F 450 2WD Super Duty V10-6.8L VIN S (1999)
Compression Check: Specifications
Compression Pressure Limit Chart (Part 1 Of 2)
Compression Pressure Limit Chart (Part 2 Of 2)
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.