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 Subaru RX AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Compression
COMPRESSION SPECIFICATIONS
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| Turbo | 7.7:1 | |
| Non-Turbo | 9.5:1 | |
| Normal Compression Pressure | ||
| Turbo | 145 psi (10.2 kg/cm2 ) | |
| Non-Turbo | 168 psi (11.8 kg/cm2 ) | |
| Minimum Compression Pressure | ||
| Turbo | 117 psi (8.2 kg/cm2 ) | |
| Non-Turbo | 139 psi (9.8 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.