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Thread: Rust help

  1. #1
    Join Date
    Oct 2017
    Location
    New Zealand
    Posts
    8
    My Cars
    BMW E30 316i

    Rust help

    Hey guys, I have been battling rust the day I bought my E30, sad to say I was ripped off very badly. So i'm just wondering how screwed I am, Photos attached. Cheers20171123_203433.jpg20171123_203414.jpg20171123_202420.jpg20171123_202311.jpg

  2. #2
    Join Date
    Apr 2015
    Location
    Toronto
    Posts
    492
    My Cars
    e30s
    what kind of help?

  3. #3
    Join Date
    Feb 2015
    Location
    Maryland
    Posts
    1,221
    My Cars
    325ix, 325ix, 540i
    I don't think you're screwed at all. I have no idea where that first pic is located, but that's a cut and weld job. Or an ignore job.

    It all depends on what your goals for this car are. Do you want to keep it 30 years or is it just a DD with ownership 5-10 years? Do you want it to be a concours car?
    If your e30 runs bad, switch to Megasquirt first. Then try new spark plugs, cap and rotor, wires, oxygen sensor, crank shaft position sensor, coolant temp sensor, air flow meter, idle control valve, throttle position sensor, digital motor electronics unit, harmonic balancer, fuel injectors, engine harness...

  4. #4
    Join Date
    Apr 2010
    Location
    Athol, MA
    Posts
    458
    My Cars
    87 M6, 90 325iC, 89 iX
    For the areas that are just surface rust I have had good luck with the POR15 system of marine clean, metal ready, and then the POR15 topcoat.
    "Life is too Short to drive boring cars"


    1986 325E
    1989 325iX (Long term 5-speed/refresh project)
    1993 MB 300E
    1995 MB E320
    2000 Audi TT (Winter AWD snow beast)
    2007 Porsche Cayman S (Summer car)
    2009 VW Touareg

  5. #5
    Join Date
    Nov 2005
    Location
    canada
    Posts
    193
    My Cars
    2001 740i
    I am in the process of dealing with rust issues on my E30. One thing to be aware of is BMW seam sealer works very well at concealing hidden rust. Those areas that you see in the battery tray will likely require replacement of good portion of the tray once you start poking at it and peeling back seam sealer. POR15 is good for sealing out rust but if there are holes the proper way to fix is to cut and weld new metal.
    1991 318is
    2001 740i

  6. #6
    Join Date
    Jun 2006
    Location
    Wisconsin
    Posts
    2,085
    My Cars
    91' 325i
    That really doesn't seem bad. New Zealand must be much different than the US in that regard. Any car in the midwest here probably has more rust than that if it's been on the road for more than 5 years. It's much worse after 10. I Wish my e30 had that little rust.

    Anywho, just get a wire brush wheel on a drill and brush the areas until you hit bare metal. If that happens and there's no hole, just coat the metal and you're fine. If there is a hole, coat the area for now to keep it from rusting further and put in a metal patch when you can get it to a body shop, unless you can do the work yourself.

  7. #7
    Join Date
    Nov 2009
    Location
    Des Moines, IA
    Posts
    1,005
    My Cars
    90 ix, 91 i & ic, 02 325
    I agree with First Sergeant and bymep- Wire Brush, clean, and Por 15 . POR 15 is real good in sealing rust. I can send you photos of parts I have done..

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