1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

What’s best for removing rust from chassis

Discussion in 'Defender 90 / 110 / 130' started by Mr G Imp, Nov 7, 2020.

< Previous Thread | Next Thread >
  1. Mr G Imp

    Mr G Imp Active Member

    Joined:
    Jan 27, 2019
    Posts:
    153
    Likes Received:
    66
    Location:
    Gloucestershire
    Hope someone has some advice here As per title - I have a battery grinder that I could attach something onto? It’s for removing/prepping surface rust on chassis before painting chassis with chassis paint or waxoyl or whatever - cheers !
     
  2. Beneagles

    Beneagles Well-Known Member

    Joined:
    Oct 27, 2009
    Posts:
    4,588
    Likes Received:
    2,372
    Location:
    North Perthshire
    First remove the body. It makes access sooooooo much easier! :D
     
  3. Europa486

    Europa486 Well-Known Member

    Joined:
    Sep 28, 2019
    Posts:
    447
    Likes Received:
    383
    Location:
    London
    For loose rust I used a needle gun, it will tell you instantly if it’s surface rust or goes much deeper,
     
    Zed. and Dippypud like this.
  4. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    6,936
    Likes Received:
    6,771
    Location:
    Thatcham
    You will probably find the metal used to make your chassis wasn't that good to begin with. There will be imperfections in the steel that will eventually cause corrosion no matter what you do. Prepping and treating old chassis's is a never ending job unfortunately. My take on it is that I could spend several hours each year or two trying to keep the rust at bay or just leave it until it is dead, then buy another chassis. I choose the later. My landy is 43 years old and apart from whatever the factory coated it with to begin with, it's had no other treatment and it's actually still pretty good, just one new outrigger 6 years ago which I didn't bother painting.

    Col
     
  5. Mr G Imp

    Mr G Imp Active Member

    Joined:
    Jan 27, 2019
    Posts:
    153
    Likes Received:
    66
    Location:
    Gloucestershire
    It’s a 31 years old 90 - there is a bit of welding needed on the floor and front outrigger which I will get done first - but it’s pretty solid overall, has had a new rear chassis end bit at some point. I have been leaving it up till now but I want to spend some time making it look a bit nicer over the winter, prep it up and paint including the body work.
     
  6. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    6,936
    Likes Received:
    6,771
    Location:
    Thatcham
    Then as Europa486 suggests, a needle gun is best for removing rust but they are noisy and a bit fierce. Alternately, use a wire brush or flap wheel on a drill, make sure you wear safety glasses. Once down to shiny metal, then you can prime and paint or apply one of the usual chassis protection products. There is a guy near me who use a very high pressure steam wash but he advices that quite often, there isn't much metal left after he has blasted away the crud.

    Col
     
  7. Mr G Imp

    Mr G Imp Active Member

    Joined:
    Jan 27, 2019
    Posts:
    153
    Likes Received:
    66
    Location:
    Gloucestershire
    Needle gun looks like it would go right through the chassis !
     
  8. Colthebrummie

    Colthebrummie Well-Known Member

    Joined:
    Jan 24, 2017
    Posts:
    6,936
    Likes Received:
    6,771
    Location:
    Thatcham
    Like I say, they are fierce. Approach with caution. I use a flap wheel to shift rust usually.

    Col
     
  9. lynall

    lynall Well-Known Member

    Joined:
    Feb 28, 2011
    Posts:
    14,495
    Likes Received:
    8,513
    Location:
    Kent
  10. 110tim

    110tim Member

    Joined:
    Dec 22, 2015
    Posts:
    17
    Likes Received:
    7
    Location:
    Maldon
    when I replaced the chassis on my 1983 110 some 18 years ago I was horrified by the state of the top of it , the part you cannot see because the body is in the way, you could poke your fingers through it !! It would be worth checking the condition of the chassis overall before spending too much time on it
     
  11. Mr G Imp

    Mr G Imp Active Member

    Joined:
    Jan 27, 2019
    Posts:
    153
    Likes Received:
    66
    Location:
    Gloucestershire
  12. bluedog333

    bluedog333 Well-Known Member

    Joined:
    Jun 7, 2014
    Posts:
    3,826
    Likes Received:
    2,547
    Location:
    Henley on Thames, Oxfordshire
    Horses for courses really. It depends on how bad the rust is as to what device you use. Personally I tend to use either a wire wheel, a flap disc or a clog-free disc, I also like a phosphoric acid based rust converter to slap on, it helps stop the rust in its tracks. I don’t have an air compressor, but needle guns are good for really heavy rust, by which point you may be needing a welder!
     
    Shippers likes this.
  13. Shippers

    Shippers Well-Known Member

    Joined:
    Mar 7, 2017
    Posts:
    6,981
    Likes Received:
    4,857
    Location:
    Algarve
    Agree...you need a good compressor for a needle gun...youtube maximus ironthumper is doing a chassis as is churchhouse classics just now...
     
    bluedog333 likes this.
  14. kevstar

    kevstar Well-Known Member

    Joined:
    Sep 25, 2013
    Posts:
    6,556
    Likes Received:
    11,476
    Location:
    In the next Glen
    Needle gun fk that I hate them horrible things make yer fillings fall out lol
    A half decent compressor & a sand blaster or can use metal fillings/soda/bead ect
    will make a quicker & better job of it.
     
  15. frog hopper

    frog hopper Well-Known Member

    Joined:
    Oct 10, 2009
    Posts:
    3,306
    Likes Received:
    2,769
    Location:
    france
     
  16. meego

    meego Well-Known Member

    Joined:
    May 20, 2010
    Posts:
    5,587
    Likes Received:
    4,422
    Location:
    Caledonia
    If a needle gun goes through the chassis, it needs welding then !!
    Spend 30 odd quid and buy a mains grinder as a battery one isn’t great to power a wire cup brush, which is the best thing for scale and surface rust removal IMO.
     
  17. Mr G Imp

    Mr G Imp Active Member

    Joined:
    Jan 27, 2019
    Posts:
    153
    Likes Received:
    66
    Location:
    Gloucestershire
    It’s mainly surface rust luckily....I have a mains grinder on standby when the battery one is not up to the jobs !

     
  18. v8250

    v8250 Well-Known Member

    Joined:
    Jun 23, 2019
    Posts:
    1,606
    Likes Received:
    1,657
    Location:
    Berkshire
    @Mr G Imp , I recently completed the same as you're about to start. The job's quite straight forward but very messy...
    1. Remove all crud and ancient waxoyl type muck
    2. Spray/soak chassis with Gunk degreaser [place large sheet of carboard underneath to catch dripping Gunk], wipe off excess two days later
    3. Spray/soak chassis with slow drying degreaser
    4. Use heat gun to flash off any slow drying degreaser
    5. Wire wheel back any surface rust
    6. Paint complete chassis with zinc rich/acid etch primer
    7. Paint complete chassis with Buzzweld Red/Brown Primer and leave to dry for a good few days
    8. Paint complete chassis with Buzzweld glass based 2k FX Chassis Paint - this comes in spray can for ease of application - WARNING this is a 2k paint :. contains isocyante which is very carcinogenic. You must wear complete coveralls, boots, gloves, safety goggles and use the Gerson 2k disposable masks
    9. Let to dry, then carefully inspect/repaint where the aerosol will swirl out in the tight to reach places
    10. For seams, re-touch in with a paint brush
    11. Make mug of tea and enjoy with your favourite choice of biccies, and sit back and admire your new chassis...

    Then Dinitrol or BiltHamber the life out of the chassis inner box sections - I find 2-3 recoats get into every crevice.

    Repeat pt.11 :)
     
  19. landowner

    landowner Well-Known Member

    Joined:
    May 24, 2008
    Posts:
    9,893
    Likes Received:
    655
    Location:
    Cheshire
    Or remove surface rust and paint the chassis in old engine oil at least twice, do it every couple of years and let the dust etc mix with the oil to make a coating of thick mucky oil and it'll last forever
     
  20. Dippypud

    Dippypud Never Knowingly Understood

    Joined:
    May 2, 2011
    Posts:
    56,338
    Likes Received:
    31,967
    Location:
    The Wooly Witch
    Well it’ll last until the inside rots out....
     
< Previous Thread | Next Thread >