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Home >> Oldsmobile >> 1987 >> Custom Cruiser >> Repair and Diagnosis >> Engine Performance >> System >> Carburetor - ROCHESTER E4MC/E4ME >> Overhaul >> Reassembly >> Float Bowl Assembly

Float Bowl Assembly

  1. Install new float bowl to throttle body gasket over locating dowels on bottom of float bowl. Install throttle body over dowels on float bowl. Install 3 throttle body mounting screws and tighten securely.
  2. Support carburetor with Holding Fixture (C 38886) to avoid throttle plate damage. Install fuel inlet filter spring, a new filter assembly, new gasket, and inlet nut. Tighten nut to 216 INCH lbs. (24 N.m).
  3. Install new cup seal into insert on side of float bowl for intermediate choke shaft. Lip on cup seal faces outward. Install secondary throttle valve lock-out lever on float bowl boss with recess in lever hole facing inward.
  4. Install fast idle cam on intermediate choke shaft with steps on cam facing downward. Carefully install fast idle cam and intermediate choke shaft assembly in choke housing. Install thermostatic coil lever on flats on intermediate choke shaft. Inside thermostatic choke coil lever is properly aligned when both inside and outside levers face toward fuel inlet. See ADJUSTMENTS  in this article.
  5. Install inside lever retaining screw into end of intermediate choke shaft and tighten securely. Install lower inner choke rod lever into cavity in float bowl. See ADJUSTMENTS  in this article.
  6. Install choke housing to bowl, sliding intermediate choke shaft into lever. A pair of needle-nose pliers may be used to hold lower lever in correct position while installing the choke housing. The intermediate choke shaft lever and fast idle cam are in correct position when the tang on lever is beneath the fast idle cam. See ADJUSTMENTS  in this article.
  7. Install choke housing retaining screw and washer and tighten securely. If removed, install air baffle in secondary side of float bowl with notches toward the top. Top of baffle must be flush with bowl casting.
  8. If removed, install baffle inside of pump well with slot toward bottom. Install pump discharge ball and retainer screw. Tighten retainer screw securely. If removed, carefully install primary main metering jets.
  9. Install large mixture control solenoid tension spring over boss on bottom of float bowl. Install needle seat assembly with gasket. To make adjustment easier, carefully bend float arm upward slightly at notch in arm before assembly. See ADJUSTMENTS in this article.
  10. Install float needle onto float arm by sliding float lever under needle pull clip. Proper installation of the needle pull clip is to hook the clip over the edge of the float on the float arm facing the float pontoon.
  11. Install float hinge pin into float arm with end of loop of pin facing pump well. Install float assembly by aligning needle in the seat and float hinge pin into locating channels in float bowl. DO NOT  install float needle pull clip into holes in float arm.
  12. Perform float adjustment. See ADJUSTMENTS  in this article. Install feedback solenoid tension spring. Install feedback solenoid. Check that pin on bottom of solenoid is aligned with hole in bottom of bowl.
  13. Insert lean mixture screw through hole in solenoid bracket and install screw so that at least the first 6 threads of screw are engaged in bowl. Install Gauge (C 4899) over the left metering jet rod guide and install solenoid plunger. See ADJUSTMENTS  in this article.
  14. Hold plunger against solenoid and turn solenoid screw using Gauge (C 4898) until solenoid plunger contacts gauge. See ADJUSTMENTS  in this article. Remove solenoid plunger and gauge. Install feedback solenoid attaching screw. Install filler block, metering rod and spring assemblies.
    NOTE: DO NOT  force metering rod into jet. Use extreme care in handling these parts to avoid damage to rods and springs. If metering rods, jets and springs are replaced they must be installed in matched sets.
  15. Install pump return spring in pump well. Install pump plunger assembly in pump well. Hold down pump plunger and install air horn gasket. Position gasket over locating pins on float bowl.
  16. Hold down on air horn gasket and pump plunger and install feedback solenoid plunger. Check that plunger arms engage top of each metering rod. If feedback solenoid is replaced, solenoid and plunger must be installed as a matched set.
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