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Thread: tub crossmember replacements

  1. #1

    Default tub crossmember replacements

    So I was poking around looking for a suitable place to put the seatbelt mounting and two of the cross members are practically non existent!

    Not good. Can these be replaced without having to take the whole of the rear tub off? I really hope so!

    Will they fail an MOT as they are?

    Seb
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  2. #2
    Mechanic Les Henson's Avatar
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    Default Re: tub crossmember replacements

    They can be replaced with the tub on the vehicle, but welding along the top will be awkward. Yes they will fail the MOT.

  3. #3

    Default Re: tub crossmember replacements

    these are muc8949's where are they welded? They look as if the tub is just bolted/riveted to them.

    The chassis is fine.
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  4. #4
    Consultant biosbill's Avatar
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    Default Re: tub crossmember replacements

    Aaa, ive just done these on mine. Not sure why there'd be seatbelt mountings going through them in your case, but still every LR is different!

    Anyway ive just done these (about a week ago) as im rebuilding, but I had the tub off, which made things so much easier, as I could take out the floor and sealbetween the two at the same time to just make things so much quicker and easier. I have heard that its possible to do it with the tub still on, it might be a little harder, but thinking about it, I cant see any reason why it wouldnt be doable. I think you'd have to loosen all the bolts along the back of the tub (remove them actually) and maybe loosen the front ones too, then you can gentle lift the rear of the tub (assuming the roof is either very loose, or off) and work underneath to slide them in.

    I dont know what your LR is like, but if it was mine Id just remove the tub I think, mines a basic SWB petrol with a rag top (or hard top depending on what I feel like!) and with the amount of bolts id have to loosen to do it (which is easilly the hardest part of removing the tub anyway, as they're kinda hard to get at, and mine were rusted to hell, I just ground the heads off in the end) you'd be well on your way to just removing it, as above, i dont kno what your wiring etc is like but mine was easilly disconnected from the rear lights (should be colour coded on bullet connectors, so pretty easy) I reckon if my bolts werent completly solid it would have taken me a mere 20mins to get the tub off....

    Hope this helps, sorry for the long post!

    Biosbill
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  5. #5

    Default Re: tub crossmember replacements

    very helpful.

    The reason I'm not keen on removing the tub is that I've got a 109 SW with a safari roof and that makes for a lot of taking apart!!!
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  6. #6
    Engineer Serious Series's Avatar
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    Default Re: tub crossmember replacements

    Cannot see why this item should fail an MOt.
    What seat belt mountings are you trying to fix as even new cross rails are probably not strong enough for seat belt mounting.

  7. #7
    Guru Snagger's Avatar
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    Default Re: tub crossmember replacements

    It could be done, but will be difficult. You will almost certainly find significant rot of the floor where it was in contact with the steel braces.

  8. #8

    Default Re: tub crossmember replacements

    The land rover kit bolts through these crossmembers.

    The floor is not too bad at all. Will look at it later and have a think!
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  9. #9

    Default Re: tub crossmember replacements

    Just done one on my swb. Very difficult with tub in situ so cut new one in half, installed and then welded back together.

  10. #10

    Default Re: tub crossmember replacements

    so far you the replies are really great - Thanks!

    ok. Looks possible. I need 4 Crossmembers but... also there appears to be another one of a different shape under the seat box. Looks fairly straightforward to sort but what is this called and what is the p/n?

    This is a 109 12 seat for info.

    Picture here (1.4mb).

    http://www.sebking.com/stage1/crossmembers.jpg
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  11. #11
    Consultant Richie_asg1's Avatar
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    Default Re: tub crossmember replacements

    Did my 3 on a SWB. Was a fiddle though.

    These are the pressed steel supports under the rear tub.

    there are 2 bolts at each end, and flush rivets to find. If you drill out the rivets, and work slowly, they can be slid off rearwards on a SWB because the chassis tapers away.

    I drilled the new one to accept alloy rivnuts, and once fitted, made it easier to do up from the inside with m6 dome head stainless hexagon screws (mouthful - but look fine)

    Plenty of paint and waxoyl on them as they will only fill up with mud again.
    Remember the rubber pieces to contact the chassis - just riveted on. Mine were salvaged so had these already.
    I don't trust Fastcardirect.co.uk as they do not honour sales
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  12. #12

    Default Re: tub crossmember replacements/seatbelts

    update:

    The tub mount reinforcers are p/n MUC8949 and you need 4
    The other one is a bit tricky and NLA. Looks like it was part of the floor and a later part needs to be fitted. This is p/n MUC8950.

    MUC8950 easy to fit, remove riv,nuts x lots. Remove small C post panel slide out the old mess and put new in with liberal underseal. I've used dome headed stainless set screws to replace the riv-nuts and sealed these too.

    MUC 8949. right sod. I've put the first one in closest to the middle row using a jack and fbh. also lots of underseal and using stainless set screws again. Lots of sealant to prevent water ingress.

    This is the one that RTC6065 rear seat belt fitting kit bolts through so it was the important one.

    The remaining three will be done another time and from the rear having removed the petrol tank. They do not warrant replacement yet.

    The is some floor corrosion where the MUC8949 that I have replaced was and also from where mud was trapped at the struts. I'll cut this out neatly and place repair patches on the underside, riveted, and sealed.

    For info the other part of the seat belt puzzle assuming there is already a fixing point in the top of the c pillar is 2x 347844.

    Both 347844 and RTC 6065 are NLA but available from Dunsford and Keith Gott.
    http://www.landroverv8.com

    1970 Triumph Spitfire MKIII
    1982 Land Rover Series III Stage 1 Station Wagon aka the Truck
    1992 Laser 2 Regatta 9101 "Purple Reign"
    2000 Laser Pico 4050
    2001 Brompton Bicycle M3L with 6 speed upgrade
    2010 Volkswagen California 140 GP SE
    2010 Brompton Bicycle M6L "B-Spoke"
    2010 Venture Ranger 16 Canadian Canoe
    2010 Cube Limited Pro MTB

  13. #13

    Default Re: tub crossmember replacements/seatbelts

    Just lifted my floor to find this mess
    IMG_0184.jpgIMG_0185.jpg

    The floor had holes in it and the front to rear spars had virtually disappeared

  14. #14

    Default Re: tub crossmember replacements/seatbelts

    Hi

    Just replaced three of these on my 88 series 3.
    The previous owner had replaced the floor with chequer plate riveted to the sides of the tub and the cross members. Just drilled the pop rivetts out and removed the floor. The crossmembers are then very accessable, so are quite a few vulnerable areas such as the top of the chassis and the rear crossmember. I even topped the rear diff up whist the floor was out. Pop rivetted it all back in palce when I had done messing about.


    Cheers
    Geoff

  15. #15

    Default Re: tub crossmember replacements

    Quote Originally Posted by sebking View Post
    very helpful.

    The reason I'm not keen on removing the tub is that I've got a 109 SW with a safari roof and that makes for a lot of taking apart!!!

    Removing the tub is the only practical way of doing the crossmembers, as these sit on the chassis and the rivets holding then on need to be drilled out from underneath.. You can lift the roof from the tub by hinging on the windscreen brackets.. I'd spay all the bolts with WD40, long before you attempt the job, then spend a long weekend removing all the bolts and tub.. The New crossmembers I bought for my 109 SW were untreated bare steel, so will need painting or better still, Galvanizing.

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