 ~ - 3 8
plenum where it is directed to the carburetor intake via
the air cleaner.
HEAT RISER VALVE
A combined air cleaner-silencer and air preheater,
with an oil wetted paper element is standard on all
Use of the carburetor air pre-heater has resulted in
models.
improved engine warm-up characteristics and conse-
quently, eliminated the nted for the heat riser valve on
A dual snorkel air cleaner is used on all standard
all V-8
and six cylinder 1 Bbl. applications. Six
GTO's.
cylinder 4 Bbl. engines are not affected by this change
and continue to use the heat riser valve.
An optional heavy duty dual stage air cleaner is
available on all models except the 428 H.O. engine,
GTO, and Tempest Sprint.
This air cleaner consists of a replaceable oil wetted
paper inner filter surrounded by a glycol wetted
polyurethane foam outer filter.
The polyurethane element and crankcase ventilation
filter should be washed in solvent and re-oiled using
SAE 30 engine oil at 12,000 miles or 12 months.
NOTE:
Clean and re-oil after each occasion of driving
under severe dust conditions. Allow excess oil to drain
out offilter prior to installation.
INTAKE SYSTEMS
-
RAM AIR
RAM AIR (Fig. 68-7)
The Ram Air system, available on GTO Ram Air and
Ram Air N (exc. 2 Bbl.) and Firebird 400 H.O. and
Ram Ajr N , is designed to allow the driver to make
available two sources of air to the carburetor.
Control of the source is made by a valve mounted
behind the hood scoops, which is operated by a cable
from inside the car. Air enters either through the hood
scoops or from under the hood as determined by the
position of the valve. The
air
is then routed to a
Fig. 68-1 Air Cleaner Installation
-
6 Cyl.
CLAMP MUST BE INSTALL
IN POSITION SHOWN.
1 BBL. CARB.