Float Bowl Disassembly; Throttle Body Removal And Disassembly - Pontiac Grand Prix Service Manual

6B-8 1 9 6 9 PONTIAC SERVICE MANUAL
3. If desired, the choke valve, vacuum break lever and
choke shaft can be removed from air horn by
removing two choke valve screws. Staking on choke
valve screws should be fded off before removing so as
not to ruin threads and distort choke shaft.
4. No further disassembly of the air horn is necessary.
The idle vent valve can be removed by turning screw
head out of plastic guide. A repair kit is available if
replacement parts are needed.
NOTE: The cranking enrichment valve is not remov-
able. Make sure afier cleaning that cleaning solution is
completely removed from valve cavity and bleed hole in
valve retainer is open.
FLOAT BOWL DISASSEMBLY (Fig. 6B-28)
1. Remove air horn to float bowl gasket. Gasket is slit
next to metering rod lever so that it can be slid over
lever for ease in removal.
2. Remove float from float bowl by lifting upward on
float hinge pin. Remove hinge pin from float arm.
3. Remove float needle, then remove float needle seat
and gasket.
4. Remove fuel inlet nut and gasket, then remove filter
element and pressure relief spring.
5. Using long nosed pliers, remove 'T' pump discharge
guide. Pump discharge spring and ball may be
removed by inverting bowl.
6. The idle tube can be removed at same time by
inverting bowl.
7. To remove accelerating pump plunger and power
piston
-
metering rod assemblies, remove actuating
lever on throttle shaft by removing attaching screw in
end of shaft.
8.
Hold the power piston down in float bowl, then
remove power piston drive link by sliding out of hole
VACUUM BREAK LEVER
.
-IDLE VENT VALVE
vmw
BREAK
Fig. 6B-14 Air Horn Disassembly
FUYT
NEEDLE
B
SEAT ASSEMBLY
Fig. 6B-15 Float Bowl Disassembly
in power piston plunger rod. The power piston
- .
metering rod can now be removed from float bowl.
NOTE: The metering rod can be removed fiom holder
on power piston by pushing downward on end .of rod
against spring tension. Then slide narrow neck of rod out
of slot in rod holder.
4
9. Remove power piston spring from power piston
cavity.
10. Remove power piston drive link from throttle
actuating lever by aligning lip on rod and notch in
lever.
11. Remove actuating lever from accelerator pump
drive
link in
same manner. Note position of actuating
lever for ease in reassembly.
12. Hold the pump plunger down in bowl cavity and
remove drive
link
from pump plunger shaft by rotating
link until lip on link aligns with notch in plunger shaft.
13. Remove pump plunger from float bowl.
14. Remove pump return spring from pump well.
15. Remove main metering jet from bottom of float
bowl.
16. Remove two screws from idle compensator cover.
Then remove cover, hot idle compensator and seal
from recess in bowl b e ~ e a t h compensator.
17. Idle screw and fast idle cam can be removed at this
time if desired.
No further disassembly of the float bowl is required.
THROTTLE BODY REMOVAL AND DISASSEMBLY
(Fig. 6B-16)
1. Invert carburetor bowl on bench and remove two