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.
1990 Volkswagen Cabriolet Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Compression
COMPRESSION SPECIFICATION
| Application | psi (kg/cm2 ) | Compression Ratio |
|---|---|---|
| Cabriolet | 131-174 (9.0-12.0) | 8.5:1 |
| Corrado | 116-174 (8.0-12.0) | 8.0:1 |
| Fox | 131-174 (9.0-12.0) | 9.0:1 |
| Golf GL/GTI | 131-174 (9.0-12.0) | 10.0:1 |
| Jetta | 131-174 (9.0-12.0) | 10.0:1 |
| Jetta GLi | 145-190 (10.0-13.0) | 10.0:1 |
| Vanagon | 145-190 (10.0-13.0) | 9.0:1 |
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.
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