ares650

I just spoke to a local performance shop that builds several kits for rsx's (DC5 - K20) in the south florida area. i would like to see what u guys think about honing FRM sleeves. they told me that u dont have to hone FRM sleeves if they are clearanced to the right size. Even when installing new pistons and new rings. as long as the cylinder is clearanced correctly, there is no honing involved. the only time honing is required is when u have deep scratches running vertical on the sleeves from the top to the bottom. what do u guys think of this.

Chiovnidca

You don't want to hone them unless you have to. It's very easy to gouge them up. As long as the size, taper and out of round are within spec, new rings will seat just fine.

Ekasey

i would always hone new sleeves. The idea of the crosshatch pattern that you always see on sleeves is for the rigns to seat. There are different angles on that pattern used for different ring materials so they seat properly. The sleeves they used may be made out of a material that doesn't require honing. You should hone your sleeves with what is called a rigid flex hone that will develop the cross hatch pattern but consult with ane experinced machine shop like bensons to figure out what pattern is right for your rings

ares650

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by eLusive ek4 &raquo;</TD></TR><TR><TD CLASS="quote">i would always hone new sleeves. The idea of the crosshatch pattern that you always see on sleeves is for the rigns to seat. There are different angles on that pattern used for different ring materials so they seat properly. The sleeves they used may be made out of a material that doesn't require honing. You should hone your sleeves with what is called a rigid flex hone that will develop the cross hatch pattern but consult with ane experinced machine shop like bensons to figure out what pattern is right for your rings</TD></TR></TABLE>

Yea I know that is the case with iron sleeves, But I have never seen the crosshatch pattern on the FRM honda sleeves. I would like to get a for sure answer.

Chiovnidca

From Hondas march 2001 service news:

Honing Fiber-Reinforced
Metal Cylinders
All S2000s and 90 and later VTEC and Si Preludes
have cylinder liners made with fiber-reinforced
metal (FRM). You don't need to hone FRM
cylinder liners unless the cylinder has deep
vertical scratches that run the full length of the
bore. But if the cylinder liners have light-colored
spots or flaking, you must replace the engine
block.
If you need to hone FRM cylinder liners, follow
these guidelines:
Use only a rigid hone (not a ball hone) with
GC-600-J or finer honing stones for nonferrous
metals. Make sure you use an oil type honing
lubricant.
Keep the pressure between 200 and 300 kPa (2
and 3 kg-cm2, 29 and 43 psi). Hone between
45 and 60 rpm using a 60-degree cross-hatch
pattern.
Do not hone more than 20 cycles. Clean the
honing stones every five cycles.
After you're done honing, thoroughly clean
the engine block of all metal/abrasives. Wash
the cylinder bores with hot, soapy water, then
dry and oil them immediately. Never use
solvent; it will only redistribute the grit on the
cylinder walls.
It's OK to have some light vertical scoring and
scratching of the cylinder bores if it isn't deep
enough to catch your fingernail, and if it
doesn't run the full length of the bore. But if
the scratches are too deep, bore and hone the
cylinders to the next oversize specification.

RudeLude

thsi post is up from the dead.....lol.
i'm about to install some of those mahle gold series pistons in my h22a with frm sleeves. according to this post i shouldnt need to hone my cylinders, but what if i'm installing new rings? the pistons are 87.00mm bore, but they come with new rings, if my cylinders are in good shape i dont need to hone?