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Engine Compression

COMPRESSION SPECIFICATIONS

Application

Specification

Compression Ratio

2.5L Non-Turbo

8.9:1

2.5L Turbo

7.8:1

3.0L

8.85:1

3.3L

8.9:1

3.9L

9.0:1

5.2L

9.0:1

5.9L

8.1:1

Compression Pressure

3.0L

⁽¹⁾ 178 psi (12.5 kg/cm² )

All Other Engines

⁽²⁾ 100 psi (7.0 kg/cm² )

⁽¹⁾	At 250 RPM.

⁽²⁾	Minimum compression pressure is given. Maximum difference between each cylinder should not exceed 25 percent.