Carburetor - ROCHESTER M4MEF 4BBL: Overhaul: Reassembly
- To assemble carburetor, reverse disassembly procedure. Use new gaskets and seals. Ensure new gaskets fit correctly. Ensure all holes and slots are punched through and correctly located.
- Turn idle mixture adjusting screws in until lightly seated, then back out number of turns recorded during disassembly. If number is unknown, back out 3 turns as a preliminary adjustment.
- Install fuel inlet needle pull clip over edge of flat on float arm facing float. DO NOT
hook clip in holes in float arm. Install plastic float bowl filler block after float level adjustment and before metering rod installation.
- When installing new pump plunger stem seal and retainer in air horn, the lip on seal faces out. Lightly stake seal retainer in place at 3 locations, different from original stakings.
Courtesy of GENERAL MOTORS CORP.
- When installing air horn screws, countersunk screws (2) are installed next to venturi area. Install secondary air baffle under screws No. 2 and 4. Tighten air horn screws evenly and in sequence. See Fig 2.
- Install accelerator pump rod link in hole of pump lever as noted during disassembly. Intermediate choke shaft lever and fast idle cam are installed correctly when tang on lever is beneath fast idle cam.
- Make all choke coil lever adjustments before installing choke cover assembly. Place fast idle screw on high step of fast idle cam and ensure coil tang engages inside coil pick-up lever. Install choke cover with rivets supplied in kit.
Courtesy of GENERAL MOTORS CORP.