Oil Pump: Inspection
Measure outer gear-to-crescent clearance. Measure outer gear-to-housing clearance. Using a straightedge and feeler gauge, measure clearance between gears and pump cover. Measure lock-up control valve spring free length. Replace components if not within specification. See the OIL PUMP SPECIFICATIONS table.
OIL PUMP SPECIFICATIONS
| Application | In. (mm) | |
|---|---|---|
| Outer Gear-To-Crescent Clearance | ||
| Standard | .006-.008 (.14-.20) | |
| Limit | .010 (.25) | |
| Outer Gear-To-Housing Clearance | ||
| Standard | .002-.008 (.05-.20) | |
| Limit | .010 (.25) | |
| Oil Pump Gear-To-Cover Clearance | ||
| Standard | .001-.002 (.02-.04) | |
| Limit | .003 (.07) | |
| Lock-up Control Valve Spring Free Length | ||
| Miata & MPV | .984 (25.00) | |
| RX7 & 929 | 1.012 (25.70) | |