Compression Pressure Limit Chart

Fig 1: Engine Compression Pressure Limit Chart (1 Of 2)

Courtesy of FORD MOTOR CO.

Fig 2: Engine Compression Pressure Limit Chart (2 Of 2)

Courtesy 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.