Thread: Curiosity......
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Old 09-12-2007, 02:46 PM
Bill Kapaun's Avatar
Bill Kapaun Bill Kapaun is offline
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Join Date: Oct 2001
Location: Albany, Orygun
Posts: 825
Originally Posted by Louisianagames View Post
I'm with Ya on the wix filter. I use them In My boat twin GM 502's .
The valve is designed to let the oil bypass the contaminated filter when it gets full and keeps it from going back into the engine.
We have a tool to cut them open to see what might be getting destroyed inside the engine (different types of metal)

Take a peak //
Well, you are talking about the pressure bypass valve, not the ADBV. 2 different things!

So where does the oil go when the filter is full, if it doesn't go back to the engine?
Interestingly, GMC tends NOT to have a bypass valve in the filter, but usually uses them in the block instead!
NAPA Gold and CarQuest Premium are the SAME filter as the Wix, with a different paint job.
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