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Thread: Diagnostic advice 1.4 petrol

  1. #51
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    Hi Moderator Thank you for correcting that mess
    For some reason this reply below went beserk and did that wot you see ?? Please deleat the crap and leave the text if possible. I do not seem to be able to do it !
    Jaahn

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    Last edited by jaahn; 29th January 2018 at 11:19 PM.

  2. #52
    Fellow Frogger! Big Frog's Avatar
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    Thanks Jaahn for your thoughts.
    At present awaiting the mechanic to get back to me about his assessment, not sure when he was looking at it in his workflow and other customers etc.
    Then I can see what he has and hasn't considered or looked at
    Cheers
    Steve

    Here are some screen grabs of a head gasket replacement video off YT, for what it's worth.
    Shows water and oil passages, oil as David pointed out must go thru the internal galleries as there is no external pipe.
    Diagnostic advice 1.4 petrol-block.jpg
    Diagnostic advice 1.4 petrol-block2.jpg
    Diagnostic advice 1.4 petrol-head.jpg
    Last edited by Big Frog; 30th January 2018 at 02:03 PM.

  3. #53
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    Quote Originally Posted by jaahn View Post
    Hi Moderator Thank you for correcting that mess

    Jaahn
    . . .
    74 D(very Special) >>Rejuvenation Thread<<
    08 C5 X7 HDi very Noir



    "Déesse" Roland Barthes, 'Mythologies', 1957

    The Déesse has all the characteristics of one of those objects fallen from another universe that fed the mania for novelty in the eighteenth century and a similar mania expressed by modern science fiction: the Déesse is first and foremost the new Nautilus.

    (Umberto Eco [Ed], The History of Beauty, Rizzoli, NY, 2004)

  4. #54
    Fellow Frogger! Big Frog's Avatar
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    Hi All,
    It has been a little while since I posted regarding the smoke belching Berlingo.
    I had taken it to a local mechanic who had some time ago done some diagnostic work on a stuck throttle body, and thought he could help. After two weeks at his shop they advised that it was "buggered". I collected the car and the mechanic said he thought it could only be the rings and I should source a second hand motor - they didn't charge me for this appraisal and advice.

    So back to the home workshop.
    I dismantled all the parts of the air cleaner, intake manifold, throttle body and associated breathers on the rocker cover and their friends and could see no evidence at all of oil entering via the breather, into the intake.
    So confronted with a replacement engine and no clear lead on the problem, my assumption was it could be the valve stem seals or at the worst the rings, and had nothing to lose by investigating further.

    If it was possible I would have changed the valve stem seals with the head on (which is possible using either string in the cylinder or compressed air to hold the valve in place). However the Berlingo rocker gear is held in place with the cylinder head bolts.

    With the head removed, the head gasket showed no problems as suspected.
    There was common to all the inlet passages a oil type stain leading down from the valve stem area on the inlets.(see picture)
    Diagnostic advice 1.4 petrol-img_20180213_101527.jpg

    I took this as an indication of oil being sucked into the cylinders via the stem seals, surmising that they had been damaged by the back pressure from the blocked cat.
    I had a conversation with a well regarded Cit mechanic by phone for guidance, he suggested that to definitely eliminate another cause that the pistons should be removed and inspected seeing that the head was off. With the engine still in the car the sump cover was removed, oil pump removed, and pistons pushed up and out.
    The rings appeared to be in good condition, none broken etc, and the cylinder bores were not marked, no lip etc. A check of the piston end gap on the compression rings did show them to be worn according to the published numbers.

    Bores were then honed lightly with a cross hatch pattern to help bed new rings.
    (This took a bit of time, a timber plug was made and placed at the bottom of the cylinder, grease was them smeared around the plug and cylinder wall to prevent any particles falling onto the crank below whilst honing lightly. The cylinders were then each carefully leaned with clean cloths damp with kero and then the plug drawn up and out and more cleaning.)

    Carbon cleaned from heads, valves and pistons and ring grooves.
    New rings sourced & installed.
    Head and block surfaces cleaned and checked for flatness - all good.
    Valves were lapped.
    New valve stem seals installed.
    Cylinder head bolt holes well cleaned.
    New head gasket and new head bolts installed.
    Rest of parts re assembled.
    Fired it up with the exhaust down pipe off (the exhaust pipe is very oily from the previous condition)
    Runs great - no smoke at all, ran it till to operating temp and hot water going thru radiator.
    Previously the engine was missing terribly and had no power, horrible rough running.
    Installed exhaust system, some smoke out exhaust due to residue in pipes.
    After a run to town and back (30 kms ish) zero smoke from exhaust, engine running very smoothly no sign of previous missing or rough running, good power has returned.
    Will replace the 'run in type' oil in about 500kms.

    Thanks for everyones input and interest, hope this is of assistance to someone in the future.

    Steve
    Last edited by Big Frog; 6th March 2018 at 03:46 PM. Reason: tpyo
    David S, JoBo, dimistyle and 1 others like this.

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