Cutlass Supreme V8-307 5.0L VIN Y 4-bbl (1985)
Air Injection Check Valve: Testing and Inspection
1.
Remove check valve(s) from vehicle.
2.
Blow through check valve in direction of air manifold or cylinder head, then attempt to suck back in reverse direction. Air flow should only be
towards air manifold or cylinder head. If not, replace check valve.
