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Re: Cummins L9 & B6.7 Blow By
Posted to Tool & Equipment Forum on 6/17/2025 2 Replies

There is a Cummins tool. Using a water manometer. But I generally use a snap on tool hooked to multimeter and through dipstick tube. First I just change the breather element and that usually solves it. 30,000 mile intervals unless the mileage and engine hours ... Login to read more.

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