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Home >> Chevrolet >> 1985 >> Forward Control 4.8 T, Automatic, 475/M40 >> Repair and Diagnosis >> Engine Performance >> System >> Carburetor - ROCHESTER M4M Series 4-Bbl >> Overhaul >> Disassembly >> Choke Cover

Choke Cover

The choke assembly is attached with rivets to discourage tampering. For complete carburetor overhaul, cover must be removed.

1) Support float bowl and throttle body, as an assembly, on holding fixture. Align a 5/32" (No. 21) drill on rivet head and drill just enough to remove head. Repeat for all 3 rivets.

2) Use a drift and small hammer to drive the remainder of the rivets out of the choke housing. Remove choke retainers (3), and choke cover gasket (M4MC only, if used). Remove choke cover.