504 injection pump oil leak
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Thread: 504 injection pump oil leak

  1. #1
    Fellow Frogger!
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    Default 504 injection pump oil leak

    Hi all,
    My 504 has an oil leak from the injection pump. It is leaking from around the shaft as can be seen in the attached photo. The spring, brackets, washer and so on have been removed just for the purpose of finding the leak. The car has not been started since an engine rebuild, and this is the first time I have put oil in the pump. Is there a way to repair this and/or get to the seal without removing the whole pump assembly?
    Thanks in advance.
    504 injection pump oil leak-imageuploadedbytapatalk1427258331.165750.jpg

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  2. #2
    1000+ Posts BIGRR's Avatar
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    Has the pump been overhauled?
    Is the leak large (it may settle down after the oil wets the seals).
    Is it engine oil or the new pump oil ( I think the pump sees both).
    Did you overfill the pump?

    My Ti has 350k km on it and it does not leak (it may have a very very small seep).

    Good luck
    Present fleet:-
    Peugeot 93' 205 Gti 16v
    Peugeot 73' 504 Ti from new
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    Previous fleet:-
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    Renault 72' 16TS from new
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    "Be reasonable do it my way!"


  3. #3
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    Thanks BIGRR,
    Pump not overhauled.
    Defiantly oil I put in the pump, because, oil has been in the sump for some time. Only now I have put oil in the pump has it started to leak.
    It is possible I put too much oil, but I used the overflow hole to check the level.
    As the car has not been started yet, what about if I start the engine and keep an eye on it? What would be the difference between taking it apart now or after it's been restarted?

  4. #4
    1000+ Posts BIGRR's Avatar
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    If the pump has not been overhauled, why is it leaking now. Did it leak before or did it not have oil in it?

    I would give it a bit of time and see if it settles down. It will not hurt to run it a couple of hours (providing the oil does not squirt out.
    Present fleet:-
    Peugeot 93' 205 Gti 16v
    Peugeot 73' 504 Ti from new
    Peugeot 08' 407 Hdi Coupe from new

    Previous fleet:-
    Peugeot 95' 605 Sv
    Peugeot 92' 205 Gti
    Renault 72' 16TS from new
    Renault 69' 10
    Renault 71' 10s
    Renault 68' 10 from new

    "Be reasonable do it my way!"


  5. #5
    1000+ Posts Mike Tippett's Avatar
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    That's a weird one, and I agree with the wait and see idea. If the seal needs replacement, the pump will probably have to come out, which is a job but not a terrible one.
    1966 Peugeot 404 Coupé Injection post-restoration reassembly underway!
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  6. #6
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    hi tonch 504, if I remember correctly the end cover plate which houses your wax stat/choke setup can be removed on vehicle by undoing the 10mm mounting bolts and drawing off the cover plate complete with choke assembly.this will leave the rear support bearing on the end of the shaft,but you will lose all of your oil out of the pump.I think the rear housing has a couple of locating dowels on it but can,t remember the sealing method,I think it is just machined mating surfaces (been twenty years since I had one apart) I hope this is of assistance. jim

  7. #7
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    hi tonch504, sorry forgot about fast idle/choke mechanism behind cover plate which I think has a lever and fork to lign up when refitting. jim

  8. #8
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    Thanks everyone, I have never seen this injection system work, but I am assured it works fine. I think, as the engine has not run yet I might just leave it until it's running, in case there are other problems which require disassembly to resolve.
    BIGRR likes this.

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