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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 04-01-2013, 09:41 AM   #1
icecolde46
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Smile I love german engineering

yesterday, I tried to change the engine oil. But, I broke the oil drain plug. half of the screw was left in the oil pan screw hole.

I know that there is some tool kit using a left handed drill to bore a hole on the broken screw and then you can un-screw it using a chisel.

Just before I was trying to order the tool-kit, I noticed that the oil drain plug has already a hole in the center of it. God! the genius German engineers had already known that you would broke the screw, so they have already bored a hole for you.

Then I got the broken screw out of the oil pan easily with a chisel and with a smile on my face.

Last edited by icecolde46; 04-01-2013 at 09:43 AM.
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Old 04-01-2013, 10:11 AM   #2
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I don't know how so many people strip the oil bolt. Just get it in their hand tight and go from there.
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Old 04-01-2013, 10:15 AM   #3
icecolde46
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I used a wrench to tighten the screw and it brokes.


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I don't know how so many people strip the oil bolt. Just get it in their hand tight and go from there.
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Old 04-01-2013, 10:17 AM   #4
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Torque wrench! 18 ft/lbs
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Old 04-01-2013, 10:17 AM   #5
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You should get a torque wrench to prevent that from happening again.
^this
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Old 04-01-2013, 10:44 AM   #6
tock172
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Just replace the drain plug every few oil services.
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Old 04-01-2013, 11:19 AM   #7
WDE46
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You don't need a torque wrench for that if you know what you're doing. Just "tighten" it a bit. I don't know what else to say. There's no point in putting much muscle into it. It's not structural. It just holds a seal.
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Old 04-01-2013, 11:21 AM   #8
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You broke it putting it in? Bummer. All that fresh expensive oil going to waste. I don't know why the bolt is hollow. I assumed either to collect crap in the hollow - or to protect oil pan in case threads got seized. Never occurred to me it might be to break when inserting (assuming to again protect expensive oil pan threads). I think before I change my oil I'll buy a new drain plug. I'm not sure you should be thanking German engineering - since I don't know why they engineered it that way. It could be dumb luck.
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Old 04-01-2013, 11:55 AM   #9
Peter.turner
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You broke it putting it in? Bummer. All that fresh expensive oil going to waste.
i wasn't going to say anything, but i think you need to look at what you said, i don't put fresh oil in and then put the sump plug back in.
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Old 04-01-2013, 01:22 PM   #10
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Old 04-01-2013, 01:35 PM   #11
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If u love BMW engineering. You would love VW engineering even more
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Old 04-01-2013, 01:39 PM   #12
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The oil pan bolt is designed with a shear head to prevent stripping out the oil pan. The bolt torque is 18 ft lbs max.

The fault lies with the OP in not reading the BMW repair procedures prior to touching the car.

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Old 04-01-2013, 02:08 PM   #13
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Quote:
Originally Posted by WDE46 View Post
You don't need a torque wrench for that if you know what you're doing. Just "tighten" it a bit. I don't know what else to say. There's no point in putting much muscle into it. It's not structural. It just holds a seal.
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Old 04-01-2013, 02:25 PM   #14
Alex323Ci
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wow another oil fill plug broke thread. atleast you didn't need us to tell you how easy it is to remove if this happens.

btw it's designed to break before doing more damage to the real hard stuff to fix..the oil pan threads.
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Old 04-01-2013, 02:29 PM   #15
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Originally Posted by WDE46 View Post
You don't need a torque wrench for that if you know what you're doing. Just "tighten" it a bit. I don't know what else to say. There's no point in putting much muscle into it. It's not structural. It just holds a seal.
that's false. The feeling of tight to a 120lb weakling and a 220 lb bodybuilder is completely different.

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Old 04-01-2013, 02:37 PM   #16
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http://forum.e46fanatics.com/showthread.php?p=15231506

Another argument over this, really?
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Old 04-01-2013, 04:26 PM   #17
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that's false. The feeling of tight to a 120lb weakling and a 220 lb bodybuilder is completely different.
Yeah- use a 3/8" ratchet, not 1/2".
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Old 04-01-2013, 04:55 PM   #18
WDE46
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Oil plug is pretty much tight by holding the ratchet at or near the head and twisting with your forearm.

If you work on machines you will get a feel for it. I have no problem not stripping the tiniest screws on a laptop disassembly to the weakest or largest bolts on my e46. I just have a feel for when material starts to yield IDK.
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Old 04-01-2013, 05:58 PM   #19
HBizzo88
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Originally Posted by WDE46 View Post
Oil plug is pretty much tight by holding the ratchet at or near the head and twisting with your forearm.

If you work on machines you will get a feel for it. I have no problem not stripping the tiniest screws on a laptop disassembly to the weakest or largest bolts on my e46. I just have a feel for when material starts to yield IDK.
Op obviously doesn't have a "feel for it", so that's why we're advising him to use a torque wrench. Not break bolts till he finally gets it.
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Old 04-01-2013, 07:49 PM   #20
WDE46
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Originally Posted by HBizzo88 View Post
Op obviously doesn't have a "feel for it", so that's why we're advising him to use a torque wrench. Not break bolts till he finally gets it.
Aye agreed
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