Pump And Relief Valve

Check air pump belt for condition and tension. Belt tension should be 60-100 lbs. with a used belt and 100-150 lbs. with a new belt. Do not pry on pump housing when tightening belt.

Air Pump Relief Valve Pressure

Application	Pressure Psi (kg/cm² )
Celica, Corona, Pickup	5.0-6.4 (.35-.44)
Corolla	4.7-6.8 (.33-.48)
Land Cruiser	5.7-8.5 (.40-.60)
Tercel	3.3-5.6 (.23-.39)

Disconnect air outlet hose at check valve and install pressure gauge. Start engine, warm to operating temperature, and raise engine speed until relief valve operates. Check that pressure is correct.