Rebuilding 1983 engine

[Kududundee]

I had 2 spiders in my twenties , now in my fifties and bought a 1983, It looked great, not pristine but a nice looking car until the paint started bubbling and revealed a crappy resto job. Being the great dad that I am I gave it to my 18 year old son who is now busy to restore it. He disassembled it and currently is in the body shop to have all rust removed and repainted.
So here we are, we did a compression test on the engine and found one low cylinder, with the engine dissasembled it is time to purchase new bearings etc. i have done one of these motors before but is totally out of the loop what to check for and tolleraences etc.
So the first question is do we have a online engine manual to look up torque values , where to look for markings, and how to tell what size rings, main bearings, rod bearings etc to buy and what to look out for. It will be a great experience for him and what better place to do it than here on this forum.
I will give it over to him and he can ask questions and have fun with his project.
Thanks for having us

[vandor]

The factory manuals is posted somewhere online in PDF format, but I am not sure where. Try doing a Google search.

Very likely pistons and bearings are standard size. If oversize, the pistons will have the oversize stamped on their tops and the bearings on the backside close to one of the edges.

Take the block and crank to the machine shop so they can measure the bore and the crank to see if they are within spec. If the bores are good you can get away with only new rings, if not the engine will have to be bored out and new pistons installed. The crank will likely be fine and you'll be able to use stock size bearings.

This would be a good time to have the machine shop check the head and do a valve job. When they do that be sure they get the valve stem height to Fiat's spec, otherwise it could be difficult to adjust the valve clearances.

We sell and engine rebuild kit with pistons:

https://www.autoricambi.us/product/EN6- ... Tensioner/

[Kududundee]

Found manual

http://www.njfiats.org/joomla/images/st ... ntents.htm

Thanks, we already bought a gaske kit and a new waterpump etc. we only need bearings and rings.