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Home >> Ford >> 2004 >> Explorer 4.0 E, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Engine System-General Information) >> Diagnosis And Testing >> Engine >> Compression Test - Compression Gauge Check >> Compression Pressure Limit Chart
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Compression Pressure Limit Chart

WARNING: This page is about a different car, the 2003 Mercury Mountaineer and 2003 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Engine Compression Pressure Limit Chart (1 Of 2)
G01272092Courtesy of FORD MOTOR CO.
Fig 2: Engine Compression Pressure Limit Chart (2 Of 2)
G01272093Courtesy of FORD MOTOR CO.

If one or more cylinders reads low, squirt approximately one tablespoon of engine oil on top of the pistons in the low-reading cylinders. Repeat the compression pressure check on these cylinders.