IMHO, if the engine needs to be rebored because one or more cylinders are worn
out of round, deeply scored, or otherwise damaged, yet the pistons and their
grooves are in good shape, I would be more inclined to have the cylinder, or
cylinders "sleeved". An automotive machine shop can install a sleeve for little
more than the cost of a cylinder re-bore, while saving you from buying a new
set of pistons, etc. Furthermore, the sleeve that Moss sold to me several years
ago was a Mazda OEM part. I assume that there
were some metallurgical improvements imparted to my 1974 British engine by the
use of a 1994 Japanese sleeve; only time will tell. The cost savings, however,
were substantial and immediate.
"Andrew B. Lundgren" wrote:
> Here is the blind leading the blind, I haven;t done it yet either but I
>might have read a little more.
>
> When you pull the head and pistons you will have to inspect the cylinders.
>Depending on the wear/groves/scoring you may be able to bore it out. If the
>damage is minimal/non-existant then you might get away with just new rings
>after a polishing. If it is more extensive then it will need to be bored out.
> If there are groves that are too deep to bore alone, then you will have to
>get sleeves for the cylinders and install them. Then depending on the size
>you get out of that you can do rings or new pistons.
>
> It all depends on the condition of the cylinders. I have never inspected
>them however and assumed I would have to take it to a pro...
>
> On Fri, 24 Aug 2001, Den's E-mail wrote:
>
> > Hi--
> >
> > My son and I are about to attempt the first engine rebuild of our lives --
> > the 1275 engine from my wife's beloved '71 Midget.
> >
> > I plan to get a book and video on the process but I'm curious about one
> > thing before I start: Should I automatically assume that I'll need to have
> > the block rebored or do I assume that I can just buy a new set of pistons
> > and will need to do nothing to the cylinder walls? How do I tell which
> > course to pursue?
Jim
microdoc@apk.net
1999 BMW R1100RT Very Black... of course
BMW RA #25289 MOA #89329
1972 Suzuki TS185 Dual Sport, Very sort of orange. For Sale
2000 Audi A4 Quattro Avant Very Silver
1960 MGA 1600 Very Red
1974 MGB-GT Damask Red (Very Burgundy)
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