Who Can Rebuild and ReJet a Zenith Carby In Sydney or Nearby

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AustHaflinger
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Who Can Rebuild and ReJet a Zenith Carby In Sydney or Nearby

Post by AustHaflinger »

As the topic says "Who Can Rebuild and ReJet a Zenith Carby In Sydney or Nearby".

I need to have my Zenith 32NDIX correctly rejetted and rebuilt but my local carby specialist cannot get the required jets so looking for someone in the Big Smoke who would be able to do the work.

Thanks

Garry
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heinkeljb
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by heinkeljb »

Gary,

Worst case, you will have to buy all the jets and gaskets and take it apart yourself if you can't find some one to do it for you. No more daunting than taking you front hubs off really!

John
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ogdenenterprise
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by ogdenenterprise »

Hi Garry,
Try Tony Hrleja in Melbourne regarding parts he may have some in stock, when I had carb problems he explained step by step how to set it up, which did cure the problem I was having. If you ask he may do the rebuild for you.

Dave
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Rick K
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by Rick K »

Hi Garry

Carburettor Service Co. in Burwood (Sydney) have re-built 4 Zenith and 2 Weber Haffy carbys for me, and have gotten to know them quite well. They have rebuilt haffy carbys for others as well. They have Fuel Miser kits for the Zenith (or at least they did as of a couple of years ago). They have been around for a generations- likely the best in the business. Hope that helps.

Rick
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

John - Thanks but I want it done properly and I don't know what jets I have that are OK and what ones I would need to get and would need someone to advise.

Dave - thanks for the advice.
Rick K wrote:Hi Garry

Carburettor Service Co. in Burwood (Sydney) have re-built 4 Zenith and 2 Weber Haffy carbys for me, and have gotten to know them quite well. They have rebuilt haffy carbys for others as well. They have Fuel Miser kits for the Zenith (or at least they did as of a couple of years ago). They have been around for a generations- likely the best in the business. Hope that helps.

Rick
Thanks Rick - exactly what I am after, I will give them a call.

Cheers

Garry
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

Hi Rick - I rang the Carburettor Co and they knew all about my issue as my local company had been in contact with the day before after parts. Unfortunately like my local guy they can rebuild the carby which they said is quite simple but they are unable to provide the required jets etc.

So as John suggested, I will need to disassemble the carby and remove all the jets noting the size and anywhich do not match the Haffie version will need to be replaced. I will need to source these from Tony Hrleja (thanks Dave) or Haflinger Technik and the put the carby with new parts in for the rebuild.

I just hope all the effort will be worth it - I am thankful that I have all the Haffie jet sizes so if I can get them there shouldn't be any further problems.

Cheers

Garry
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by Rick K »

Sorry Garry- hoping the lead was a quick fix for you. At least you know who will do a good job of rebuilding your carby once you get the right jets. Do they still have the Fuel Miser service kits available for the Zenith? I just checked a spare kit and it dosnt contain any jets at all.

Rick
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

Rick The tip was a good one and I had a long chat - I am just a bit surprised that aussie builder cannot source jets. However I worked out what I need and have emailed a business in the US that does provide jets for the Unimog and Pinzgauer and Haflinger Technik to see what they can provide - I will also try Tony Hrleja if I have no luck.

I have the handbook for the Solex I currently have and it explains that the primary determinant for carby size selection is not engine size but cylinder size. The Unimog that my carby came off has a cylinder size of 366cc where my haffie has cylinders of 381cc so maybe the carby will work OK with the Mog jets in it. So if I have no joy locating suitable Haffy jets I might just bung it on and see how it goes - putting the carby on and taking it off is easy and quick so nothing to loose really but I will wait to see the outcome of my enquiries.

Cheers

Garry
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pathfinder700ap
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by pathfinder700ap »

Hello!

Just a few additions to this topic: Yes, the Zenith 32 NDIX has been used for several different cars, such as Haflingers, Unimogs, Porsche 356s etc... While it seems that the upper main housing can be adapted to any of these vehicles by changing the jets etc., the lower housing with the throttle flaps was different for each application. In this lower cast iron part, you find small "transition bores" (I actually don't know the correct english translation, but they are called that way because they support the transition from idling to higher engine load). The number and the positioning of these transition bores was chosen individually for each application and can, of course, not be changed.

Also, when you think about the jets, don't forget that the upper housing also contains many other features such as the accelerator pump. The piston of this pump system as well as the included pump and suction valves are also available in different versions (while only one of them was fitted to the Haf). Same thing with some other parts in the carb.

I don't want to say that a Unimog carb won't work on a Haflinger engine, but just be aware that there are many more things that can be different for different vehicles beside the jets.


Kind regards,
Constantin
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by HaffyHunter »

Hi Garry,
Cylinder capacity is part of the equation but cam profile and cylinder head flow are bigger factors. That said, the stock Haf motor is quite forgiving in terms of carby configuration and I've seen a Series 1 engine that functioned on a Tillotson diaphram style snowmobile carb.

Cheers,
Steve
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

pathfinder700ap wrote:I don't want to say that a Unimog carb won't work on a Haflinger engine, but just be aware that there are many more things that can be different for different vehicles beside the jets.

Kind regards,
Constantin
Hi Constatin,

Yes I had similar concerns when I was unable to track down a Haffie carby. I am a bit of a babe in the woods on these matters so took the advice of Jim LaGuardia in the US who indicated that the Unimog 404 version was closest to the Hafinger version and the worst was the Porsche version. He indicated to me that only the jets and the venturi need to be changed to end up with the Haffie version and that is what I am trying to achieve.

I guess only time will :)

Cheers

Garry
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

HaffyHunter wrote:Hi Garry,
Cylinder capacity is part of the equation but cam profile and cylinder head flow are bigger factors.
Steve
Steve - yes you are quite right - cylinder capacity is an over simplification but does take into account the issues you mentioned.

Cheers

Garry
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by Rick K »

Garry, if you get stuck, i have a spare zenith carby from a Haffy which should be simple to recondition. Cheers. Rick
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

Thanks Rick - I will keep it in mind if I get stuck.

Cheers

Garry
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

I have had my carby refurbished and purchased a new inlet manifold. Time to fit between Xmas and New Year but like most jobs has not gone to plan.

Like all repro parts the manifold does not quite fit and required a little modification, then when the taking up the slack on one of the nuts of the inlet manifold on one of the heads the stud stripped out - not when torquing it down but when simply taking up the slack. I was not using a big socket but a little 1/4" drive and holding it by the head and not the handle.

Image

Inspection of the thread on the stud showed only freshly broken metal on three threads so it looks like the other threads were already broken.
Image

Then I realised the stud had an insert on it so the stud hole had previously been damaged and repaired.
Image

Because it has already been repaired with a threaded insert, a helicoil will most likely not be a suitable repair due to the difference in the stud size and the size of the hole. Unfortunately most places now only stock helicoils and being the Christmas/New Year break it will most likely take a while to locate something suitable.

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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by heinkeljb »

Gary,

I can think of two alternative repairs you could have done.

The best would obviously be taking the head off and getting the hole welded up, then drilling and re-tapping for the correct size.

The second would be to drill and tap the hole as it stands and then put threaded bush in - similar to a helicoil, but rather than a spiral of hardened wire, the bush would be solid metal.

John
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

heinkeljb wrote:The second would be to drill and tap the hole as it stands and then put threaded bush in - similar to a helicoil, but rather than a spiral of hardened wire, the bush would be solid metal.

John
Yes - that is what was in there. They are hard to find locally and am just about to start ringing around but I am not hopeful. :(

Garry
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by heinkeljb »

Looks like you will have to make your own bush then. A piece of threaded bar or a bolt of the right O/S diameter. Drill the correct size hole down the middle, tap it to take the 8mm stud.

Get the hole really clean using brake and carb cleaner and an air line to blow it clean and dry! Use plenty of thread locking fluid. If you put a hack saw blade cut across the end of your threaded insert, you can use a screw driver to make sure it is wound in deep enough.

I have a hole in the joint between the right hand side carb preheat pipe and the carb mounting block. I understand that they are brazed in place. I can buy a replacement pipe, but then would have the hassle of trying to line up the two mounting flanges, and braze the pipe in. So at the moment it has an exhaust pipe bandage with paste and a jubilee clip trying to seal it! As it is only a small hole and right in the "V" between the two pipes,i will live with it until the summer and then decide how to deal with it.

John
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by walderse »

Garry,
With the head already in hand, the very best repair would be to have the head cleaned and the damaged hole TIG welded back to its original solid state. Then have it drilled and retapped using either original M8 hardware or even going up one step using an M8/M10 repair stud in a larger freshly tapped M10 hole. One possible source is:

http://www.vwheritage.com/vw_spares_Stu ... 118032.htm

Hope this helps.
Take care.

Jim Molloy
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http://www.northwestmogfest.com
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AustHaflinger
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Re: Who Can Rebuild and ReJet a Zenith Carby In Sydney or Ne

Post by AustHaflinger »

Thanks to everyone for your contributions. Because the insert that the M8 stud sat in was already M10 and stripped I had to drill out and go even larger. So now I have a threaded hole M12 1.5 hole. There is about 2-3mm of metal still around the outside of the hole so should be OK.

I tried to make a M12/M8 stud out of a M12 1.5 bolt but it was hi tensile and my basic taps and dies were not able to cut the metal. So today I made a M12/M8 insert out of mild steel which my basic tools could deal with. I will attempt a fit tomorrow.

The next time the head is off I will get it welded up so that I can go back to a standard M8 stud.

The problems that I have stem from the repro inlet manifold. It fits the inlets Ok but not to the exhaust and trying to jiggle it to fit everywhere is the issue. I will drop the exhaust off the engine and bolt the manifold up the the cylinder heads. With the exhaust off the engine I should be able to wiggle the exhaust and the heater pipes on the inlet manifold to fit without damaging the studs.

Jim - thanks for that link.

Cheers

Garry
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