ROCHESTER 1ME Single Barrel: Overhaul: Reassembly

To reassemble carburetor, reverse disassembly procedure noting the following:

1. Adjust float level and metering rod before installing air horn. All other adjustments are made with carburetor assembled.
2. Install metering rod with spring above power piston.
3. Thermostatic spring in idle compensator must hold valve closed after installation. Replace unit if spring is bent or distorted. Do not attempt to straighten or adjust spring.
4. Use two tapered head screws for mounting and locating diaphragm bracket. Install and tighten air horn screws evenly and in sequence shown in Fig 1.
   NOTE: If choke coil cover was removed, it will be necessary to install replacement rivets supplied in service kit. Do not use a gasket between choke housing and cover, as direct contact is needed to ground electric coil housing.
5. Place fast idle screw on high step of fast idle cam. Install choke coil cover, aligning notch in cover with raised boss on housing cover flange. Install self-tapping screws and tighten.
   NOTE: When torquing carburetor after removal, tighten bolts in a clockwise direction to 198 INCH lbs. When retorquing at recommended intervals, retorque to 144 INCH lbs. maximum.
   CAUTION: Do not use a gasket between choke housing and electric coil. Coil is grounded through housing.
6. Install vacuum diaphragm hose to diaphragm tube and connect to vacuum extension on bowl.
   NOTE: When installing carburetor on intake manifold, install insulator, then carburetor. Tighten 2 nuts to 36 INCH lbs., then tighten nuts to 18 ft. lbs.
   Fig 1: Air Horn Tightening Sequence

   Courtesy of GENERAL MOTORS COMPANY