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Old 03-30-2019, 11:00 PM
JWYer JWYer is offline
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F30 Stripped Oil Drain Plug

Last week, I changed my F30 328i xDrive's engine oil. When I put the oil drain plug in, I over tightened and stripped it. (I believe the oil pan is stripped, because steel bot on aluminum pan.) A little oil was constantly dripping from it for a week. I was going to tap the oil pan one size bigger today. I spent some time trying to pull and turn the drain plug out with a vice grip, but the plug just spin freely in place. I couldn't pull on it hard since I was laying down in a tight space. I consider drilling the bolt out, but drilling in the tight space under the car sucks, and metal chips will get into the pan. I try to avoid removing the pan if I can. Here are a few questions:

1. What do you think is the easiest way to remove the free spinning drain plug?
1. How easy/complicated is it to remove the oil pan?
2. When does the low engine oil warning come up? (The car has been dripping oil slowly for a week and still showing max oil every time I measured it.)

I appreciate any comment.
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Old 03-31-2019, 12:57 AM
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dkreidel dkreidel is online now
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Here's what I'd do:

Get a helper to put pressure under the plug 180* apart with 2 sharp screwdrivers or knives while you turn the drain bolt CCW

Let the oil drain, and the install a helicoil or tapsert in the pan ... same thread as OE! Are you certain the pan is aluminum or magnesium and not plastic like Ryton?

Get a new drain plug and reinstall with a torque wrench
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Last edited by dkreidel; 03-31-2019 at 01:01 AM.
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Old 03-31-2019, 03:48 AM
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Doug Huffman Doug Huffman is offline
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Once the drain plug is leak tight then consider evacuating the oil from the topside with a vacuum pump. VW's have notoriously fragile oil pans and after the first time I never again loosened the plug, always sucked the oil out the dipstick tube.
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Old 03-31-2019, 07:41 AM
Michael Schott Michael Schott is offline
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Quote:
Originally Posted by Doug Huffman View Post
Once the drain plug is leak tight then consider evacuating the oil from the topside with a vacuum pump. VW's have notoriously fragile oil pans and after the first time I never again loosened the plug, always sucked the oil out the dipstick tube.
Where do you get your information that VWs have fragile oil pans? Thats a very broad statement.
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Old 03-31-2019, 07:56 AM
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Quote:
Originally Posted by Doug Huffman View Post
Once the drain plug is leak tight then consider evacuating the oil from the topside with a vacuum pump. VW's have notoriously fragile oil pans and after the first time I never again loosened the plug, always sucked the oil out the dipstick tube.
How do you suction from the top without a dipstick tube?
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Old 03-31-2019, 08:14 AM
JWYer JWYer is offline
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Quote:
Originally Posted by dkreidel View Post
Here's what I'd do:

Get a helper to put pressure under the plug 180* apart with 2 sharp screwdrivers or knives while you turn the drain bolt CCW

Let the oil drain, and the install a helicoil or tapsert in the pan ... same thread as OE! Are you certain the pan is aluminum or magnesium and not plastic like Ryton?

Get a new drain plug and reinstall with a torque wrench

I looked up parts online, 2016 328i xdrive has aluminum pan.
They are lots of covers under the car. The cutout on the cover for drain plug is small, which makes it hard to pry. I wish the car can be lift up higher so I don't have to crawl under it. Getting the plug out is a nightmare. Once the plug is removed, I can tap it.
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Old 03-31-2019, 08:18 AM
JWYer JWYer is offline
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Quote:
Originally Posted by chiefneil View Post
How do you suction from the top without a dipstick tube?
The only place I am thinking is the oil cap. However that doesn't provide a straight path to the bottom of the oil pan, I doubt that would work.
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