There's plenty
of debate about the best way to deglaze cylinder walls to prepare them for new
piston rings. There are also plenty of questions.
The most common
one we're asked at Brush Research Manufacturing is this: "What abrasive and
grit type do I need for my honing tool?" Flexible hones provide a fast and
effective solution, of course, but answering this question isn't always so
simple. In short, the answer is this: "It depends". The cylinder and material
determine the tool specifications to select.
Choosing the
Abrasive
Fortunately,
picking the correct abrasive type for a Flex-Hone is straightforward. You'll want to use silicon carbide
for all cast iron cylinders and liners. For a Nikail liner, or in any aluminum
bore application, select an aluminum oxide abrasive instead.
Choosing the
Grit
The
most typical grits we see used for deglazing applications are 180 and 240 grit;
however, the range used runs from 120 all the way up to 400. We've even seen
some manufacturers of extreme-performance rings recommend 800 grits, or even
Levigated abrasives!
Corrosion, rust, or oxidation mean that
you'll probably want skew your grit selection a bit coarser. Use a finer grit
if you're running a high-performance engine with multiple tear downs and
surface finishes per year, or are using very thin rings.
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Re: How to Prepare Cylinder Walls for New Piston Rings
