Duramax Diesels Forum Truck of the Week
Old 08-17-2018, 01:38 PM
NC-smokinlmm's Avatar
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I believe it's associated with pop off pressure of bypass, the filter volume and media will change it...
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Old 08-17-2018, 08:41 PM
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The bypass is on the pass side in the other oil galley. Won’t be affect by oil filter type
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Old 08-17-2018, 11:01 PM
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Some filters have a pressure bypass built in. But doubt that's issue. Sounds like a drain back, try a different filter.
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Old 08-17-2018, 11:27 PM
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Filter that was on the truck was a Rotella, looks like the holes in it are much larger and oval compared to the circular ones of the new GM filter. Post oil change the oil pressure was about 10psi higher. Going to see how it starts in the morning and see if I get any change. I kept a sample of the oil ill send out to see if there is any metal in it and go from there. Ill post a picture of all the filters later on Saturday.
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