Howdy 120ers:

I posted a question around a month ago asking about the compression of the b18b in my 1967 122S. The psi numbers of two cylinders were around 40 less than the other two cylinders (around 180 psi). Following the helpful responses, I was able to pinpoint that the rings had lost efficiency of keeping high compression.

I took off the head and checked these cylinders. There were a couple or three barely seen rust-colored vertcal lines on the cylinder walls. I barely could feel these lines but they were raised instead of recessed. So that means that there are breaks on the ring(s)?

Soooooo....I need advice on the options what I should do:

1) Have the cylinders be deglazed/honed: I am hoping that these scratches are minimal and can be removed during the honing. And also that the cylinders are still perfectly round so that the same pistons can be used with new rings. (The engine has over 300k miles I believe.)

2) There is a long block b18 for sale on eBay for $350. Said to have 70k original miles. Does that mean it can be good for other 100k or so miles? Check out item #34801161618.

3) Also on eBay is fully rebuilt 135-hp b20 with D cam for $2950. It's more than the 122s I paid for but if the engine could last very long, worth the investment? Check item #300795120328

The SUs I have are already rebuilt, by the way. The head I have seems to be in good condition but I'm considering having hardened valve seats be installed.


Any thoughts, advice, etc much appreciated!

-DS