14. Crankcase Pressure Test: Purpose:
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The purpose of this test is to measure the crankcase pressure. Crankcase pressure is a measure of how well the cylinders are sealing.
Crankcase Pressure Test - F-Super Duty
- Measure the pressure at the oil fill tube with 6.0L Crankcase Pressure Tester 303-758, with the engine at 70° C (158° F) minimum.
- Block the breather tube on the left valve cover.
- Measure with no load at 3, 000 RPM.
| Instrument | Specification | Measurement |
|---|---|---|
| 0-112 mm-Hg (0 to 60 H2 O) Magnehelic® gauge | Less than 15 mm-Hg (8 H2 O) |
If greater than 15 mm-Hg (8 H2 O), refer to the appropriate ENGINE article.