Cutting a hatch for the fuel sender

Discussion in 'Mech Tech' started by yorkieman, Oct 8, 2021.

  1. As a winter job, I am thinking of attempting to cut a hole to access the fuel sender to try to cure my none working gauge issues.. I have the panel but, not sure how to go about cutting the hole safely.

    Any ideas?
     
  2. Dremel and get your measurements correct
     
  3. You can use a jigsaw, there is more of a gap between the panel and the tank than you might think - just be aware of fuel sender wires



    20130610_201609.jpg
     
    snotty and yorkieman like this.
  4. I would use a monodex cutter to reduce any spark risk. 5E56CACB-55F2-4BE8-85D5-75AE96AAF46D.png
     
  5. measurements to get right :
    IMG_20211008_221159692.jpg
     
    snotty and yorkieman like this.
  6. Will that strong enough to cut it, it seems quite thick sheet.
     
  7. There are different quality ones. I’ve done sunroof cuts with them in the past. They reduce the fire risk.
    You’ve got to be really careful next to fuel tanks. These vans always have perished vent pipes and the tank is in a confined space…
     



  8. Sent from my SM-N970F using Tapatalk
     
    olnow, Soggz, yorkieman and 1 other person like this.
  9. mikedjames

    mikedjames Supporter

    If you take off the firewall and let it vent for a while it reduces the risk of there being an inflammable fuel/air mix..
    In which case you can in principle can get at it without cutting a hole.
     
    Soggz likes this.
  10. nope. i`d have to take the petrol tank out to get at mine if i dont cut a hole. there isnt enough room to physically fit my hand between the structure of the bus and the tank.

    i dont have gorilla hands either.

    I`m going for the angle grinder approach - i know my breathers are ok though.
     
  11. If you've got the firewall off, you can swap the sender. It's a quarter turn bayonet fitting and can be tight but it can be done. You don't need the tank out.
    It's a bit of a pain mind so I can see why people want to hack holes in the floor, especially with a type 1 engine, but I've managed to get into my sender four times in different buses without cutting.
     
    rob.e likes this.
  12. mikedjames

    mikedjames Supporter

    I did have to push down the breather pipes to get in there. Exactly central the tank has the dip for the sender that lets you put your hand in then bend your fingers.
    I do have to wear XL rubber gloves so my hands arent exactly small. I can just touch the panel in front of the tank with my finger tips.

    I knew it was possible because SGS Aircooled changed my sender without cutting metal as about the first thing done to my bus.
     
    Last edited: Oct 11, 2021
    rob.e likes this.
  13. i could not even touch my sender when i was rummaging the other day?? i could barely get my hand in far enough to get my fingers halfway across the tank. Not that it matters but i defo could not change the sender. one of my kids might i suppose :thinking:
     
    Zed and jim mcglynn like this.
  14. Zed

    Zed Gradually getting grumpier

    That has been my experience too. Maybe Mike has a later tank/bus combo.
     
  15. Maybe that explains it. Early tanks have a screw on mesh filter and probably other differences too.
     
  16. Zed

    Zed Gradually getting grumpier

    I did manage to detach one from the tank, but no way was it wriggling out of there. I used to be against cutting a sender access, but now I'm all for it!
     
  17. mikedjames

    mikedjames Supporter

    It is a later tank as the back end of my October 1973 bus is definitely late, even if the steering column is early ..

    On mine there is just room for the top of the sender to slide across the front of the tank. It wont come straight back out .
     
  18. mikedjames

    mikedjames Supporter

    The new sender has a linear pitch of winding of the resistance - the old one had three different pitches , effectively changing reading faster near empty than near full... so I will have to re-learn the calibration..


    Sliding sender out to the side, observe PO screw-of-concern above ..
    20211013_162635.jpg
    Old sender with temporary 1mm paper gasket above, new with 3mm cork and rubber cut out of a sheet.
    Inked20211013_162808_LI (2).jpg
    Hand wedged in for access...
    20211013_162647.jpg



    Its in ! DC resistance is 20 ohms to ground with a tank that is about 15 litres down from full. (Membury Services to home)
    20211013_163209.jpg
     
    Valveandy likes this.

Share This Page