George Bernard Shaw
wrote in message news:nse988patk4op0ute...@4ax.com...
<snip>
>>So, should I get a good home (Lisle 15000 maybe?) and hone the cylinders
>>to
>>size or is their some benefit to having the cylinder bored at a machine
>>shop? Depending on how everything else goes, I may just get a rebuilt or
>>remanufactured engine and swap it myself, spending $2k (maybe less) on an
>>engine is a lot better than $4k for an engine in this older car. It may
>>be
>>good for another 5 or 6 years if I can keep clear of the deer!
>>
>>Thanks!
>>
>>RogerN
>>
>You cannot afford the hone required to take out the damage to the cyl
>and fit an oversize piston. First oversize is likely 10 thou over -
>typical honing (with a VERY expensive Sunnen type fixed hone) is in
>the order of a couple thou. Get the block bored for oversize pistons,
>and finish honed to proper fit. A LOT cheaper than buying and using a
>fixed hone.
>
>Been a mechanic since 1969.
At the machine shop we used a home similar to this:
http://www.amazon.com/Lisle-LI15000-Engine-Cylinder-Hone/dp/B000GKIE4S
We relined tubes that were around 36" long with stainless steel pipe and
then honed, I don't remember for sure, around 100 thousandths out of this
stainless steel bore. This took a few hours to get it honed to size but we
were removing a lot of metal much more difficult than iron in around 36" of
cylinder. I removed 0.020" from my motorcycle cylinder in a fairly short
amount of time, maybe a half hour to 45 minutes with a lot of stopping to
measure several different places. I normally didn't hone because the boss
had more critical jobs to do so I stopped more often to see how fast
material was being removed, checked taper, measured diameter X and Y, etc.
I'm confident that I could get the bore the right size in a reasonable
amount of time with a hone like the Lisle, but, like Jon said, I don't know
the surface finish would be right and it looks like I can have it done
cheaper than the price of the hone not considering the time plus the price
for the heavy duty drill.
I had a buddy tell me he polished a cylinder in a model airplane engine, the
piston seized up, seems it needs them grooves for holding oil! I can see
that the finish could be important for proper break-in, wear, the ability to
hold oil in the "scratches".
RogerN