add atf fluid in diesel cure leak

Discussion in 'Engine' started by ricardo62, Apr 27, 2014.

  1. ricardo62

    ricardo62 Hardcore MB Enthusiast

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    hi I have a very small leak from around the pipe on the fuel pump , ive heard on other forums that adding a litre of atf fluid to a full tank of diesel will make the o rings seal and hopefully stop it , apparently other people have had success , any thoughts on doing this ? car e320 diesel yr 2000
     
  2. renault12ts

    renault12ts MB Club Veteran

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    I think I have that leak too...you try it and report back.
     
  3. guydewdney

    guydewdney Hardcore MB Enthusiast

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    I have chucked in atf with good results in older diesels, but not tried regarding leaks.
     
  4. OP
    OP
    ricardo62

    ricardo62 Hardcore MB Enthusiast

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    In that case I will try it , ans Renault 12 ts its a very slow drip from the pump on front of engine left side of pump , I googled diesel fuel leak and was directed to some forums where people have added a litre to a tank of diesel , and it apparently causes the o ring to swell and seal .
    apparently a cause of a lot of leaks is low sulphur diesel that is used now ,I will report back when ive tried.
     
    1 person likes this.
  5. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    Fix the leak.
     
  6. OP
    OP
    ricardo62

    ricardo62 Hardcore MB Enthusiast

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    yes fixing the leak is the best option , but until I have it fixed I thought id try the cheaper option see if it works .
     
  7. E270 Owner

    E270 Owner Hardcore MB Enthusiast

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    Seals "dry out" not just because of the fuels lack of additives.

    Replace them if they are leaking as you will regret it when they fail and your in the middle of nowhere at 03:00
     
  8. Harlowcabbie

    Harlowcabbie Hardcore MB Enthusiast

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    Isn't the seal cheaper than 1 litre of ATF fluid . And only about 2 mins to fit it.
     
  9. E270 Owner

    E270 Owner Hardcore MB Enthusiast

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    Yes but once your committed to changing the seals, the pipes usually need to be or should be replaced as they get brittle.

    Still a cheap little job though :)
     
  10. renault12ts

    renault12ts MB Club Veteran

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    Can you describe how to do it please...I might go down that route...in any case I have it booked in in two weeks time...but a little knowledge etc...
     
  11. Twistedmind

    Twistedmind Hardcore MB Enthusiast

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    Replace it and get it sorted. Best option

    Sent from my iPhone using MBClub UK
     
  12. Auto-mobile

    Auto-mobile Hardcore MB Enthusiast

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    Cheaper option usually results in paying twice and doing what should have been done in the first place, if you want to introduce anything other than diesel oil to a cdi engine be my guest, the seals are like £1.50 each from merc and neither of them are difficult to change.
     
  13. OP
    OP
    ricardo62

    ricardo62 Hardcore MB Enthusiast

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    Looks a fiddly difficult job to me , I am not sure if I would be able to , how much would a garage charge ? it looks very fiddly and poss have 2 remove the radiator
     
  14. bob6600

    bob6600 Hardcore MB Enthusiast

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    I had a leak from the HP pump to the rail, had the pipe and seal replaced and so far so good. Will check next weekend to see how it is, I had air bubbles in the fuel line under load but have never had a starting or running problem (apart from reduced mpg)

    If it's the same pipe, it's about £40-£45 from Merc
     
  15. OP
    OP
    ricardo62

    ricardo62 Hardcore MB Enthusiast

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    I cant see exactly where its leaking , I need to clean it up to see , but its a very slow drip coming from the left side of fuel pump if your standing looking at engine im not sure if its coming from the back of fuel pump or a pipe where it goes into pump ..
     
  16. Harlowcabbie

    Harlowcabbie Hardcore MB Enthusiast

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    Sounds like one of the two bottom pipes . Simple fix undo the plate holding them in replace seals and then refit. Takes couple of minutes.
     
  17. Lord-WYBMAnE220

    Lord-WYBMAnE220 Hardcore MB Enthusiast

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    The ATF fix will only work for a while.
    As suggested, far better to invest the effort required to replace the seal at a time of your choosing.
    How much is the temporary fix gunna save you vs. what it could cost when it's gone teets-up ?
     
  18. OP
    OP
    ricardo62

    ricardo62 Hardcore MB Enthusiast

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    your right but I will get my indie 2 fix it I don't trust myself
     

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