Smell of petrol when going through roundabouts? Then read this...

Discussion in 'How To' started by Joker, Aug 10, 2011.

  1. @Top Banana Racing , @vwed has a tank top t-piece you need for the Doka, NOS, I got one for mine
  2. Yes, I've got the correct NOS part for Pick Ups from August '71 onwards.
    #16 in the diagram on page 3.
  3. Such a good read , learnt loads, am even considering Teckenders
    Robo likes this.
  5. Very informative. New to bus ownership and have petrol smell in our '79 bay with HO series 1.5 ltr '67 engine. Looked in engine bay and discovered opened ended breather pipes and missing pipe between breather t-piece to air filter in let. Will investigate all other joints now! Thanks.
    CollyP, bernjb56 and Neptuneblue like this.
  6. This is what I found.
    image.jpg image.jpg image.jpg
    mgbman and Neptuneblue like this.
  7. One to watch out for, accelerator pump diaphram on PDSIT carbs. If this gets perished petrol will leak each time you accelerate.
  8. PSG


  9. had the petrol neck filler replaced when the engine bay was done after the fire. Had they not done, looking at the state of it, I suspect I would have had another fire in 2016 as it was split right through.
  10. I'm just going through the process now to get the tank out and replace all the fuel and breather hose. What I'm interested in is where people have got their fuel hose from? It seems to vary quite a bit in quality and price...

    Here in Germany E10 95 unleaded is the norm so I want to be double careful what I'm getting. I was looking at VWH, JK, CoolAir etc in the vague hope they know their onions when it comes to fuel hose quality.

    I gather the fuel hose is 5.6mm from above posts, which is reassuringly confirmed by CoolAirVW. They are selling it at €5,80 p/m which is rather cheap considering JK sell 5mm hose for €16,33 and VWH for €15,90! I am wondering if because CoolAir sell worse quality hose or just not trying to rip you off (or a combination of the two?)

    JK state their hose is 5mm, VWH 5.5mm. The VWH are Goodridge, but then also Braided which people have said not to use :confused:. The local VW supplier here says it should be 6mm...

    Same goes for the breather hoses. CoolAir reckon 7mm, but JK, VWH and all state different sizes! o_O I guess maybe a range will fit, depending on how forceful you are....?
  11. Baysearcher

    Baysearcher [secret moderator]

    Last edited: Feb 15, 2016
    Sam1 likes this.
  12. I used the CODAN 5.6mm hose throughout, fuel lines and breathers. Don't use any braided stuff.
  13. 6mm is too big as it's actually 6.3mm = 1/4"
    5.6 is bob on, 5mm will be a squeeze and really 4.8mm and therefore fail around the fittings before the 5.6mm.
    All these sizes are imperial really, then converted cos we is decimal now. :)
    6.3 = 1/4"
    5.6 = 5/32"
    4.8 = 3/16"
    I think. :)
    so 6.3 gets sold as 6mm,1/4"
    5.6 seems safe
    4.8 is sold as 5mm , 3/16"
    Not to mention these are nominal sizes and vary from one producer to another...
  14. Ok thanks, I think I found it on German Ebay

    Kraftstoffschlauch auch Bio-Diesel, Benzinschlauch, Dieselschlauch, DIN 73379-3E:

    Comes in 5.5mm and 7.3mm inside diameter sizes so close enough for fuel lines and breathers respectively I would guess.

    Point taken about the price of good quality hose but the VW Aircooled Works kits would work out as €105 for 3.75m of hose and the clips :eek:. The ebay stuff is €15,50/m which for 100% biofuel so still cheaper than the JK and VWH stuff which isn't :thumbsup:

    I'm actually quite surprised these 2 main suppliers don't get in on this act and sell the "fit and forget" stuff, considering the safety factor, and related lengthy TLB discussions :p
    mgbman and matty like this.
  15. I’m not at all surprised; what would you do if you could sell something several times or only once? There are still suppliers selling SAE J30 R7 hose and that’s known to fail in weeks, even SAE J30 R9 won’t last long but it’s still being recommended and one supplier states ‘YOU ABSOLUTELY MUST NOW USE THIS GRADE OF FUEL HOSING’ (their caps).

    Hose to DIN 73379-3E should be fine but I’m yet to be convinced it is only Ethanol damaging hoses – my SAE J30 R9 was still perfect within the engine bay but from tank to filter to pump to bulkhead was hard and cracked through to the inner braiding but the inside of the hose, that had been in contact with Ethanol, was undamaged.

    I fitted 100% bio fuel resistant hose but I haven’t forgotten it.
  16. Stupid question - should the fuel neck at the flap have rubber hose down it. Mine hasn't as this picture shows: [​IMG]

    Just to confirm this photo is the view down the fuel neck at the petrol flap.
  17. Build date of your vehicle?

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