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.
- 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.
Air Pump Relief Valve Pressure
| Application | Pressure Psi (kg/cm2 ) | |
|---|---|---|
| Celica, Corona, Pickup | 3.3-5.5 (.23-.39) | |
| Corolla | 4.0-4.9 (.28-.35) | |
| Land Cruiser | ||
| Federal | 3.9-6.1 (.28-.43) | |
| Calif. | 5.7-8.5 (.40-.60) | |