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E36 /7 Z3 (1996-2002)
E36/7 Z3 roadster and coupe talk with our gurus here.

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  #1  
Old 08-03-2008, 03:12 PM
dieselino dieselino is offline
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Z4: Expanding rivets to remove bumper anyone know how these work?

They were very easy to remove, I just pushed the center rivet in just like posted in this thread http://www.zpost.com/forums/showthread.php?t=79994 but I know have no idea how these work to reuse them. I see I can push the pin back in but that would only work if I had access to the back side of the bumper. But once the bumper is in place I dont see how I can get these back on. Any info?
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  #2  
Old 08-03-2008, 03:50 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by dieselino View Post
They were very easy to remove, I just pushed the center rivet in just like posted in this thread http://www.zpost.com/forums/showthread.php?t=79994 but I know have no idea how these work to reuse them. I see I can push the pin back in but that would only work if I had access to the back side of the bumper. But once the bumper is in place I dont see how I can get these back on. Any info?
Goes in from the front of the rivet.
Push in the base and then the center piece.
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  #3  
Old 08-03-2008, 03:56 PM
dieselino dieselino is offline
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But when you remove them the pin goes in from the back of the rivet and has a head on it like a nail. So do you have to put the pin in backwards? I hope I am making sense.
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  #4  
Old 08-03-2008, 04:13 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by dieselino View Post
But when you remove them the pin goes in from the back of the rivet and has a head on it like a nail. So do you have to put the pin in backwards? I hope I am making sense.
See pic. front and rear bumper rivets.
Front on center piece pushes in. Nail comes out from the rivet from the front.

Last edited by Ron Stygar; 08-03-2008 at 06:38 PM. Reason: Removed incorrect pic
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  #5  
Old 08-03-2008, 04:22 PM
dieselino dieselino is offline
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Mine dont look like either of those. Those make sense! Here is two pics of the rivets. The pic with the pin inside the rivet is how they came out.
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  #6  
Old 08-03-2008, 04:27 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by dieselino View Post
Mine dont look like either of those. Those make sense! Here is two pics of the rivets. The pic with the pin inside the rivet is how they came out.
Never saw that rivet.
Which bumper? Front or rear?
Where did it come from on the bumper?
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  #7  
Old 08-03-2008, 04:34 PM
dieselino dieselino is offline
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Front bumper on an 06 m coupe, they are the rivets inside the wheel well holding the wheel liner inplace to the bumper.
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  #8  
Old 08-03-2008, 04:53 PM
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Originally Posted by dieselino View Post
Front bumper on an 06 m coupe, they are the rivets inside the wheel well holding the wheel liner inplace to the bumper.
The four on each side on the edge are the one in my pic. Is that the ones?

The ones you have look like pop rivets which would have to be replaced.
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  #9  
Old 08-03-2008, 05:00 PM
dieselino dieselino is offline
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Yes these are the same. Do you have a part number for the replacement ones for the front? I really dont see how I can reuse these if I cant access them front behind the bumper.
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  #10  
Old 08-03-2008, 06:32 PM
dieselino dieselino is offline
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Upon closer inspection these rivets are meant for a one time use. Looking at the end of the pin it is visible that there was another peice attached to the pin that was broken off. This would make sense how they work, the pin would be pulled through from the outside then broken off when done.

I ended up drilling a small hole all the way through the pin that way I can put a finishing nail through the hole to pull it through. Only problem now is I dont know how I will get the nails out. I can push them into the bumper but Im no sure if I can remove the skid plate to get them out.
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  #11  
Old 08-03-2008, 06:33 PM
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Quote:
Originally Posted by dieselino View Post
Yes these are the same. Do you have a part number for the replacement ones for the front? I really dont see how I can reuse these if I cant access them front behind the bumper.
The first pic was incorrect.
Confusion was that it shows at group 51 but doesn't show the correct rivets.
Turns out it's under group 41.
Did someone remove your bumper before, that didn't have the right parts? Could have been from assembly.
The part you have is a pop rivet as suspected.
There is one on each side on the wheelwell at the bottom 9 inches in from the fender.



Item 10
http://www.realoem.com/bmw/showparts...51&hg=41&fg=10

Item 27
http://www.realoem.com/bmw/showparts...08&hg=41&fg=25
.
.
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Last edited by Ron Stygar; 08-03-2008 at 06:41 PM.
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  #12  
Old 08-03-2008, 06:36 PM
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Quote:
Originally Posted by dieselino View Post
Upon closer inspection these rivets are meant for a one time use. Looking at the end of the pin it is visible that there was another peice attached to the pin that was broken off. This would make sense how they work, the pin would be pulled through from the outside then broken off when done.

I ended up drilling a small hole all the way through the pin that way I can put a finishing nail through the hole to pull it through. Only problem now is I dont know how I will get the nails out. I can push them into the bumper but Im no sure if I can remove the skid plate to get them out.
It's the wrong part. See post #11.
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  #13  
Old 08-03-2008, 08:17 PM
RobMCoupe RobMCoupe is offline
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Quote:
Originally Posted by Ron Stygar View Post
It's the wrong part. See post #11.
I am glad the thread came up. I've been looking for the part number for the pop rivet because my front right bumper was torn from the support bracket and fender liner. Ordered the part from dealer and they got the ezpanding rivet like the front on post #11. The dealer been looking for the it and haven't call me back. It's been a few weeks so I will give them a call tomorrow.
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  #14  
Old 08-03-2008, 08:25 PM
blau335 blau335 is offline
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One time use only and they are almost or more than a dollar each depending on where you get them. Very lame. I'll probably convert mine to the standard 8mm screws
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  #15  
Old 08-03-2008, 08:35 PM
RobMCoupe RobMCoupe is offline
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Originally Posted by blau335 View Post
One time use only and they are almost or more than a dollar each depending on where you get them. Very lame. I'll probably convert mine to the standard 8mm screws
I already ordered and paid for them. Dealer called me to pcikup the parts a couple weeks back and I noticed they are not the same. Can you post pics of your conversion?
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  #16  
Old 08-03-2008, 08:38 PM
blau335 blau335 is offline
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Originally Posted by RobMCoupe View Post
I already ordered and paid for them. Dealer called me to pcikup the parts a couple weeks back and I noticed they are not the same. Can you post pics of your conversion?
Haven't done it yet. But the basic principle is to use those metal pieces that 90% of the rest of the things screw into and clip it onto the holes. Might need a larger washer on the standard 8mm screws to hold.
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  #17  
Old 08-03-2008, 08:40 PM
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Originally Posted by RobMCoupe View Post
I already ordered and paid for them. Dealer called me to pcikup the parts a couple weeks back and I noticed they are not the same. ?
You normally don't remove the pop rivet. If you do, you can replace it with the reuseable front one.
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  #18  
Old 08-03-2008, 09:39 PM
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jmillet jmillet is offline
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Clever pop rivet

My 2007 Z4MC uses P/N 07 14 7 172 274 pop rivet ( four on each side) to affix the front fender liner to the bumper cover.
You punch the center pin in to remove and replace with a new rivet. You insert the new rivet and pull the center pin out as far as it will go and then cut off the excess pin shaft.
Not intuitively obvious
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  #19  
Old 08-04-2008, 05:49 AM
dieselino dieselino is offline
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Quote:
Originally Posted by jmillet View Post
My 2007 Z4MC uses P/N 07 14 7 172 274 pop rivet ( four on each side) to affix the front fender liner to the bumper cover.
You punch the center pin in to remove and replace with a new rivet. You insert the new rivet and pull the center pin out as far as it will go and then cut off the excess pin shaft.
Not intuitively obvious
Thats how I figured these work. One time use kind of thing. But now I have no idea what to order!
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  #20  
Old 08-04-2008, 05:56 AM
dieselino dieselino is offline
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Oh and DAMN Ron how to you pull this **** up with pics and all??
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  #21  
Old 08-04-2008, 07:33 AM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by jmillet View Post
My 2007 Z4MC uses P/N 07 14 7 172 274 pop rivet ( four on each side) to affix the front fender liner to the bumper cover.
You punch the center pin in to remove and replace with a new rivet. You insert the new rivet and pull the center pin out as far as it will go and then cut off the excess pin shaft.
Not intuitively obvious
You need a metric pop rivet tool .
EPC still shows the 296.
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  #22  
Old 08-04-2008, 07:44 AM
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Quote:
Originally Posted by dieselino View Post
Thats how I figured these work. One time use kind of thing. But now I have no idea what to order!
You could also use 51 11 1 908 077 which is the same as the 296 with a head. That's what I'm going to use in the future.

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  #23  
Old 08-04-2008, 10:39 AM
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Thumbs up Better mechanical contact

Quote:
Originally Posted by Ron Stygar View Post
You need a metric pop rivet tool .
EPC still shows the 296.
A pair of pliers works just fine to pull out the center pin since you cut off the excess material anyway.
It appears that the 274 blind rivet makes a more positive mechanical contact with the inside of the bumper cover than does either the 077 or 296 pop rivets.
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  #24  
Old 08-04-2008, 10:48 AM
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Thumbs up Use the same rivet

Quote:
Originally Posted by dieselino View Post
Thats how I figured these work. One time use kind of thing. But now I have no idea what to order!
The rivet you pictured above is P/N 07 14 7 172 274. Why not replace the rivets with like parts? We're not taking about a lot of money here
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  #25  
Old 08-04-2008, 12:04 PM
ZGirl4U ZGirl4U is offline
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Quote:
Originally Posted by dieselino View Post
Mine dont look like either of those. Those make sense! Here is two pics of the rivets. The pic with the pin inside the rivet is how they came out.
Wow, I was having the same problem yesterday after I tried to install my reflectors. I never even stopped to think theyre for a one time use. A friend of mine just told me to hold a flathead screwdriver while pushing in to get them through. It worked but I dont think theyre 100% secure.
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