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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 03-01-2015, 09:20 AM
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energizedmortal energizedmortal is offline
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galled oil filter housing bolts

Using Cn90 diy... bolts 1, 2 and 6 are galled. Bolts 3, 4, and 5 are nice and tight and after driving for at least 30 minutes there is no leak yet but I know this needs to be done right.

What tools and heli coil kit will i need to correct this?

Post 54 here seems to be a success story thank you Jason:

http://www.bimmerforums.com/forum/sh...Stripped/page3

can I use the same method described by Jason or will I have to do something different since I have different bolts that galled?

Luckily all the oem bolts and the oil filter housing are fine. Was happy to see the updated torx freeze plugs that were dry at 183,000 miles. Took about 2 hours. The oil filter housing gasket and oil pipe were long gone. Thank you CN90 for the write up!
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  #2  
Old 03-01-2015, 10:25 AM
cn90 cn90 is online now
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If not leaking, why bother fixing it?
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  #3  
Old 03-01-2015, 10:51 AM
pleiades pleiades is offline
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Is working on this with the engine completely cooled down the only way to minimize the chances of galling when removing the bolts?

Energized, how far did you decide to torque these bolts after noticing the galling?
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  #4  
Old 03-01-2015, 03:08 PM
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energizedmortal energizedmortal is offline
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I may leave it if it doesn't leak until next time. Everything was tight before removal. After reassembly I tighten them all up then went to torque that's when I noticed 1,2 and 6 were not getting any tighter.

Last edited by energizedmortal; 03-02-2015 at 05:57 AM.
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  #5  
Old 03-01-2015, 03:26 PM
cn90 cn90 is online now
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I know this sounds odd, but the serpentine belt will put tension on the tensioner pulley, pulling the entire OFH toward the engine block. That is the design from factory.

So, even #1, 2, and 6 bolts are galled, the belt will keep the OFH up against the engine block.


I am attaching a random photo from the forum for reference purpose...


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  #6  
Old 03-02-2015, 06:02 AM
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energizedmortal energizedmortal is offline
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Quote:
Originally Posted by cn90 View Post
I know this sounds odd, but the serpentine belt will put tension on the tensioner pulley, pulling the entire OFH toward the engine block. That is the design from factory.

So, even #1, 2, and 6 bolts are galled, the belt will keep the OFH up against the engine block.


I am attaching a random photo from the forum for reference purpose...


Thanks for this Cn90. Your cooling rehaul DIY was very helpful. Did the cooling rehaul after the ofhg and luckily everything went well.
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  #7  
Old 05-20-2015, 05:47 AM
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energizedmortal energizedmortal is offline
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The OFHG is leaking. I'm going to do the same as post 54 :

http://www.bimmerforums.com/forum/sh...Stripped/page3

Wanted to confirm that 8.3 mm titanium drill bit is the correct size I will need to use to drill out the stripped bolt holes (1,2 6) on the block?

Also, if anyone has experience with this please give me some tips and what "not to do" when attempting this repair.

I plan to drill out the holes on the block, create new threads, install the inserts, torque OEM bolts to 16 ft-lbs.

Last edited by energizedmortal; 05-20-2015 at 06:33 AM.
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  #8  
Old 05-20-2015, 07:12 AM
cn90 cn90 is online now
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The galling issue: did it happen during removal of the bolts or during installation?

- Just follow Timesert trick by "Jason5driver" (bimmerforums).
- Place a rag, and cover the holes with cardboard/masking tape before drilling!
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  #9  
Old 05-20-2015, 07:16 AM
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energizedmortal energizedmortal is offline
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Quote:
Originally Posted by cn90 View Post
The galling issue: did it happen during removal of the bolts or during installation?

- Just follow Timesert trick by "Jason5driver" (bimmerforums).
- Place a rag, and cover the holes with cardboard/masking tape before drilling!
During removal. I drove the car before replacing the OFHG. Lesson learned will do all of this when the car is cold.
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  #10  
Old 05-20-2015, 09:10 AM
cn90 cn90 is online now
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I wonder if there is a way to prevent stripping of threads during removal.

How about spraying the 6 bolts with some PB Blaster etc. (where the OFH mates with the block), this way the lubricant gets down into the threads, reducing the chance of threads stripping from galling?
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