Reringing Old Geo 1.0 Engines

[buddhapapa]

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

[geozukigti]

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.

[candp]

glade to hear someone else is rebuilding the 1.0

[geozukigti]

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.