504 rocker cover changed causes oil leak onto manifold
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  1. #1
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    Default 504 rocker cover changed causes oil leak onto manifold

    Hi froggers, I had this done to pretty up the engine bay
    apart form the smoke coming from the engine bay it's worked ok
    i wonder if the wrong rocker cover was used
    It's a 1975 ti and the replacemeNt cover had attachments on top
    these were removed
    Apart from these and two small bolts at the end to attach something else it looks tHe same as the old one
    thanks
    nc

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  2. #2
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    Forgot to mention I tightened up the bolts holding it on to the engine so they were pretty snug
    Not over tightened though
    thx
    nc

  3. #3
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    Most likely the tubular rubber seals on the bolts have fallen off or gone missing.
    Without these oil gets in to the welded on attachments on the top of the rocker cover then leaks through gaps in the welding onto the rocker cover then onto the exhaust. Graham


    Quote Originally Posted by nickc View Post
    Hi froggers, I had this done to pretty up the engine bay
    apart form the smoke coming from the engine bay it's worked ok
    i wonder if the wrong rocker cover was used
    It's a 1975 ti and the replacemeNt cover had attachments on top
    these were removed
    Apart from these and two small bolts at the end to attach something else it looks tHe same as the old one
    thanks
    nc

  4. #4
    1000+ Posts Beano's Avatar
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    Graham is correct.
    There are 2 rubber sleeves that go on the tappet cover bolts.... INSIDE the tappet cover. It's difficult to see where the oil comes out....it just goes straight onto the exhaust manifold.
    Plus, you should not overtighten these bolts or you warp the cover. I always use silicone on the tappet cover, though others say no-no.

  5. #5
    1000+ Posts Wildebeest's Avatar
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    Quote Originally Posted by nickc View Post
    Hi froggers, I had this done to pretty up the engine bay
    apart form the smoke coming from the engine bay it's worked ok
    i wonder if the wrong rocker cover was used
    It's a 1975 ti and the replacemeNt cover had attachments on top
    these were removed
    Apart from these and two small bolts at the end to attach something else it looks tHe same as the old one
    thanks
    nc

    Nickc,
    Any pictures of what you have done?
    Most of the advice given refers to a standard unmodified cover.

  6. #6
    1000+ Posts Beano's Avatar
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    Oops ! Sorry....I didn't read the original post properly......I'm not familiar with TIs

  7. #7
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    Many Thanks froggers
    I'll try and post a pic tomorrow morning
    nc

  8. #8
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    Default Pics

    Quote Originally Posted by nickc View Post
    Many Thanks froggers
    I'll try and post a pic tomorrow morning
    nc
    i didn't get the engine to the point of smokin oil on exhaust manifold
    but it seems to be coming from the left hand bolt on the rocker cover
    the manifold bolt on the far left only has been oiled
    nick

    504 rocker cover changed causes oil leak onto manifold-picture-009.jpg504 rocker cover changed causes oil leak onto manifold-picture-006.jpg

  9. #9
    1000+ Posts Beano's Avatar
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    In that case, my comments are relevant. If you've replaced the cover, you need 2 new rubber sleeves which go on the tappet cover bolts inside the cover.
    The oil is leaking out and going into the 2 housings which the tappet cover bolts go through. They're only spot welded on. The oil then exits down the bottom.
    You probably also need 4 new rubber seals for the top of each spark plug tube.
    By the way, I see you have a single circuit brake master cylinder.....not dual circuit. This means that if it fails, your brakes fail completely. It happened to me once.....luckily I was in a back street.
    If you ever have your foot HARD on the brake, like when you're stopped on a hill, and you feel the pedal going down slightly (and not coming up again) then you need to replace the master cylinder seals absolutely ASAP. You may not see the pedal do this....it's a feel. It may not just get progressively worse.....mine suddenly failed completely.
    The kit is not expensive.

  10. #10
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    Thx Beano

  11. #11
    1000+ Posts Wildebeest's Avatar
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    Nickc,
    There doesn't seem to be anything different on your tappett cover as mentioned in your first post. The air filter mount? bolt holes have been left open.
    The Ti brake m/cyl is as should be for that model?
    Also I see where some non Peugeot speaking person has been numbering the plug leads

  12. #12
    1000+ Posts Wildebeest's Avatar
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    Nickc,
    There doesn't seem to be anything different on your tappett cover as mentioned in your first post. The air filter mount? bolt holes have been left open.
    The Ti brake m/cyl is as should be for that model?
    Also I see where some non Peugeot speaking person has been numbering the plug leads

  13. #13
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    Oh, and your lower radiator hose also looks old....it appears to be bulging outside where it's clamped on.

  14. #14
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    Thx
    I had another mechanic look at it while i had the rear fuel filter replaced due to coughing engine
    he tells me there were 4 grooves in the rim of the head
    one near each corner as though clamped
    & that oil would certainly come from there
    these he filled with something that hardens like aluminium
    pretty strange as the oil leak onto the manifold only started when the rocker cover was replaced last week
    he used a full rocker kit to seal the unit
    will see how it goes
    I'll give the engine the clean up I've been meaning to do
    hopefully that'll be the end of it
    thx
    Nick

  15. #15
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    My latest theory is that the grooves were made when the head was sent away 10 years ago in preparation for the rebuild
    and that the grooves were accounted for at the time when the rocker cover was added
    but not when the replacement cover was added
    or that the grooves werent the cause but the hardened rubber around the rear bolt was
    all rubbers were replaced this time around
    thx for the suggestions on this
    Nick

  16. #16
    Budding Architect ???? pugrambo's Avatar
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    Quote Originally Posted by Wildebeest View Post
    Nickc,
    There doesn't seem to be anything different on your tappett cover as mentioned in your first post. The air filter mount? bolt holes have been left open.
    The Ti brake m/cyl is as should be for that model?
    Also I see where some non Peugeot speaking person has been numbering the plug leads
    early Ti i'd say Mr beast
    3 x '78 604 SL

    1 x 2018 3008

    1 x 2000 Citroen XM,

    1 x '98 306 GTi6 sadly sold

    1 x secret project

    1 x '98 406 STDT troop carrier and i don't care if it stinks, i don't sniff it's arse Death by wank tank

    1 x '99 406SV 5spd wagon, time to burn more fuel

    1 x 1994 605 SV3.0

  17. #17
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    Quote Originally Posted by pugrambo View Post
    early Ti i'd say Mr beast
    1974
    nc

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