Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1989 Mazda 626 BaseFACTORY OEM SERVICE PROCEDURE
Engine Compression
COMPRESSION SPECIFICATIONS
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| B2200 | 8.6:1 | ||
| B2600i & MPV | 8.4:1 | ||
| MX-6 & 626 | |||
| Non-Turbo | 8.6:1 | ||
| Turbo | 7.8:1 | ||
| 323 | |||
| Non-Turbo | 9.3:1 | ||
| Turbo | 7.9:1 | ||
| Normal Compression Pressure | |||
| B2200 | 173 psi (12.2 kg/cm2 ) | ||
| B2600i & MPV | 185 psi (13.0 kg/cm2 ) | ||
| MX-6 & 626 | |||
| Non-Turbo | 162 psi (11.4 kg/cm2 ) | ||
| Turbo | 139 psi (9.8 kg/cm2 ) | ||
| 323 | |||
| Non-Turbo | 192 psi (13.5 kg/cm2 ) | ||
| Turbo | 156 psi (11.0 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| B2200 | 121 psi (8.5 kg/cm2 ) | ||
| B2600i & MPV | 119 psi (8.4 kg/cm2 ) | ||
| MX-6 & 626 | |||
| Non-Turbo | 114 psi (8.0 kg/cm2 ) | ||
| Turbo | 98 psi (6.9 kg/cm2 ) | ||
| 323 | |||
| Non-Turbo | 135 psi (9.5 kg/cm2 ) | ||
| Turbo | 109 psi (7.7 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | 28 psi (2.0 kg/cm2 ) | ||
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.