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 Test
Check compression with engine warm, all spark plugs removed and throttle wide open. Ground coil wire from center of distributor cap to engine block. Disconnect one end of duct between airflow sensor and throttle body to disable fuel injection system. Crank engine through at least 6 compression strokes per cylinder to determine engine compression.
| Model/ Application | Standard psi (kg/cm2 ) | Minimum psi (kg/cm2 ) |
|---|---|---|
| Cabriolet | 131-174 (9.0-12.0) | 109 (7.7) |
| Fox | 131-174 (9.0-12.0) | 102 (7.0) |
| Golf & Jetta | 131-174 (9.0-12.0) | 102 (7.0) |
| Golf GT | 145-189 (10.2-13.2) | 109 (7.7) |
| GTI | 131-174 (9.0-12.0) | 109 (7.7) |
| Vanagon | 87-131 (6.1-9.2) | 73 (5.2) |
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.
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