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.
Engine Compression
Check engine compression with engine at normal operating temperature at specified cranking speed, all spark plugs removed and throttle wide open.
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| Camry & Celica | 9.5:1 | |
| Corolla | 10.0:1 | |
| RAV4 & Tacoma | 9.5:1 | |
| Tercel | 9.4:1 | |
| T100 & 4Runner | 9.5:1 | |
| Normal Compression Pressure | ||
| Camry & Celica | 178 psi (12.5 kg/cm2 ) | |
| Corolla | 218 psi (15.3 kg/cm2 ) | |
| RAV4 & Tacoma | 178 psi (12.5 kg/cm2 ) | |
| Tercel | 185 psi (13.0 kg/cm2 ) | |
| T100 & 4Runner | 178 psi (12.5 kg/cm2 ) | |
| Minimum Compression Pressure | ||
| Camry & Celica | 142 psi (10.0 kg/cm2 ) | |
| Corolla | 145 psi (10.2 kg/cm2 ) | |
| RAV4 & Tacoma | 128 psi (9.0 kg/cm2 ) | |
| Tercel | 142 psi (10.0 kg/cm2 ) | |
| T100 & 4Runner | 128 psi (9.0 kg/cm2 ) | |
| Maximum Variation Between Cylinders | ||
| All Models | 14 psi (1.0 kg/cm2 ) | |
| Application | Specification | ||
|---|---|---|---|
| Compression Ratio | |||
| Supra | |||
| Non-Turbo | 10.5:1 | ||
| Turbo | 8.5:1 | ||
| Normal Compression Pressure | |||
| Supra | |||
| Non-Turbo | 192 psi (13.5 kg/cm2 ) | ||
| Turbo | 156 psi (10.9 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| Supra | |||
| Non-Turbo | 156 psi (10.9 kg/cm2 ) | ||
| Turbo | 128 psi (9.0 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | |||
| All Models | 14 psi (1.0 kg/cm2 ) | ||
| Application | Specification | |
|---|---|---|
| Compression Ratio | ||
| Avalon, Camry & Sienna | 10.5:1 | |
| Tacoma, T100 & 4Runner | 9.6:1 | |
| Normal Compression Pressure | ||
| Avalon, Camry & Sienna | 218 psi (15.3 kg/cm2 ) | |
| Tacoma, T100 & 4Runner | 174 psi (12.2 kg/cm2 ) | |
| Minimum Compression Pressure | ||
| All Models | 145 psi (10.1 kg/cm2 ) | |
| Maximum Variation Between Cylinders | ||
| All Models | 15 psi (1.1 kg/cm2 ) | |
| Application | Specification | |
|---|---|---|
| Land Cruiser & LX470 | ||
| Compression Ratio | 9.6:1 | |
| Normal Compression Pressure | 192 psi (13.5 kg/cm2 ) | |
| Minimum Compression Pressure | 142 psi (10.0 kg/cm2 ) | |
| Maximum Variation Between Cylinders | 14 psi (1.0 kg/cm2 ) | |
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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