F 350 4WD Pickup V8-351 5.8L VIN H EFI (1997)
Compression Check: Testing and Inspection
Gauge Check
1. Make sure oil in crankcase is of the correct viscosity and at proper level, and battery is properly charged. Operate vehicle until engine is at normal
operating temperature. Key off, then remove all spark plugs.
2. Set throttle plates in wide-open position.
3. Install a compression gauge such as Rotunda Compression Tester 014-00707 or equivalent in No.1 cylinder spark plug opening.
4. Install an auxiliary starter switch in starting circuit. With key off, and using auxiliary starter switch, crank engine at least five compression strokes
and record highest reading. Note the approximate number of compression strokes required to obtain the highest reading.
5. Repeat test on each cylinder, cranking the engine approximately the same number of compression strokes.
