Re: Suzuki piston ring problem.
.001 is 1 thousanth, .0001 is one tenth of a thousanth what are you using to measure .000001 of an inch ?
I have used optical comparators and some other special equipment but other than electronic equipment for radars and other micro-wave transmitters never tried to measure anything that small and I am not an engineer.
there is no suzuki of LA.
maybe your dealer isnt helping much.
but your desription is incredibly flawed at this point.
bore size is bore size and the piston ring end gap is controlled by that fact and that fact alone, piston size ,for end gap checking, is not only irrelevent its not even needed.
you say the hole that was bored shows the proper end gap, means that hole is the correct size.
as you dont indicate the other 3 are anything other than standard bore then standard rings will fit and again piston size is irrelavent.
if the bore was oversized and standard rings are used ring gap will be excessive.
however its posible the block was changed at somepoint and you may have an incorrect standard ring for that block.
years ago when we used wiesco and a few other manufactures forged pistons we had to bore the hole bigger than factory standards to allow for the difference in the skirt expansion charcteristics between cast and forged pistons.
now most of the piston skirts are cam ground to allow for the expansion difference.
what you may wish to do is hunt through the various years of the inline 4 suzuki and see if the standard bore size changed, its always possible it did.
never heard of not being able to supply rings only but who knows.
suzuki,like yamaha and a few others normally sells the piston,pin,clips,rings and pin bearing spacers and pin bearings all seperatly.
the days of fitting pins to pistons left about 30 years ago.
if you have ever run a CNC lathe or a CNC grinder you will know why.
I spent many years working for a suzuki dealer and never had an issue with a rebuild, spent many years working with a J/E dealership that specialized in engine reconditioning and did all the machine work inhouse.
had my own shop since 95 and I specialized in engine rebuilds using that former dealership for my mchine work.
other than 6 years in the USN as an FC and 6 years programming and setting up CNC lathes and mills this is about all I have done since I was 15 and I am almost 48 now.
over the years I have been factory certified to perform warrenty work for mercury/mariner,force,suzuki,tohatsu,honda and yamaha outboards. I am currently certified for yamaha outboards and Volvo and mercruiser sterndrives so I have seen about evey parts issue you can imagine.
finnished bore size is finnished bore size and the piston rings are made for that reguardless of piston or ring manufcture.
however you cannot mix rings between most piston manufactures unless they claim to be the same as OEM.
but that only has to do with the piston ring land desighn,square,keyston,semi-keystone, as not all pistons used the same groove design.
so I would start by looking at the factory service manual standard bore size, measure the actual bore size and see if its still within service limits. usually about .002" over standard bore size.
then place the ring squarly in the bore and measuer the gap at 3 loctions in the bore. near the top, in the middle and at the bottom of the bore.
should stay exactly the same all the way down
use the piston to seat the ring squarely in the bore for all measurements.
if the bore was egged or tapered and the hone used was either a dingle ball or a spring loaded glaze breaker it will hone the taper or egg back into the bore.
thats why I will only hone with a rigid stone set up that if I wish I can actually bore with.
but I think someone is feeding you a line at the parts counter.
