Reringing Old Geo 1.0 Engines

In regard to an earlier posting on reringing old geo motors that idle poorly because of their age, my question is how one would determine whether such a reringing was possible or would it be wiser to rebore and install oversized pistons? I have never rebuilt a motor where I did not rebore and install larger pistons, although the idea might be a possibility under the correct conditions.

Thanx,
buddhapapa

I, personally, take my engine block to a shop. I don't have the proper tools to check if the cylinder is still round. If it's still round, they usually charge around $8-$10/hole for honing, or if it needs to be bored, around $20/hole. When you have the engine out, I would recemmond having it cleaned, and the head gasket surface machined. Should cost around $75 for a 3 cylinder. my 4 cylinder cost $100 to get re-conditioned. Rings are around $60 also. If you really want to do it right, you can also install new crank and connecting rod bearings. If you don't know how to use plastigauge, I wouldn't recemmond doing this yourself. You could easily spin a bearing. Engine rebuilding is very tedious, and sensitive to even .001" differences.

glade to hear someone else is rebuilding the 1.0

A rebuilt 1.0 will run excellent. When they're new, they run really smooth, and have a good amount of pep. You never really realize how much power you've lost until you rebuild and start out fresh.