Hi I have recently purchased a skoda 136m engine to go in my Estelle what's involved in the process of swapping out the 120l there is pictures to see what I'm working with I will need manifolds as the 120 I a 5 port head 

 

I wrote a piece on what was needed to convert a 136 to fit in an Estelle......looking at your engine without a dizzy it makes me think it may not have the necessary cut out in the end of the crank to work in an Estelle.......take a picture of the flywheel end of the crank and I'll tell you. If it doesn't then you'll need to take the crank out and get it machined. In the meantime I'll see if I can find the list of parts you need and what can be swapped over. 

Edited 9 September, 20196 yr by petergarforth

Hope the pictures are clear enough to see thanks 

 

Yes they certainly are......that isn't compatible....you need to get the crank machined unfortunately......there should be a cut out with a bearing in it for the input shaft to sit in. 

Here is a photo of what the end of the crank needs to look like.....the cut out is designed to have a 6202 bearing sat in it that the input shaft fits into 

Thanks for that picture so it requires like a spigot bearing would the crank out of my original 120l engine fit or would it be better to machine the136

Almost nothing is compatible from your old engine....the crank main bearings are a different size. As Kieran pointed out on Facebook the engine also doesn't have a fuel pump take off so you'll need to fit an electric pump. Inlet manifold is one of the main problems because the FWD ones won't work with RWD configuration as they are - if you know someone with a machine shop they can possibly cut one to sit at the right angle.....but RWD specific ones are super rare because only the Rapid 136 had them and they didn't sell many. You may also have problems with finding a pulley to fit if the crank is the later larger type.......see if your 120 crank pulley fits.....if it doesn't then there is no pulley to fit that uses the Estelle v belt configuration. Exhaust wise....you should be able to get a Favorit or Felicia manifold and modify it, or buy an aftermarket exhaust system from CZ.....but that would cost (£500+)

Yeah with the belt situation I was thinking about using the multi rib belt and modifying the pully on the alternator and using Felicia exhaust manifold I'm unsure on inlet manifold and possibly using bike carbs or Webber carbs on a custom banana manifold or using a stand carb and manifold with some possible angled spacer inbertween carb and manifold to sit the carb level I'm unsure what flywheel and clutch I need to get or do I just machine a hole through the flywheel 

If you want to keep the Estelle starter motor then all you need to do is change the ring gear over from the 120 to the 136 flywheel because the pitch of the teeth is very different......or at least that's all you need to do on the earlier type of Favorit and Felicia flywheels. You've picked a really difficult engine to do the conversion with....it would be a whole lot easier to buy a Favorit engine or earlier Felicia one and start from there! Machining the crank and converting everything to the wide belt is going to be a bit of a pain and more expensive in the long run. For parts, you could try advertising on the Facebook - Skoda Estelles for sale and wanted. 

out of intreast what was wrong with the original 120 engine?

Nothing wrong with the 120l I'm using it atm while I get the bits together to convert the other 136