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.
1986 Mercury Sable L4-153 2.5L HSCFACTORY OEM SERVICE PROCEDURE
System Specifications
| Bore | 3.7 Inch (in) |
| Stroke | 3.3 Inch (in) |
| Compression Ratio | 9 |
| Horsepower @ RPM | 86 at 4000 Horsepower At RPM (hp @ rpm) |
| Torque @ RPM | 124 at 2800 Pound Foot At RPM (ft.lb @ rpm) |
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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