B3000 SE Regular Cab 2WD V6-3.0L OHV (2002)
Compression Check: Testing and Inspection
Compression Test - Interpreting Compression Readings
Compression Test - Interpreting Compression Readings
1. If compression improves considerably, piston rings require service.
2. If compression does not improve, valves are sticking or seating improperly.
3. If two adjacent cylinders indicate low compression pressures and squirting oil on piston does not increase compression, the head gasket may be
leaking between cylinders. Engine oil and/or coolant in the cylinders could result from this condition. Use the Compression Pressure Limit Chart
when comparing cylinder compression readings to determine if the lowest reading is at least 75 percent of the highest reading.
