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Old 30-06-2019   #46
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Re: 126 650cc engine transplant..

Ok so I dropped the existing lump out today and swapped over the shorter 500 driveshafts, luckily they were the 24/25 mm type......so after a not so fun day elbows deep in gearbox oil nearly everything is back together and ready for trial fitment today. I’m hesitant weather to fit it yet as I haven’t got my new bearings for the alternator so it would be fitted without it and the alternator and that section of tin fitted afterwards.......thoughts on that gents please?

Also from your vast experience which is better the 500 dizzy cap setup or the 126 twin spark coil?

I have taken pics which I will post I’ve just not had the time. 10 hours grafting yesterday in the sun kind of broke me yesterday....
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Last edited by The Whitakers; 30-06-2019 at 08:47. Reason: Chubby fingers
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Old 30-06-2019   #47
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Re: 126 650cc engine transplant..

Unless you have 4 foot arms with about 3 joints in each, I would NOT recommend that you try and fit the alternator and housing after the engine is in the car. Among other things, unless you get the shims in the right order/position, the fan could make contact with the housing. Also, the nuts at both ends (alternator one end, fan at t'other) of the alternator shaft have to be TIGHT. I would suggest that you fit the gearbox, have that all bolted up, have the engine all ready to have the alternator to be fitted, and then fit the engine with the alternator in situ. Due to a problem I had with the ignition light on my new (Abarth style) instrument cluster I had to fit my spare alternator (turned out it was the fact that I had fitted a LED ignition light and not a 'bulb' ignition light)---I had the engine out, the alternators swapped and the engine back in in one long working day---and I am not in the first flush of my youth!
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Old 30-06-2019   #48
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Re: 126 650cc engine transplant..

OOps, sorry, forgot to answer your 2nd. As both systems still need 'spark timing control' from the distributor, I don't think it makes much difference. I have been advised that you can still use a 'Hall effect' ignition module in the distributor with the 'flat hat' cover when using the 'waste-spark' coil.
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Old 30-06-2019   #49
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Re: 126 650cc engine transplant..

Thanks Hobbler...ok so Iíve refitted the gearbox...

The engine is complete bar the alternator which Iím waiting bits....

Iíve removed the warm air pipe from the tin ware to the car, Iíll worry about that later.....

Iíve run a cable from the dash to the starter motor, where the ignition is in the middle of the dash Iím mounting a push start button. My ignition is on the column. Itís a nice chrome unit do shouldnít look too out of place...

Gone for the twin spark unit so swapped that over too and removed the conventional coil...

Iím knackered.....Iím well out of shape to work at this pace......

Iíll post some pics tomorrow....

Thanks for all the responses and advice, wine is my friend tonight....
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Old 01-07-2019   #50
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Re: 126 650cc engine transplant..

Ok a few pics of the gearbox and final drive during strip, clean and rebuild..
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Old 01-07-2019   #51
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Re: 126 650cc engine transplant..

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Old 01-07-2019   #52
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Re: 126 650cc engine transplant..

Not the prettiest engine I've rebuilt but in a week of strip, clean, order parts and get back together it'll do...Ö


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Old 01-07-2019   #53
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Re: 126 650cc engine transplant..

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Old 01-07-2019   #54
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Re: 126 650cc engine transplant..

Hopefully the delivery of parts for the Alternator will arrive today so it can be rebuilt and the engine completed....


Carb had a rebuild and was fitted to the engine last night.....


I have mentioned what I have done as a temporary with the starter although when I have more time I will complete a set up to use the pull handle like the standard set up. this will comprise of a simple pull switch, spring and cable located under the access hatch at the rear of the tunnel in the car.....


The car intake duct, as this now fouls the starter.... it's been binned for now due to time constraints....I do have a plan in mind but i'll document that after I've been away.....


Need to sort the leccy out due to the dynamo to Alternator swap.....


Not leaving much time for a shake down am I?! however when I rebuilt my beetle that took 14 years (I fell out with it for quite a while) it's shakedown was getting drove to Belgium....that had all the suspension and brakes modified and uprated too...Ö..I made sure I had plenty of breakdown cover and tools...Ö.
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Old 01-07-2019   #55
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Re: 126 650cc engine transplant..

It lives!!!.......well sort of...

Couldnít get the starter to engage, tried another starter....better but not right.....sat having a head scratch and another brew......so when the blatantly obvious slapped me round the face I bolted the engine main earth on and guess what......jeez.....

So it runs but didnít let it run for too long as there is no alternator belt on yet so no cooling......

Tomorrowís job is to swap out the starters again for the one Iíve cleaned up and do the alternator wiring.....one thing Iíve noted is that the exhaust from the back of the engine is fouling the bodywork so Iím assuming the 126 zaust is different to the 500? I may leave it on and notch the body as it will be better for reconfigure of the car hot air intake....

Iíll take some more pics tomorrow.....
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Old 01-07-2019   #56
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Re: 126 650cc engine transplant..

Its quite common when swapping to 650 engine and exhaust for it to hit the rear cross member. You can get a spacer that sorts it out. Have a look at this thread.

https://www.fiatforum.com/500-classi...omorrow-2.html
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Old 02-07-2019   #57
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Re: 126 650cc engine transplant..

Quote Originally Posted by The Whitakers View Post
.one thing Iíve noted is that the exhaust from the back of the engine is fouling the bodywork so Iím assuming the 126 zaust is different to the 500? I may leave it on and notch the body as it will be better for reconfigure of the car hot air intake....
The shape of the rear exhaust pipe is different and I had the problem that I think you refer to.

https://www.fiatforum.com/500-classi...ml#post4253287
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Old 02-07-2019   #58
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Re: 126 650cc engine transplant..

Quote Originally Posted by fiat500 View Post
The shape of the rear exhaust pipe is different and I had the problem that I think you refer to.

https://www.fiatforum.com/500-classi...ml#post4253287


Yes the forth pic in your post is what I refer to....


I will double check the other points also, thank you....
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Old 04-07-2019   #59
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Re: 126 650cc engine transplant..

Ok so it's in and running. Early indications show that it has totally transformed the driving experience of the car!....the extra power and the sychro box is fantastic...Ö.


I still have a few jobs to do like the alternator wiring to tidy as I used the dynamo regulator as a junction point, the warm air duct etc....just small stuff really....


It's been quite a battle in 10 days to collect, strip, rebuild, remove, swap, refit and get running including 4 separate orders to parts suppliers.....


I do have to thank everyone for their persistence and input through my rambling posts on here, it wouldn't have happened so quick without you all....


So I'm going to drag it to Cornwall on Friday night for a week of nipping and bobbing so I'll report back on how it performed....


When I return I will post up valid points of things encountered during the swap which hopefully will give a little guidance and understanding to other.....


Thanks again Gents..


Rob
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Old 07-07-2019   #60
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Re: 126 650cc engine transplant..

Guys really struggling for signal where I am, the car has had a long run and is hot but not over heating but itís developed a misfire.....whatís the tappet gap on an A1 engine as I set them to standard 495cc setting!?
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