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Thread: Haflinger engine failure after running backwards

  1. #21
    Join Date
    Sep 2010
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    Quote Originally Posted by 101RRS View Post
    I am not game to go back to the guy as he is already dirty on me for suggesting the damage was caused by a broken valve spring or sticky/dropped valve.
    Pretty much what I was trying to say about people being inaccurate. They cannot deal with having their beliefs challenged. You'll see it every day on this forum, and please, I include me in this assessment, unlike some others.
    [SIGPIC][/SIGPIC]



    Real stupidity beats artificial intelligence every time. Sir Terry Pratchett

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris

  2. #22
    Join Date
    Jan 1970
    Location
    Kallangur, Brisbane
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    934
    I have my doubts as to whether you could persuade a Dynastart to run backwards.
    + 2016 D4 TDV6

  3. #23
    Join Date
    Sep 2010
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    Dandenong Ranges.
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    Quote Originally Posted by 101RRS View Post
    However I can run my engine without a dizzy cap or rotor.

    Here is my engine running

    YouTube

    Garry
    OK, that's fascinating.

    Couple of questions.
    1; Will it start like that?
    2; What happens if you open the throttle?

    I'm tipping the answers will be;

    1; No, and
    2; It will stall.

    I have seen engines "diesel" before, and I suspect that yours is doing just that. Happy to be proven wrong, as I love to learn.

    One thing though; will it do that backwards? I'll bet not.
    [SIGPIC][/SIGPIC]



    Real stupidity beats artificial intelligence every time. Sir Terry Pratchett

    2000 D2 TD5 Auto: Tins
    1994 D1 300TDi Manual: Dave
    1980 SIII Petrol Tray: Doris

  4. #24
    Join Date
    Jan 1970
    Location
    Canberra
    Posts
    15,633
    Quote Originally Posted by johntins View Post
    OK, that's fascinating.

    Couple of questions.
    1; Will it start like that?
    2; What happens if you open the throttle?

    I'm tipping the answers will be;

    1; No, and
    2; It will stall.
    1. Yes it will start (how do you think I got it started ) - answer turn the ignition key so the starter motor cranks the engine.

    2. When you open the throttle it will rev fine and the car drives fine - have driven it like that - and no it is not dieselling.





    Garry
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

  5. #25
    Join Date
    Jan 2008
    Location
    Nowra NSW
    Posts
    3,756
    Haffie motors will run and last fine if not driven to their limits all the time,
    They are well known to drop valves if driven hard .
    Not possible for a Haffie motor to run backwards for any lenght of time.
    Raising a rocker cover oil return pipe and therefore the oil level in the rocker cover reduces valve trouble under duress.
    Think of early Volkswagon Kombi vans..........people would load them up a drive them over the Nullabour in 35 degree heat at 100 kph and they would drop a valve.
    Same motor in a Volkswagon beetle never had the dropped valve issue.
    The little motor in the Haffie works hard.
    Every time I have seen one driven hard sooner or later goes bang.
    Ex aussie army ones with the little belt driven governor on them and working with the extra air flow and oil cooling would last forever if the oil level and changes were kept up to it.
    The motor design If memory serves me correctly as standard is 643cc and 24 bhp single thoat carby and 27 bhp dual thoat carby at about 4600 rpm which is about as hard as you really want to go on a 1950s design push rod engine meant for a scooter when designed and that horse power was never meant to be sustained on a scooter, let alone later uses for that motor in a
    Puch car and Halfinger.
    If driven as designed.......great motor.........if driven to its limits or hotted up its not so good.
    The haffie motor wass designed in the 1950s ,in the haffie was governed and only had a 30 odd mph road speed.
    That never happens these days as the haffies are driven to suit more modern times in countrys with hot climates and more open spaces than Austria.
    Govenors were fitted to the haffie motors so they could not go bang
    How many owners run the belt on the govenor?...............none.
    Aussie army testing for our climate suggested the cooling mods for aussie army models.

  6. #26
    Join Date
    Jan 1970
    Location
    Canberra
    Posts
    15,633
    Good background - the car in question is not on the road and is undergoing a rebuild and the engine was just being started in the vehicle in the workshop. The owner is in denial on what occurred - also a concern the owner has not looked for, nor found the bit from the broken spring. Hopefully it fell out when the rocker cover was taken off but he did not realise the spring was broken.

    InkedBroken Spring_LI.jpg
    REMLR 243

    2007 Range Rover Sport TDV6
    1977 FC 101
    1973 Haflinger AP700
    1971 Jaguar V12 E-Type Series 3 Roadster
    1957 Series 1 88"
    1957 Series 1 88" Station Wagon

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