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Home >> Ford >> 2003 >> Taurus SE, 4D Sedan, 3.0 U, AX4S >> Repair and Diagnosis >> Engine Mechanical >> Mechanical >> Engine System-General Information >> Diagnosis And Testing >> Engine >> Component Tests >> Compression Test-Compression Gauge Check >> Compression Test-Test Results
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Compression Test-Test Results

The indicated compression pressures are considered within specification if the lowest reading cylinder is at least 75 percent of the highest reading. Refer to the Compression Pressure Limit Charts.

Fig 1: Compression Pressure Limit Chart (1 Of 2)
G01690724Courtesy of FORD MOTOR CO.
Fig 2: Compression Pressure Limit Chart (2 Of 2)
G01690725Courtesy 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.

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