The positive crankcase ventilation system on all 1968 and subsequent model year gasoline-powered motor vehicles, except motorcycles and motor tricycles, and all 1969 and subsequent model year gasoline-powered motor vehicles, including motorcycles and motor tricycles, shall meet the following requirements:

1. (a) The plumbing and connections shall be properly connected as installed by the manufacturer and free of obstructions and leakage.
2. (b) There shall be a negative pressure (suction) at the inlet of the crankcase ventilation valve.
3. (c) The crankcase ventilation valve shall be freely operative so as to regulate the flow of gases through the system.

Author: James W. Cooper, John E. Daniel

Statutory Authority: Code of Ala. 1975, §§22-28-14, 22-22A-5, 22-22A-6, 22-22A-8.

History: Effective Date: September 24, 1972. Amended: Filed August 3, 2000; effective September 7, 2000.