At the machine shop where I once worked, we would reline cylinders used to
extrude melted plastic for record (remember them?) production. Anyway, the
stainless steel liner was pressed in the cylinder, welded, then honed to
size, don't remember how much honing but I'm estimating at least 0.1" or so.
Anyway in those days I had a dirt bike (RM250) that I bored out with the
hone, worked great as far as I could tell. I honed it to 0.0005" larger
than the minimum size.
This hone was the type with the rack and pinion feed, positive feed feeling.
While honing you could feed taper in the bore, out of round, and when it
cleaned up, nothing like those springy break cylinder hones.
Anyway, remember my economy car with the bad engine problem, the 2002
escort? Instead of spending $4k on having a mechanic replace the engine
with a Jasper remanufactured engine, I'm considering getting something else
but working on the Escort. So I'm thinking pull the engine, checking out
the damage and probably doing an overhaul myself. Since the valve seat
destroyed #4 cylinder I'm thinking get a remanufactured head with the valve
seat dropping problem fixed and honing out the cylinders for some pistons of
the minimum size that the cylinder walls clean up.
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!
9 years ago