Results 1 to 8 of 8

Thread: Petrol tank leak - help, please.

  
  1. #1
    Status
    Offline
    R493CUY's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    38
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Question Petrol tank leak - help, please.

    The car is an Astra Estate 1.6, 16-valve with the 'Ecotec' engine. I have been told it is a Mark 3; the year letter registration is R.

    There is a small split (about 0.3 inches long) in the bottom centre of the petrol tank: that surface of the tank that is horizontal and parallel to the road surface. (How the split occurred, I have no idea - not that that matters now, anyway).

    To repair this, I have tried "Petro-Patch". I started with the tank completely empty. I thoroughly cleaned the metal surface until it was immaculately clean and then slightly roughened it with Emery cloth to provide a good key. I carefully mixed the 'Petro-Patch' compound (as per the manufacturer's instructions) and applied it to the affected area and left it for 72 hours to cure. Then I put about 10 litres of petrol in the tank. At first, no signs of leaks. But two days later, it is leaking again. It seems to be coming through the "Petro - Patch" compound, rather than seeping from around it, due to poor adhesion of the compound to the metal surface of the tank

    So "Petro-Patch" doesn't seem to work (which surprised me ) So - has anyone here any suggestions of how I can fix this leak? - apart, that is from replacing the tank (expensive! )

    Thank you.

  2. #2
    Status
    Offline
    gsi_10's Avatar
    AOC Obsessed
    Join Date
    Mar 2010
    Posts
    4,812
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Done a quick google search and 3 links i clicked brought up the same product

    http://shop.ebay.co.uk/items/__jb+we...=228459_228460

    Seems to be quite good, unfortunately you know the way to guarantee how to permanently fix the issue

  3. #3
    Status
    Offline
    Mxrrab's Avatar
    AOC Regular
    Join Date
    Apr 2009
    Posts
    108
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Also if this is spotted at mot time it will not pass, as the petrol patches and such like products no longer qualify when passnig an mot. As far as im aware. Get down the scrappy for a second hand one.

  4. #4
    Status
    Offline
    R493CUY's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    38
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Thanks for your replies.

    So, how far have I now got with this?

    1."Petro-Patch" didn't do "what is says on the tin" - and no comments.

    2. Even if I was successful with a repair in this direction, it would not be acceptable for an MOT (over-looking, for the time-being, my ability to disguise the repair with underseal . . . but then again I'm sure that trained MOT testers know all the tricks! - and have sharp eye-sight) and which, in retrospect, doesn't surprise me (although I hadn't really thought about this aspect); but thanks for the advice, anyway.

    3. Trip to the scrap-yard; obtain second-hand tank; remove leaking one; fit replacement. O.K.; fine in theory - but it would appear to me that you do need certain 'garage-type' facilities to do this - such as a pit or a hydraulic lift to gain access to the underside of the vehicle - which, of course, I don't have. And then there is the question of the weight of the tank, etc. Doesn't this job also really require two people to do this (which are not available)?

    4. Take the entire job to a professional garage, ask them to do the job - and simply dig hands deep into pocket. I'm not sure if this car is worth that expense - the consequences of which would be a shame; it's a really nice car.

    So - I'm still not sure just what to do about this problem.

  5. #5
    Status
    Offline
    pewseyfam's Avatar
    AOC Obsessed
    Join Date
    Jul 2008
    Posts
    1,579
    Mentioned in
    2 Post(s)
    Quoted
    2 Post(s)
    I have removed a petrol tank from my mk2 astra on my own with just axle stands for access. The tank is not that heavy.
    btw, I braised up the leak on my tank after flushing it out with a fire hose for 4 hours and the fumes still caught alight when I put the torch to it!!!!
    T
    Viva HB(DL90), Escort Mk2(1.3L), Astra E(1.6L), Astra F(1.4Merit) Astra F(Arizona),Astra E(1.6GL), Laguna(2.0RXE), Astra F(2.0CDX), Astra G(1.7LS)!!

  6. #6
    Status
    Offline
    R493CUY's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    38
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)
    Re: Post #5; thank you for your reply. Axle-stands and one man, eh? Yup, I think I can run to that!

    Further to all that has been written above, I have now been advised (by a reliable & knowledgeable source) that as far as MOT is concerned, a repair along the lines mentioned above is indeed 'acceptable'; the criterion is simply that the tank is 'fuel-tight' when under normal use.

  7. #7
    Status
    Offline
    R493CUY's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    38
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Arrow

    Quote Originally Posted by Mxrrab View Post
    Also if this is spotted at mot time it will not pass, as the petrol patches and such like products no longer qualify when passing an mot. .
    I have had it confirmed by three garages that a visible repair to a petrol tank - provided it is not leaking - is not an MOT failure.

  8. #8
    Status
    Offline
    R493CUY's Avatar
    AOC Newbie
    Join Date
    Jun 2008
    Posts
    38
    Mentioned in
    0 Post(s)
    Quoted
    0 Post(s)

    Arrow

    Update, Aug. 3, 2010.

    For over one week now, 'Plastic Padding' filler has been applied as a repair - and as yet, there are no signs of an adverse or disintegration effect of the petrol on this compound. Nevertheless, a watchful eye will need to kept on it for a few weeks yet, just to be sure.

    Further updates to follow . . . . .

Similar Threads

  1. MK4 petrol tank
    By c150student in forum Astra Discussion & Chat
    Replies: 4
    Last Post: 02-12-2009, 23:34
  2. half tank or full tank of petrol?
    By dgoulston in forum Astra Discussion & Chat
    Replies: 41
    Last Post: 24-09-2007, 15:54

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •