LEMON Manuals: Even more car manuals for everyone
Home >> Pontiac >> 1965 >> GTO Eng CD WS, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Mechanical Fuel Pumps >> Testing Vacuum Pump >> High Oil Consumption

High Oil Consumption

NOTE: Piston type vacuum pumps require some oil for piston and cylinder wall lubrication and oil traces do not indicate a defective pump. Sudden increase in oil consumption may indicate a defective pump.

To test for excessive oil consumption, install a 2" glass blown type fuel filter (with filter element removed) in vacuum pump outlet line. An accumulation of 1/4" of oil in the bowl after 25 miles of operation indicates a defective pump.

scientia non olet · About LEMON Manuals