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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 10-07-2010, 12:18 PM
Faustusdr Faustusdr is offline
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Mein Auto: 1998 528i
Oil Plug 0n E39 1998

LAST OIL CHANGE, THE OIL PLUG SHEARED OFF. PART OF IT IS STILL THERE. PUT ON A NOTHER PIN THAT IS NOT TIGHT ALL THE WAY BECAUSE OF OLD PART THAT IS STILL STUCK THERE. ANY SUGGESTIONS? ITS NOT LEAKING OIL OR LOSING PRESSURE
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  #2  
Old 10-07-2010, 12:35 PM
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dalekressin dalekressin is offline
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I believe this has been discussed on this board. While you await words of wisdom from the wisest; do a database search.
Sorry for the problem, I'd be upset as well.
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  #3  
Old 10-07-2010, 06:23 PM
Faustusdr Faustusdr is offline
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well I cant find it. How worried should I be worried?
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  #4  
Old 10-07-2010, 07:54 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
Join Date: Mar 2008
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Faustusdr View Post
well I cant find it. How worried should I be worried?
Next time, keep an extra bolt handy BEFORE you change your oil... they shear off verrrry easily (ask me how I know).

The place to look is the bestlinks thread where you'll see this:
- Cn90 How to change your oil; and Bluebee how NOT to change your oil!

Here's PLAN A from that how NOT to change your oil thread ...

Good news for you, the fix is usually quite simple and inexpensive:
- Buy a new BMW oil drain bolt at the dealership (part number in that how-not thread)
- Make sure you get a new copper washer as the old one is probably toast from torquing too much (mine was)
- If the original was a BMW oil pan bolt, it's hollow (so you get to skip a step)
- If the original was a solid bolt, then you'll need to drill a hole in the centerline (see screw extractor instructions for the size)
- Twist a screw extractor clockwise into that center hole in the bolt (the exact size is in the how-not thread)
- Turn the screw extractor counterclockwise (with the bolt) out by hand; it turns easily and you'll breath a sigh of relief
- Match up the top half with the bottom half; it should be the same size as the new bolt (mine was); that way you know nothing is left in the oil pan (if anything is in the oil pan, you'll need plan B)
- Screw the new bolt (with new washer) in, hand tight with a socket! No torque wrench!

Or use the MightyVac down the dipstick tube. Do not use the Motive oil extractor (ask me how I know):

Plan B: If it's the V8, removing the oil pan isn't bad; if it's the I6, you don't really want to remove the oil pan so let's hope Plan A works just fine for you.


Last edited by bluebee; 10-07-2010 at 07:59 PM.
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  #5  
Old 10-07-2010, 08:03 PM
cn90 cn90 is offline
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Get a flat screw driver and unscrew the broken hollow stud (Yes BMW drain plug has hollow stud).

Last edited by cn90; 10-07-2010 at 09:00 PM.
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  #6  
Old 10-07-2010, 08:16 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by cn90 View Post
Get a flat screw driver and unscrew th broken hollow stud (Yes BMW drain plug has hollow stud).
If the OP follows cn90's nice McGyver-like screwdriver recommendation, bear in mind cn90 also kindly measured the diameter of the bolt centerline hole to be 6mm in diameter.

However, don't do what I did. Do not accidentally screw the sheared bolt further in the oil pan drain hole! (If it goes too deeply, it will fall inside the pan and you really don't want that to happen, especially if you have the I6.)

Since the OP can driver the bimmer now (with the second bolt plugging the hole), I'd suggest an EX-4 tap screw extractor as the less exciting but more elegant solution.


Last edited by bluebee; 10-07-2010 at 08:22 PM.
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  #7  
Old 10-07-2010, 09:34 PM
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bluebee bluebee is offline
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Location: San Jose, California
 
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Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Faustusdr View Post
well I cant find it.
Interestingly, I simply bimmergoogled for "broken oil drain bolt" and the like, and came up with the following which provide a bevy of (somewhat novel) solutions.

Someone broke their oil drain plug today and he couldn't find any references on the topic, so I search for him (and found these which I'll post here as a cross reference).

Here is the search result for broken oil pan drain bolts:
- How not to change your oil in your E39 (stripped drain plug)
- Broke the plug....
- Oil Plug Stripped! Now What ??
- URGENT: engine oil drain plug broke
- Broken oil plug & Broken oil plug!
- I Literally Want to Cry....
- Broken Oil Plug 0n E39 1998
- Magnetic oil drain bolt broke in half

Here is the search result for stripped oil pan threads:
- Drain plug / oil pan stripped on 2.8 Z3
- oil plug bad
- '92 325i-- oil drail plug stripped HEEEELP!
- Oil pan stripped (use level sensor as a drain plug)
- Oil pan stripped (weld plate over hole)

Here is a good cn90 DIY on changing your oil the gravity feed way:
- DIY: E39 Changing engine oil made simple

And, read this BEFORE you select a vacuum extractor:
- DIY - BMW E39 Oil & Filter Change (vacuum extraction method)
- Why I don't recommend the Motive Vacuum Oil Extractor ...

Note the bevy of potential solutions:
- Use a 6mm wide screwdriver to spin the broken half out
- Use an EX-4 screw extractor (aka easy out) to spin the broken half out <-- recommended
- Reverse drill the steel broken half out of the aluminum oil pan
- Retap the stripped threads in the aluminum oil pan (but generally the bolt breaks before the threads strip)
- Wrap teflon tape on the threads of a new bolt and screw it in abutting the broken bolt half
- Heli-coil the stripped threads in the aluminum oil pan
- Drop the E39 V8 il pan to access the bolt if it fell through (dropping the E39 I6 oil pan is a nightmare)
- Weld over the hole and use the MightyVac oil extractor from the dipstick forever more
- Weld over the hole and use the oil level sensor as the drain plug instead
- Access the broken bolt inside the oil pan through the leveling sensor opening
- Buy an aftermarket oil drain bolt (e.g., EAS Tuning magnetic, or ?)

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