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With a tool called a slack tube manometer.

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14y ago

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Where is the crankcase pressure sensor on a cummins isx engine?

In crankcase filter box


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What can cause excessive crankcase pressure?

Excessive crankcase pressure can be caused by several factors, including worn or damaged piston rings, which allow combustion gases to escape into the crankcase. Blocked or malfunctioning positive crankcase ventilation (PCV) systems can also lead to pressure buildup. Additionally, oil leaks and excessive oil levels can contribute to increased pressure. Overheating or engine wear can exacerbate these issues, leading to further complications.


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1. The crankcase breather may be plugged. or---- 2. Too much crankcase pressure. There is too much blowby (combustion gasses leaking by the rings or piston), causing excessive pressure in the crankcase. To repair this, you will need to re-ring or bore out the engine with new pistons and rings.


What does a crankcase breather do?

The PCV or positive crankcase ventlation valve does as it is named. It will remove harmful gases from the engine. Also, you can find breather caps on the valve covers, this also helps to remove and fumes from the crankcase or engine base.


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If the rings are completely worn out they can put more preasure in the crankcase than the pcv can handle. Have it checked out.


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