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Forced Induction Forum
Discuss supercharging, turbocharging and even nitrous and water injection here.

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Old 06-16-2016, 11:54 AM   #1
randomdude
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Turbo oil drain location on m54 oil pan

While I have my oil pan off for new gasket, baffle and pump upgrade, I was thinking of drilling, tapping and plugging the oil drain line for a future turbo build. Does anyone have the measurements/location of where this would go and thread pitch/hole size? This is an M54B30...
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Old 06-16-2016, 03:20 PM   #2
John E46
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Why don't you just tape from the oil line at the vanos solenoid
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Old 06-16-2016, 03:31 PM   #3
John E46
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Sorry tap*
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Old 06-16-2016, 03:40 PM   #4
daniel_f.
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Sorry tap*
He wants to manufacture the oil return, not the feed line.

You want the return as high as possible, Best would be to Tag the bottom-end as the fluid level in the oilpan is very high!
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Old 06-16-2016, 06:50 PM   #5
Mafik
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One of most popular location for oil drain. Only one comment, oil drain hose should be more straight to prevent accumilate oil in lower point of hose and simplify drain from turbo.

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Old 06-17-2016, 12:06 AM   #6
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One of most popular location for oil drain. Only one comment, oil drain hose should be more straight to prevent accumilate oil in lower point of hose and simplify drain from turbo.

yes, that drain should definitely be more straight than that. the actual fitting that goes on the pan should be at an angle facing a little upwards so that way the line doesn't have to curve at all.
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Old 06-17-2016, 04:14 AM   #7
mrbobmicjoe
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if youre running a top mount setup the location isnt as critical since you have gravity on your side, but regardless you want the drain to be as high up as possible. Ive seen people tap the oil pan and ive also seen some tap into the timing cover for an oil drain. Oil pan definitely seems like the easiest....
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Old 06-17-2016, 02:40 PM   #8
John E46
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He wants to manufacture the oil return, not the feed line.



You want the return as high as possible, Best would be to Tag the bottom-end as the fluid level in the oilpan is very high!

Ohh sorry I didn't realize that
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Old 06-23-2016, 12:00 AM   #9
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Thanks for all the input, I appreciate it!
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Old 06-27-2016, 03:59 PM   #10
Mafik
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Originally Posted by mrbobmicjoe View Post
if youre running a top mount setup the location isnt as critical since you have gravity on your side, but regardless you want the drain to be as high up as possible. Ive seen people tap the oil pan and ive also seen some tap into the timing cover for an oil drain. Oil pan definitely seems like the easiest....
You are right, for oil drain line only gravity is working, because turbo oil line don't have oil pressure, normal practice it's install restrictor in turbo oil feed line.
However, oil drain location is important for top mount setups also.
The idea to tap oil pan higher than oil level. In another case oil will stay in drain line which is definetely bad.
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Old 07-09-2016, 11:18 PM   #11
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I am against tapping into any existing components, I would build a separate oil circuit with oil intercooler for the turbo.

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Old 07-10-2016, 02:44 AM   #12
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I am against tapping into any existing components, I would build a separate oil circuit with oil intercooler for the turbo.

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seems extremely unnecessary
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Old 08-22-2016, 11:20 AM   #13
sda2
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So there are some people, who just drain the turbo into the oil drain plug, which makes sense to me, aslong as the turbo is above the oil level inside the pan.

The oillevel should just stay the same inside the pan and in the drain hose.

http://www.bimmerforums.com/forum/sh...rain-I-done-it

Any thought on this?
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