BMW M3 Forum
BMW M3 Forum BMW M3 Gallery BMW M3 Reviews BMW M3 Social Groups BMW M3 Chat M3Forum Sponsors >>
Loading


Mobile M3forum
Go Back   BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X) > BMW M3 Discussions > E46 M3 (2001-2006)
Tire Rack Buy Winter Tires Now!
Not a member? Register Now!
Register Gallery All Albums Garage Search Today's Posts Mark Forums Read Calendar FAQ

E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


Reply
 
Thread Tools Display Modes
Old Thu, Aug-16-2018, 05:43:04 AM   #21
icecream
Registered Apples
 
icecream's Avatar
 
Join Date: Aug 2012
Age: 14
Posts: 2,397
In the garage:
Reputation: 0 icecream is on a distinguished road
Location: PNW

United States




Default Re: Popped Spot Weld

Quote:
Originally Posted by M3_Pilot View Post
Okay, I have quite an update. I got under the car again and looked at the popped spot weld again that the tech showed me. Now that I have relaxed a bit I'm pretty sure that that crack is very easily able to be fixed. Without even dropping the subframe.



Back of the spot weld.



And the crack that I initially saw is not a tear. To be honest I have no idea what it is. Sorry lmfti but I was never known to be very artistic.





So ya, by no means am I trying to cut corners but I think I may have overreacted quite a bit. My car still has discrepancies that I have to address but I am very relieved.

That being said I do need to find someone that can help me weld that little crack on the spring perch.
Am I the only one that sees the head?
Jump to top icecream is offline   Reply With Quote
Sponsored Links
Register now and remove these ads
Old Thu, Aug-16-2018, 06:41:27 AM   #22
TboneM3
YNWA
 
TboneM3's Avatar
 
Join Date: Oct 2009
Posts: 7,930
In the garage:
Reputation: 0 TboneM3 is on a distinguished road
Location: Socal

United States




Default Re: Popped Spot Weld

I see jesus
__________________
/// 2004 SilberGrau M3 ∑ Coupe ∑ 6MT ∑ slicktop ∑ manual seats ∑ zero options ∑ JOURNAL
-NA S54-


∑Evolve-R Alpha N ∑ Evolve CSL CF Airbox ∑ Eventuri Scoop ∑ Supersprint V1 stepped 63mm ∑ SS V1 S pipe 63mm + 200 cell HFC ∑ OE sect 2 60mm ∑ SS Sport 60mm
∑Besian ∑ RE pullies/fan delete ∑ WPC rod bearings ∑ GroundControl S/A (Koni/Eibach 440/550) + tall RSMs ∑ TMS Camber & Subframe plates ∑ SPC Adj alloy rear camber arms
∑RE Trans Mounts ∑ AKG poly SUB/DIFF 95a ∑ SDW RTAB ∑ Weighted ///M knob + UUC DSSR + delrin carrier bush ∑ OE CSL trunk ∑ APEX 75mm Studs
∑Sportline 8S 18"x8.5/9.5" ∑ MPSS 245/275 ∑ Brembo 996 36/40 345mm CSL Textar FF & 28/30 328mm CSL ATE "D738" FF ∑ CM brackets & ss/teflon lines
∑Pioneer DEH-80PRS ∑ Eclipse PA5422 ∑ CDT HD-6 + WS-100i ∑ CDT EX-530 ∑ 8" Kicker

DD/Beater: 1999 Civic LX - Kenwood x998 ∑ PPI 1600.4 ∑ CDT HD-6 + HD-100 ∑ CDT EX-530 ∑ DVC 10"
Jump to top TboneM3 is online now   Reply With Quote
Old Thu, Aug-16-2018, 07:01:28 AM   #23
mrgizmo04
Registered User
 
mrgizmo04's Avatar
 
Join Date: Jan 2017
Posts: 2,460
In the garage:
Reputation: 0 mrgizmo04 is on a distinguished road
Location: Menlo Park

United States




Default Re: Popped Spot Weld

I see a pony

Sent from my SM-G950U using Tapatalk
__________________
'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, WPC rod bearings, Beyer driveshaft, full SS (SS stepped V1, catted S1, resonated S2, SS sport), Sachs clutch/flywheel, rear main, VANOS bullet proofing with anti-rattle, valve adjustment, cooling refresh, Ohlins R&T/Swift 448f 672r/GC street tops and camber plates, AFD E85 Proflex kit.

Happy to help with VANOS or any other DIY job around NorCal
Jump to top mrgizmo04 is offline   Reply With Quote
Old Thu, Aug-16-2018, 07:09:09 AM   #24
HassanEido
Registered User
 
HassanEido's Avatar
 
Join Date: Oct 2014
Posts: 3,327
In the garage:
Reputation: 0 HassanEido is on a distinguished road

Lebanon




Default Re: Popped Spot Weld

sorry for the late reply, i meant to do that sooner but somehow forgot.You will indeed have had cracks in the spring perches already by the time the trunk floor spot welds give way.
Your internal mount spot welds are most definitely cracked. Also check for the spot welds behind the rear seats.
Having said that, all u need is a mig welder , and a few steel sheets and a 3x4x(length from chassis leg to chassis leg length) piece of steel. Its not as hard as u think if u have a mig welder and know what u're doing.. good luck
__________________

Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10

Last edited by HassanEido; Fri, Aug-17-2018 at 05:15:17 AM.
Jump to top HassanEido is offline   Reply With Quote
Old Thu, Aug-16-2018, 04:22:30 PM   #25
M3_Pilot
Registered User
 
Join Date: Mar 2012
Posts: 589
In the garage:
Reputation: 0 M3_Pilot is on a distinguished road
Location: OC

United States




Default Re: Popped Spot Weld

Appreciate your help, everyone! Hassan not everyone has the learning curve you do!
__________________

2004 Jet Black/Cinnamon 6MT
@jet.m3
Jump to top M3_Pilot is offline   Reply With Quote
Old Sat, Aug-18-2018, 03:19:07 AM   #26
Paulo M
Registered User
 
Join Date: Jan 2015
Posts: 1,953
Reputation: 0 Paulo M is on a distinguished road

United States




Default Re: Popped Spot Weld

This is scary, even scarier that you didn’t notice or hear anything while driving. Hope things get resolved op.

Wasn’t thinking of buying a Vince/cmp bar but these threads are getting more and more common. Went from subframe failure threads to rcp failures.

Edit: nvm just saw that the problem isn’t as big as anticipated. Great news
__________________
BREMBO BBS DIXIS
Jump to top Paulo M is online now   Reply With Quote
Old Sat, Aug-18-2018, 07:49:10 AM   #27
AussieE46M3
Registered User
 
Join Date: Nov 2015
Posts: 207
In the garage:
Reputation: 0 AussieE46M3 is on a distinguished road
Location: Gold Coast

Australia




Default Re: Popped Spot Weld

Hey M3_pilot,

I received your email, just wondering if you received my response?

Where you've chiselled up a bit of the sound deadening matt, it looks like you've caught the edge of the spare wheel well panel that ends just an inch under that rubber like mat.
If it was bowing upward like that before you chiselled it away I'd be curious as to how. It looks to be bowing between two spot welds which leads to believe they haven't failed in this area.

The second area you've encountered I mentioned in the email and is the most common sign of early secondary failure and isn't a crack at all. It's just the spot welds let go and the resulting movement tears the seam sealer. If left long enough cracks can initiate off the spot welds.
Have a look at the opposing side just above the spot welds. This one doesn't seem to pop but rather form a crack where the 3 faces meet. I can share a photo of this area if you message me on Facebook.

If you are looking for damage on the topside, I would look at the far left side of the boot floor where it meets the chassis rails just in front of the little anchor point. The flange of the chassis rails is spot welded to the floor and prone to separate once the above wheel arch seam begins to let go.
You will need to remove the deadener material like you have already in this area to inspect it correctly. Alternatively, popped spot welds can sometimes be seen from beneath.





In short, it looks like you're only in the very early stages of secondary failure. Don't panic, it isn't serious however, like you already are, I'd start planning for a repair.

If you want to keep inspecting other areas, I'd suggest removing the back bench seat and removing the seam sealer along the chassis rail there as well as inspecting around the far left seat anchor point.
They're also common areas of failure often not addressed during a repair. The front mount extension kit I offers reinforces this particular area.

http://cmpautoengineering.com/produc...extension-kit/



Jump to top AussieE46M3 is offline   Reply With Quote
Old Sat, Aug-18-2018, 08:36:37 AM   #28
HassanEido
Registered User
 
HassanEido's Avatar
 
Join Date: Oct 2014
Posts: 3,327
In the garage:
Reputation: 0 HassanEido is on a distinguished road

Lebanon




Default Re: Popped Spot Weld

Quote:
Originally Posted by M3_Pilot View Post
Appreciate your help, everyone! Hassan not everyone has the learning curve you do!
__________________

Mods:
-Custom CF airbox
-SSV2 catless headers, Custom 2.5" dual sec1, Custom sec2 2.5" dual with e9xM X pipe, SuperSprint Race inspired custom section 3..
-Cat Cams 280 272.
-Custom dyno tune
-Tms pulleys and electric fan conversion
364.1 whp 287.8 wtq

Custom exhaust thread and dyno http://m3forum.net/m3forum/showthread.php?t=569086
Cams thread and dyno http://m3forum.net/m3forum/showthread.php?t=554439
Custom cf airbox thread http://m3forum.net/m3forum/showthread.php?t=595180
Why not to use after market bearings with surfacetreatments and /or increased clearance
http://www.m3forum.net/m3forum/showp...4&postcount=10
Jump to top HassanEido is offline   Reply With Quote
Old Sun, Aug-19-2018, 08:41:04 PM   #29
M3_Pilot
Registered User
 
Join Date: Mar 2012
Posts: 589
In the garage:
Reputation: 0 M3_Pilot is on a distinguished road
Location: OC

United States




Default Re: Popped Spot Weld

Hi, Aussie,

I replied to your email. Yes the spot welds are popped just as you said. I'm getting them patched up on Tuesday along with my diff bushings and ordering the CMP Bar by the end of next month. Thanks a lot for your help.
__________________

2004 Jet Black/Cinnamon 6MT
@jet.m3
Jump to top M3_Pilot is offline   Reply With Quote
Old Sun, Aug-19-2018, 08:43:29 PM   #30
M3_Pilot
Registered User
 
Join Date: Mar 2012
Posts: 589
In the garage:
Reputation: 0 M3_Pilot is on a distinguished road
Location: OC

United States




Default Re: Popped Spot Weld

Quote:
Originally Posted by Paulo M View Post
This is scary, even scarier that you didnít notice or hear anything while driving. Hope things get resolved op.

Wasnít thinking of buying a Vince/cmp bar but these threads are getting more and more common. Went from subframe failure threads to rcp failures.

Edit: nvm just saw that the problem isnít as big as anticipated. Great news
Yes, very good news! I'm still going to get a cmp bar however. And a motorcycle.
__________________

2004 Jet Black/Cinnamon 6MT
@jet.m3
Jump to top M3_Pilot is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump



All times are GMT. The time now is 12:18:23 AM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
M3Forum.com and M3forum.net is in no way sponsored, endorsed or affiliated by or with BMW NA / BMW AG or any of it's subsidiaries or vendors.
BMW and M3 (E90 M3 | E92 M3 | E93 M3 | E46 M3 | E36 M3 | E30 M3) are registered trademarks of BMW AG.
M3Forum Terms of Service
Copyright ©1999-2017 M3Forum.com
Discussing Popped Spot Weld in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)