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Thread: Unseized hp 179

  1. #1
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    Unseized hp 179

    I managed to get the engine turning again with liberal doses of diesel. Turns over on the starter with no plugs in. Plugs in and starter doesnt want to turn. Rocker cover off and can see one of the push rods and valve arms? loose - becoming real tight when turning the engine with some bolts in the HB. Aplogies if terminology incorrect - not looked this far into an engine before. Iím going to get the head off and take a look but any ideas on whats going on?
    All comments apreciated as usual.cheers,
    D
    1957 88 Petrol (Chumlee)
    1960 88 Petrol (Darwin)
    1975 88 Diesel (Mutley)

  2. #2
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    Does the Dizzy spin when the motor is turned over.
    Also with the rocker cover off do the valves and push rods go up and down
    cheers chris


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  3. #3
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    Thanks for replying.
    Yes dizzy spins and valves and push rods go up and down. The third set of valves from the front ( from memory) either the first or second ( memory failing!) - the rocker arm and push rod is very loose and then becomes stiff around one and three quarters turn on the HB from tdc on cylinder one. This coincides with a much greater effort needed to turn the engine. I dont have anything on that engine, but looking at a generic diagram - i am struggling to guess whats going on.
    cheers,
    D
    1957 88 Petrol (Chumlee)
    1960 88 Petrol (Darwin)
    1975 88 Diesel (Mutley)

  4. #4
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    Rusted or bent valve stem. Try spraying the upper part of the valve stem liberally with penetrating oil and tapping the valve stem firmly with a small hammer. You can also take the manifolds off and spray stuff on the exposed stem there. Or just pull the head off and have a proper look.

  5. #5
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    Did these motors have the fibre timing gears ?
    My 186 had them, upgrade was to Alloy ones.
    Remember fibre ones caused problems, cant remember why.

    whitehillbilly

  6. #6
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    Quote Originally Posted by whitehillbilly64 View Post
    Did these motors have the fibre timing gears ?
    My 186 had them, upgrade was to Alloy ones.
    Remember fibre ones caused problems, cant remember why.

    whitehillbilly
    Fibre ones break,strip the teeth.
    Alloys ones are better but are often noisey.
    paul

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  7. #7
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    Uncharted territory

    Finally found some time to get the head off.
    first two cylinders evidence of rust , others look ok.At this point everything appears to turn fine.
    is this salvageable? Can anyone advise on what to do next please? I will get the head dismantled and take a look at the valves etc, but should I be squirting liberal doses of wd40 in the cylinders/ cleaning them somehow? This is not a getting it back on the road restoration, just using it around the place to collect wood etc.
    all comments gratefully received as usual.
    cheers,
    D
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    1957 88 Petrol (Chumlee)
    1960 88 Petrol (Darwin)
    1975 88 Diesel (Mutley)

  8. #8
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    Block looks good with a bit of emery, although would have to see where pistons have been sitting.
    The head looks like it has at least one and maybe several stuck or bent valves.

    You should remove the valves and see if bent, or maybe just stuck. You can tell a mildly bent valve as when you try to lap it, it will not lap all around the rim on the valve itself which sits in the seat..

    They are probably just stuck as the timing would have to be out for a valve to hit a piston and there would be marks on the piston .
    These engines have hydraulic lifters which need oil pressure to pump up . That is probably the reason that some pushrods are loose.
    It remains to be seen if they are OK after what looks like a long time. You may need a new set.
    Regards Philip A

  9. #9
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    How much effort and time do you wanna put into it?
    There's one running for $200 with a holden box, I know what I'd be doing.
    It would be a good learning curve for you to get it running of course so its not a waste of time in the end. http://www.gumtree.com.au/s-ad/north...179/1190480808

    Cheers Jim

  10. #10
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    Homestar is offline Super Moderator & CA manager Gold Subscriber
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    Looks like there's a valve stuck in the head - it isn't seated properly. Salvageable - yes, but with work and money, probably a fair bit depending on what you're wanting from it. Given that I couldn't give away a good running 202 a couple of years back, I'd chuck that one personally and find a runner for a carton of beer or something to be honest. The 179HP wasn't a great engine to start with really and not that sort after but you may be able to swap it for someone who's mates down the pub told them it is a rare or desirable variant.


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