Joined: Jun 2015

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Hey guys, I had a rebuild done on basically EVERYTHING this time last year...build has about 40k on it...i have noticed for about a month that my truck leaves a few oil spots of oil on the floor every morning. I am fairly modded and run between 40-50lbs of boost and am trying to determine if its just a typical 5.9 leak or if I have a problem.
I do not have oil in my coolant and no fuel in my oil. I hve tested blowby throughout the rpm range and hot or cold get nothing but a slowly rotating oil cap. No pressure or smoke. The truck runs Rotella T6 full syn and JUST did a oil change this week.
Now i tried a different kind of blowby test where i brake boosted to 10psi and check for motion and the cap raises up but did not fall out when I got above 7psi....should I expect this to be normal as the valvtrain needs pressure to move oil around?
I have recently cleaned the ccv and breather tibe but not the drainback tube yet...so i might do that still. Truck runs great great mileage and is not burning oil or leaking enough to put drops on my tailgate.

Joined: Jun 2015

Posts: 13

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Joined: Mar 2007

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From: Calgary, Alberta, Canada

Joined: Jun 2015

Posts: 13

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The breather tube. A single drop or so after it sits.

Joined: Mar 2007

Posts: 1,245

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From: Calgary, Alberta, Canada

Joined: Jun 2015

Posts: 13

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At 150k yes normal...but not at 40k on a new motor hence my worry...

Joined: Jun 2015

Posts: 13

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