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.
Compression (All Models)
Warm engine to normal operating temperature before checking the compression. Ensure battery is fully charged. Remove ignition coils. See IGNITION COIL under IGNITION SYSTEMS in REMOVAL, OVERHAUL & INSTALLATION - V6 & V8 article. Remove spark plugs. On Camry and Highlander, manufacturer states to disconnect electrical connectors at fuel injectors. On all models, using compression gauge, check compression with throttle fully open. Read compression in a short a time as possible. Ensure compression is within specification. See COMPRESSION SPECIFICATIONS table. Install and tighten spark plugs to 13 ft. lbs. (18 N.m). Reinstall ignition coils.
| Application | Specification | ||
|---|---|---|---|
| Normal Compression Pressure | |||
| V6 Models | |||
| Avalon | 218 psi (15.3 kg/cm2 ) | ||
| Camry | 213 psi (15.0 kg/cm2 ) | ||
| Camry Solara | 218 psi (15.3 kg/cm2 ) | ||
| Highlander | 213 psi (15.0 kg/cm2 ) | ||
| Sienna | 218 psi (15.3 kg/cm2 ) | ||
| Tacoma, Tundra & 4Runner | 174 psi (12.2 kg/cm2 ) | ||
| V8 Models | |||
| Land Cruiser, Sequoia & Tundra | 192 psi (13.5 kg/cm2 ) | ||
| Minimum Compression Pressure | |||
| V6 Models | |||
| Avalon | 145 psi (10.1 kg/cm2 ) | ||
| Camry | 142 psi (10.0 kg/cm2 ) | ||
| Camry Solara | 145 psi (10.1 kg/cm2 ) | ||
| Highlander | 142 psi (10.0 kg/cm2 ) | ||
| Sienna, Tacoma, Tundra & 4Runner | 145 psi (10.1 kg/cm2 ) | ||
| V8 Models | |||
| Land Cruiser, Sequoia & Tundra | 142 psi (10.0 kg/cm2 ) | ||
| Maximum Variation Between Cylinders | |||
| All Models | 14 psi (1.0 kg/cm2 ) | ||
NO RELATED
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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.