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Thread: MkII seat belt mounts in a MK1 Roadster

  1. #1 MkII seat belt mounts in a MK1 Roadster 
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    The seat belt mounting in my early Marina based roadster are primative to say the least. I would like to fit the arrangement used in the later models which uses inertia reel belts.
    I have seen a picture of the mounting in the later manual. Does anyone have a dimensional drawing? Or even better a set of the seat belt posts, used to mount the interia reels, that are surpless to requirements?

    cheers, Robin
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  2. #2 Re: MkII seat belt mounts in a MK1 Roadster 
    club member Club Member stevejgreen's Avatar
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    I looked at this many years ago. Without removing the rear tub and welding parts to the chassis, I considered it too much effort.

    To be anywhere near ideal the mounting for the shoulder strap needs to be higher than the tub rim, at least higher than your shoulder to be anywhere near standard.
    Last edited by stevejgreen; 09-03-2021 at 06:02 AM.
    MOC member since 05/97
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  3. #3 Re: MkII seat belt mounts in a MK1 Roadster 
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    Car looks like this at the moment. So I have full access!

    in_man-shed1 by Robin Martin, on Flickr

    I am making some other modifications to the chassis which require welding so now would also be a good time to improve seatbelt mounts.
    Anything must be better than the current arrangement my car has.

    Cheers, Robin
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  4. #4 Re: MkII seat belt mounts in a MK1 Roadster 
    club member Club Member jon_wilkinson's Avatar
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    This thread has photos of the Marlin arrangement shown in the build manual: https://www.marlinownersclub.com/for...light=seatbelt

    seatbelt.jpg
    Last edited by jon_wilkinson; 08-03-2021 at 02:35 PM. Reason: added snip from build manual
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  5. #5 Re: MkII seat belt mounts in a MK1 Roadster 
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    Thanks - yes I have seen that. It doesn't seem beyond the wit of man to fabricate.
    Does anyone have any pictures of the actual thing?

    Cheers, Robin
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  6. #6 Re: MkII seat belt mounts in a MK1 Roadster 
    club member Club Member jon_cox's Avatar
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    Quote Originally Posted by martinclan56 View Post
    Thanks - yes I have seen that. It doesn't seem beyond the wit of man to fabricate.
    Does anyone have any pictures of the actual thing?

    Cheers, Robin

    If you follow the link in thread #4 from Jon, you will see a picture on the last but one post
    Mk2 SWB Marina Roadster with a 1800 Fiat Twin Cam engine and 5 speed Abarth gearbox built in 1987
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  7. #7 Re: MkII seat belt mounts in a MK1 Roadster 
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    Quote Originally Posted by jon_cox View Post
    If you follow the link in thread #4 from Jon, you will see a picture on the last but one post
    Thank-you. Missed the image the first time round.
    Cheers Robin
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  8. #8 Re: MkII seat belt mounts in a MK1 Roadster 
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    Here in NZ the existing seat belt system was considered unacceptable - and we need the "ability" to fit a rear roll over bar
    (New build - 26 years old but never been on the road)
    So I made up a cross bar with verticals that a roll bar can be slotted into

    I will be using a four point harness - a standard lap diagonal will not meet the safety requirements - modern seat belts have explosive tightening devices!!
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  9. #9 Re: MkII seat belt mounts in a MK1 Roadster 
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    Wow - that is substatial looking! I have planned a few mods to my chassis but nothing quite that extreme.
    Is the pole running through the middle part of the mechanism by which you can rotate the chassis? What is at either end?


    Cheers, Robin
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  10. #10 Re: MkII seat belt mounts in a MK1 Roadster 
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    Yes the pole is my rotisary

    years ago I bought an engine hoist and it came with an engine build stand - which has been used for one engine and three washing machines so far

    I modified it to be horizontal and a bit taller - that is one end of the rotisary
    I weded a bit of steel tube onto the engine hoist - where it did not get in the way - and that is the other end of the rotisary

    Then some crude brackets to attach to the front and rear bumpers
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