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
Disconnect wire at stop valve on injection pump. Remove vacuum pump and pump plunger. Clean fuel delivery pipes, remove pipes, and plug all openings. Remove injectors and heat shields. Place heat shield back in injector opening, followed by compression tester adapter 5191. Connect compression tester and test compression.
| Application | Specification |
|---|---|
| Compression Ratio | 23.0:1 |
| Normal Compression Pressure | 455 psi (32 kg/cm2 ) |
| Minimum Pressure | 341 psi (24 kg/cm2 ) |
| Maximum Variation Between Cylinders | 114 psi (8 kg/cm2 ) |
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.