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Thread: LWB refurbishment - based on marina 1.7 O series

  1. #11 Re: LWB refurbishment - based on marina 1.7 O series 
    club member Club Member dcunn's Avatar
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    Purely a thought, but removing the engine/box and getting overhaul quotes might be a way forward ?

    PS going back to your contacts with Ben Caswell some years ago it would be good to get a pic/pics of
    the car for the archive, my details are in Pitstop

    Rgds Dave Cunnington Club Archivist
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  2. #12 Re: LWB refurbishment - based on marina 1.7 O series 
    club member Club Member stevejgreen's Avatar
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    I am a great believer in PlusGas ever since using it during my engineering apprenticeship. It seems pretty rare these days except in industrial suppliers, but I think it’s available from Screwfix.

    But, in any event it is probable that you will have to dismantle the engine to clean up the bores.
    Patience is a virtue when dismantling a seized motor, haste will be your enemy.

    A new old stock engine is likely to need thorough inspection, one stuck piston ring could be Yuit downfall.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  3. #13 Re: LWB refurbishment - based on marina 1.7 O series 
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    Dave

    Having finally come to terms with the fact that the engine has to come out whatever happens, your suggestion is a good one.

    Assuming i have sorted the technology, please see photo attached

    Kind regards

    Mike

    E4758098-3745-409E-B8DC-94EF0D8E6C31.jpeg
    1700 OHC marina based LWB roadster. HPH 415V
    Kit purchased and collected from Plymouth circa 1988
    Build completed early 1992
    SORN for 15+ years until August 2020 + major rebuild / refurbishment commenced
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  4. #14 Re: LWB refurbishment - based on marina 1.7 O series 
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    Steve

    Thank you for the words of wisdom, my naive assumption was that if i took the plugs out i should be able to turn the crankshaft thus proving things were moving? Have i got that right?
    1700 OHC marina based LWB roadster. HPH 415V
    Kit purchased and collected from Plymouth circa 1988
    Build completed early 1992
    SORN for 15+ years until August 2020 + major rebuild / refurbishment commenced
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  5. #15 Re: LWB refurbishment - based on marina 1.7 O series 
    club member Club Member dcunn's Avatar
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    The engine will not turn if the pistons are seized in the bores, and as Steve says you could exacerbate the problem !

    The clutch is probably seized on as well, a standard Marina thing !

    Why not bite the bullet, get the engine/box out and have a professional decide whether the engine is salvageable or
    not before you throw more money at a new (but unknown) engine?

    Call me if talking would help you

    Thanks for the pic, one more for the archive collection

    Rgds DC
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  6. #16 Re: LWB refurbishment - based on marina 1.7 O series 
    club member Club Member stevejgreen's Avatar
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    Quote Originally Posted by mikeyp View Post
    Steve

    Thank you for the words of wisdom, my naive assumption was that if i took the plugs out i should be able to turn the crankshaft thus proving things were moving? Have i got that right?
    Taking the plugs out simply means that the position of the valves will not make the engine easier to turn and allow you po pour stuff down the bores.
    You don’t say how long you left the pistons to soak, for a badly seized engine using PlusGas, my favourite, it can be days, not minutes.

    You are rather trapped in a damned if you do, damned if you don’t, position. So taking a little more time is not wasted.

    My thoughts with any unknown engine, would be to strip it down, and rebuild it anyway. Good luck. It’s not a difficult job if you have an engine stand so that it’s at a good working height.
    MOC member since 05/97
    1984 Marlin Roadster SWB.
    1800TC, Unleaded ported head, stage 2 cam. Ford Type 9 gearbox, Dolomite Sprint rear axle fitted with MGF disc brakes.
    Three core radiator, Renault Clio vented front discs.
    The reasonable man adapts himself to the world; the unreasonable one persists in trying to adapt the world to himself. Therefore all progress depends on the unreasonable man.

    Loads of Marlin Reference can be found documents here or there.
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  7. #17 Re: LWB refurbishment - based on marina 1.7 O series 
    frequent forum contributor Club Member greyV8pete's Avatar
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    I would be wary of trying to turn a “siezed” engine in case there are any valves stuck in the valve guides. In addition to the initial long soaking of the pistons with oil or plusgas I would get the head off first to check the valves are free and then get access to the pistons. Provided they are not at top dead centre then a block of hardwood on top of each in turn and a smart whack with a hammer may well be enough to get things free. As previously mentioned this may crack a piston ring but at least you can then continue a major strip down if necessary. However if things do free off this way then it will save you a major engine out job.
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  8. #18 Re: LWB refurbishment - based on marina 1.7 O series 
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    Thanks Dave
    Now quite excited that engine has to come out, I feel the need for an engine stand purchase! It simplifies a lot of decisions and means I can get on with suspension and seat refurb. As you say It will be worth asking someone to take a look at it, I will take you up on the offer of a chat nearer the time.

    I need to clear some space in my bijou workshop. Unfortunately I don’t have a garage so major work will have to commence in the spring.
    1700 OHC marina based LWB roadster. HPH 415V
    Kit purchased and collected from Plymouth circa 1988
    Build completed early 1992
    SORN for 15+ years until August 2020 + major rebuild / refurbishment commenced
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  9. #19 Re: LWB refurbishment - based on marina 1.7 O series 
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    Many thanks - the engine is well and truly seized after 3 months of trying various remedies to no avail, so it will be engine out I think.
    1700 OHC marina based LWB roadster. HPH 415V
    Kit purchased and collected from Plymouth circa 1988
    Build completed early 1992
    SORN for 15+ years until August 2020 + major rebuild / refurbishment commenced
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  10. #20 Re: LWB refurbishment - based on marina 1.7 O series 
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    Re engine stands. I inherited a three-wheeled one. It was not very stable nearly dumping my B ser engine on the floor!! I put a crossbar by the single wheel and put blocks under it. Now it is stable even with a 2.5l Landrover diesel on it. Lots of info on the forum about getting engines and gearbox out. The easiest I think is to drop it out and lift the car off. use a little trolley to pull it out, Don't forget the speedo cable, don't ask! Yes, it does need to be high. Hire an engine crane to lift it. Lots of big solid wood blocks. If it is in the open why not get a Gazebo? Any cover helps.
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