Smog pump.. also known as the AIR PUMP, usually located on the front RHS of the V8.

THIS IS A "METRIC" THREAD PUMP.. Has CAST WITH "METRIC" on the back housing.

• Make sure to test your Air Pump Check Valve for proper operation. A defective check valve will allow harmful exhaust gases to enter and destroy a new Air Pump.

Should have cast on the rear #78178782" 

These are a quality reliable USA remanufactured pumps.

• No exchange nesseccary.
•   NOTE THIS FITS 1987 Firebird or Camaro 305 & 350 V8
•   THIS FITS  Firebird ONLY..1987.

• A NOTE ON SMOG PUMP CARE.... Preventing Smog Pump Seizures

  Smog Pump failure is usuall caused by Gasoline, exhaust fumes, oil, or water entering the unit contaminates the bearing grease causing bearing failure.

  Before installing replacement unit, test check valve(s) for proper operation. Air should pass through valve only in one direction. These valves prevent exhaust gases from entering the unit. DO NOT install pump with a defective check valve. Check the PCV system for proper operation.

  An inoperative or defective PCV system allows oil and gas fumes to enter Smog Pump, causing bearing failure.

  Water contamination causes bearing corrosion, internal component damage, or housing failure. To help prevent this problem, carefully inspect all hoses, make sure fittings are secure, pump filters are not clogged, and the fan is not damaged. Be careful when washing the engine and, on low-mounted units, avoid driving through high water.

•  NOTE: Remanufactured AIR PUMPS are tight when first supplied and require an average
  500 mile run in period during which time noise can be expected from the new unit.
  DO NOT OIL or Greeze the unit.. so not wash or hose the pumps ever.


• Cover pump when washing motor.