Carburetor (5.9L) R & I: Reassembly
- To assemble carburetor, reverse disassembly procedure. Use new gaskets and seals. Make sure that new gaskets fit correctly and that all slots are punched through and are correctly located.
- When installing replacement inlet check valve, lubricate tip of new valve, and insert tip into center hole of accelerator pump cavity. Insert needle nose pliers in fuel bowl, and pull valve in until fully seated. Cut off excess valve tip at retaining shoulder, and remove tip from fuel bowl.
- When installing idle mixture screws, turn screws in with fingers until lightly seated. DO NOT
install idle screw limiter caps at this time. Adjust idle mixture with carburetor installed on vehicle. Adjust float level. Remove air horn assembly and gasket. Raise float by pressing down on float tab until inlet needle is slightly seated.
- Use a "T" scale to measure distance from fuel bowl machined top surface to a flat surface on either corner of the float at the free end. Refer to the CARBURETOR ADJUSTMENT SPECIFICATIONS
table. See Fig 1
. Hold fuel inlet needle off its seat while adjusting to prevent damage to synthetic tip of needle. Bend float tab to adjust float level.
Courtesy of CHRYSLER MOTORS.
- Adjust choke valve and fast idle cam clearances. Open throttle to allow choke mechanism to set and fast idle screw to set on top stem of cam. Apply vacuum to hold choke diaphragm against setscrew while using finger pressure to load choke diaphragm stem in direction opposite diaphragm. DO NOT
press on linkage rods.
- Measure clearance between top of choke valve and air horn. See CARBURETOR ADJUSTMENT SPECIFICATIONS
table. Adjust clearance by turning screw at rear of choke vacuum diaphragm. Push down on fast idle cam lever until fast idle speed adjustment screw is in contact with second step of fast idle cam and against shoulder of high step.
- Measure clearance between upper edge of choke valve and air horn wall. See CARBURETOR ADJUSTMENT SPECIFICATIONS
table. Adjust clearance by turning fast idle cam lever screw. See Fig 2
.
Courtesy of CHRYSLER MOTORS.
- Adjust choke unloader. Hold throttle fully open and apply pressure on choke valve toward closed position. Measure clearance between lower edge of choke valve and air horn wall. See the CARBURETOR ADJUSTMENT SPECIFICATIONS
table.
- Adjust clearance by bending unloader tang toward cam to increase clearance and away from the cam to decrease clearance. See Fig 3
. DO NOT
bend unloader tang downward from horizontal plane. After completing adjustment, open throttle until unloader tang is directly below fast idle cam pivot. Clearance between unloader tang and edge of fast idle cam must be .07" (1.8 mm).
Courtesy of CHRYSLER MOTORS.
- Operate throttle and ensure smooth operation of unloader tang. After carburetor has been installed, check for full throttle opening when throttle is operated from inside vehicle. If full throttle opening is not obtainable, it may be necessary to remove excess padding under floormat or reposition throttle cable bracket located on engine.