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<blockquote data-quote="swampratt" data-source="post: 4343957" data-attributes="member: 15054"><p>I have passed up a few machine shops after asking them a couple simple questions.</p><p></p><p>What surface finish do you use on cast rings?</p><p>What surface finish do you use on moly rings?</p><p>A couple shops told me they use the same finish for all rings.</p><p>And it was coarse 240 grit.</p><p></p><p>NO thanks.</p><p>[URL unfurl="true"]https://www.yellowbullet.com/threads/for-those-that-freshen-inspect-ball-hone.530261/[/URL]</p><p></p><p>Another very popular machine shop around here would use a torch to heat the rod small end and turned all the connecting rods blue 1/2 way down the beam.</p><p></p><p>Those rods are junk after that move!</p><p></p><p>Another shop I asked what cylinder wall clearance will you put on my cast pistons and he stated 1/2 a thousandths.</p><p>UUUUMMMMM NO. This was an engine that was meant to be hammered on for racing.</p><p>I wanted a minimum of .0025" and .0035 would be fine also.</p><p></p><p>I got the finished ready to clean and assemble block and found a dark spot in 1 cylinder.</p><p>It was below where the piston top would be in the block.</p><p></p><p>That dark spot was tiny but i seen it about the size of a period and I picked at it with a thumb tack.</p><p></p><p>It was a rust pit that went all the way into the water jacket.</p><p></p><p>Junk block.</p><p>You must clean and look really close at everything or you would chase your tail when something bad shows up.</p></blockquote><p></p>
[QUOTE="swampratt, post: 4343957, member: 15054"] I have passed up a few machine shops after asking them a couple simple questions. What surface finish do you use on cast rings? What surface finish do you use on moly rings? A couple shops told me they use the same finish for all rings. And it was coarse 240 grit. NO thanks. [URL unfurl="true"]https://www.yellowbullet.com/threads/for-those-that-freshen-inspect-ball-hone.530261/[/URL] Another very popular machine shop around here would use a torch to heat the rod small end and turned all the connecting rods blue 1/2 way down the beam. Those rods are junk after that move! Another shop I asked what cylinder wall clearance will you put on my cast pistons and he stated 1/2 a thousandths. UUUUMMMMM NO. This was an engine that was meant to be hammered on for racing. I wanted a minimum of .0025" and .0035 would be fine also. I got the finished ready to clean and assemble block and found a dark spot in 1 cylinder. It was below where the piston top would be in the block. That dark spot was tiny but i seen it about the size of a period and I picked at it with a thumb tack. It was a rust pit that went all the way into the water jacket. Junk block. You must clean and look really close at everything or you would chase your tail when something bad shows up. [/QUOTE]
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