Compression Check

AllData Editors Note - Ford does not provide a cranking pressure specification, only an acceptable range.

Compression Pressure Limit Chart (Part 1 Of 2):

Compression Pressure Limit Chart (Part 2 Of 2):

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

If one or more cylinders reads low, squirt approximately one tablespoon of Super Premium SAE 5W30 Motor 0il, XO-5W30-QSP meeting Ford specification WSS-M2C153-G on top of the pistons in the low-reading cylinders. Repeat the compression pressure check on these cylinders.