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Old 11-10-2022, 11:07 PM   #1
Marvelous3
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Default Turbo oil return pipe size

Running some new hose on the red wagon as i shove this holset into it. I’m going to need to redo the oil drain from the turbo to the block. Can i get by with 3/8” internal diameter hose or do i need something bigger? Thinking 3/8 should be fine.
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Old 11-10-2022, 11:12 PM   #2
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Quote:
Originally Posted by Marvelous3 View Post
Running some new hose on the red wagon as i shove this holset into it. I’m going to need to redo the oil drain from the turbo to the block. Can i get by with 3/8” internal diameter hose or do i need something bigger? Thinking 3/8 should be fine.
I'd assume but mine is 1/2" Id on a gt3582 and it seems fine

Actually mine is -10an whatever that is
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Old 11-11-2022, 06:53 AM   #3
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3/8” DRAIN? That’s -6… no, absolutely not. That should be your FEED size for a journal bearing holset. I’d run a -12 drain (3/4”), some Holsets can get away with -10 (5/8”)
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Old 11-13-2022, 10:57 PM   #4
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5/8 is the standard. http://www.atpturbo.com/mm5/merchant...egory_Code=OIL
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Old 11-14-2022, 09:42 AM   #5
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My holset is buried in the shed but I think the actual drain orifice on the frame is 19mm, which is why people use -12 on holsets. Check your turbo, and check whatever adapter/flange you put on it.

There is no such thing as too big… there is certainly too small. Use your 3/8” to feed it
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Old 11-14-2022, 08:00 PM   #6
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My holset is buried in the shed but I think the actual drain orifice on the frame is 19mm, which is why people use -12 on holsets. Check your turbo, and check whatever adapter/flange you put on it.

There is no such thing as too big… there is certainly too small. Use your 3/8” to feed it
Mine has a 10an male fitting on it. It seems like such a big size but if it came from holset to cummins with a 1/2” drain then i might as well.
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