Engine Compression
- Warm engine to normal operating temperature. Remove all spark plugs. Disconnect ignition coil primary wire connector.
- Hold throttle plate fully open. Crank engine, and note compression pressure.
COMPRESSION RATIO
| Application |
Specification |
| MX-3 |
| 1.6L |
9.4:1 |
| 1.8L |
9.2:1 |
| Protege |
| DOHC |
9.3:1 |
| SOHC |
| California |
9.3:1 |
| Federal |
9.0:1 |
| 323 |
| California |
9.3:1 |
| Federal |
9.0:1 |
COMPRESSION SPECIFICATIONS
| Application |
Minimum psi (kg/cm2
) @ RPM |
Standard psi (kg/cm2
) @ RPM |
| MX-3 |
| 1.6L |
135 (9.5) @ 300 |
192 (13.5) @ 300 |
| 1.8L |
142 (10.0) @ 300 |
198 (13.6) @ 300 |
| Protege |
| SOHC |
121 (8.5) @ 300 |
173 (12.2) @ 300 |
| DOHC |
128 (9.0) @ 300 |
182 (12.8) @ 300 |
| 323 |
135 (9.5) @ 300 |
192 (13.5) @ 300 |