Well i have to do a demo on honing cylinders for shop class...so i was hoping i could get some input on it....im doin it on the honers with 3 stones...so need info on what grits to use and when to use them and techniques

 

460 I would suggest you go to the Hastings site the ring maker. Since no one hones cylinders to correct taper or out of round as was done years ago . I believe what you are looking for I would think is what grit stones to use to accomidate early ring seating on rerings, or to finish newly bored cylinders. Just do the search on Hastings and I believe you'll get the info you need up to date. Hope this helps.

 

Those hones are just like the ball hones. They won't fix a cylinder that is out of round or has taper, they just follow whats there. Probably does more bad than good.

 

Honing cylinders can get pretty complicated. A lot depends on the type of ring material being used (cast iron, moly, chrome, plasma, etc.). The crosshatch pattern is important. Your pattern will be applied by the relative RPM of the stones and the speed at which the stones are fed or drawn through the cylinders. It's important that the bores are undersized, then finished to spec in several stages, using progressively finer stones. Like mark a. said, generally honing will not correct an out-of round or taper situation, especially when doing it by hand. I personally don't hone my own unless it's just a light touch-up on a re-ring job, and only if the cylinders are within acceptable parameters. On the engines that I do, my machine shop uses a torque plate, which is bolted down to the block, taking the place of the heads. The main bearing caps are also torqued to specification. This distorts the block as if it were assembled. You would be surprised to see how much cylinder distortion there is when the head bolts are torqued to spec.
This article gives a little more detail on finishes and stones. It's geared more toward machine honing, but it will give you a good idea what's involved.
Also, Google "cylinder honing techniques" for more reading.


Pete

On edit: sorry, forgot the link- http://www.aa1car.com/library/honing98.htm