Ring wear

[aarolar]

Originally Posted by Merk

Did you measure the cylinder bore in 6 places like the Kohler manual shows?

Yes

What were the measurements if you did?

I cannot for the life of me find the paper I wrote the measurements on but they were all within spec, I would measure again but I already took my mic back to work.

Dud you hone the cylinder bore?

No and I know I am going to get reamed for this but I don't think I am I have talked to several prominent engine builders in my area and both suggested not honing if the cylinder walls look good.

Is it me or am I seeing up and down marks in the cylinder bore???? The up and down start about an inch down to the bottom on the cylinder wall. The piston skirt rides in that area. The cylinder may need bored if the marks are there. The engine will use oil unless the marks are removed.

Can you post of the piston????

[Vince_o]

IF It were me I would measure it in 6 places like Dale said. If the ring eng gap was with in spec, Id deglaze it and put new rings in it.

[ol'George]

Looking @ the bore, there are some hours on the previous rebuild.
I also would lightly hit it with a deglazer,and re ring.
Nothing to loose except the ring cost/gaskets.
later down the road if you are not happy, then other options are available.
I can't count the many times I just re ringed various engines,
and in all of them, the oil consumption dropped/power increased.
Be sure to wash the bore with hot soapy water, after the light deglazing.
ya gotta get the abrasive out of there.

[aarolar]

Rings came in today and I slipped them in to check endgap and have two different endgaps. The top ring measures .016 thou the middle measures .024 thou, both measured at the same point in the bore. The rings are stens which I thought were a good brand so what gives? Should have done like my father suggested and order 20 over rings and filed them to fit.

[Vince_o]

This is why we say to measure the bore, it may be egg shaped.

[dvogtvpe]

you really don't want to file down .020 to fit a .010 bore. as you file the end gaps and move the ends closer together you create higher tension areas to the ring pushing outward. and areas where there isn't as good of contact area since its no longer a perfect circle. I guess what I'm tring to say is its made to work or seal within a certian size of bore. the best thing you can do is have a nice round bore with no taper and a good crosshatch to get good ring seal. personally I would go .020 os. I'd guess you'll get about 2-3 seasons of mowing and it'll start huffing out the breather