A little backround...I have a 89 motor, that had 120,000 miles on it. It ran good when it was pulled, I decided to freshen it up with a stock rebuild, pretty much stock pistons with new rings, new bearings and a few other things. The machine shop honed the bores, installed the cam bearings, polished the crank, and checked the rods and mains. The reason I went with a "stock" rebuild was to save some money by reusing the pistons, and the rods, and pretty much whatever I could within reason.
I have gotten all the parts and got ready for assembly. I realized i had an issue when I was checking the ring gap on the Sealed Power E-471K rings ( stock size) and the ring gap was like .031-.032 when stock it should be like .011,.012. checked my bore size, and im looking at roughly 3.8140 in each cylinder bore. After a few days of realizing that either I or the machine shop screwed up (most likely me) im trying to find out what the next step is. This is the first time I have ever done this with a SC motor, and my father is a chevy guy, so he is kinda in the dark as well. I checked my piston diameter, and it looks like each pistion is like 96.10ish, give or take. My manual doesnt state acceptable wear limits on the pistons. I put the crank in and put the rings on one piston to see what it felt like,and if i took my thumbs on the relief of the piston and push it down or up, I can get the piston to move in the bore. I dont know if i have the wrong size rings, or I'm going to need rings that compenstate for the wear and the hone off the bore. I tried to find out exact specs on the rings, but it just gives widths.
So at this this point, i can think of a few things that are not right.
1. Wrong rings.
2. Too much wear on pistons.
3. Combinations of 1 and 2.
So I guess does anyone have any insight as to what I'm doing wrong, or what I have done wrong; and what I need to do to correct it?
I have gotten all the parts and got ready for assembly. I realized i had an issue when I was checking the ring gap on the Sealed Power E-471K rings ( stock size) and the ring gap was like .031-.032 when stock it should be like .011,.012. checked my bore size, and im looking at roughly 3.8140 in each cylinder bore. After a few days of realizing that either I or the machine shop screwed up (most likely me) im trying to find out what the next step is. This is the first time I have ever done this with a SC motor, and my father is a chevy guy, so he is kinda in the dark as well. I checked my piston diameter, and it looks like each pistion is like 96.10ish, give or take. My manual doesnt state acceptable wear limits on the pistons. I put the crank in and put the rings on one piston to see what it felt like,and if i took my thumbs on the relief of the piston and push it down or up, I can get the piston to move in the bore. I dont know if i have the wrong size rings, or I'm going to need rings that compenstate for the wear and the hone off the bore. I tried to find out exact specs on the rings, but it just gives widths.
So at this this point, i can think of a few things that are not right.
1. Wrong rings.
2. Too much wear on pistons.
3. Combinations of 1 and 2.
So I guess does anyone have any insight as to what I'm doing wrong, or what I have done wrong; and what I need to do to correct it?