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boler76 10-18-2012 08:58:29 184.151.61.70 Report to Moderator	Now my question was, will heating the block increase or decrease the bore ID ? [Reply]   [No Email]
ZANE 10-18-2012 17:04:03 98.83.72.128 Report to Moderator	Re: sleeve installation revisited in reply to boler76, 10-18-2012 08:58:29   Now don't get your panties in a wad but the last set of sleeves I installed in a Perkins diesel I used a propane BBQ grill bottle with a valve I bought to fill small propane bottles for my little propane torch. I was outside in the wide open spaces and I wrapped a big rag around the sleeve and covered the bottome of the sleeve with the rag and then inverted the propane bottle and sprayed liquid propane into the open end of each sleeve one at the time till they were frosted over completely and they sleeves almost dropped into the bore. I did have to drive one in about the last two inches but it went easy. Be extra careful not to be close to any sort of spark or engine running etc. Please don't try this. I don't want anybody to get hurt!!!!!!!!!!!!!!!!!!! Zane [Reply]  [No Email]
TheOldHokie 10-18-2012 15:58:02 108.8.18.125 Report to Moderator	Re: sleeve installation revisited in reply to CharnerL, 10-18-2012 08:58:29   teddy52food said: (quoted from post at 16:54:02 10/18/12) Yes , but it expands in all directions. So it expands at pi (3.1416) so the ID actually gets bigger. Because most metals expand linearly in all direction there is no need to worry about PI. The linear rate of expansion for cast iron is .0000059/in/degree. If you have a 1" hole in a chunk of iron raising the temperature of the piece 1 degree will increase the diameter of the hole .0000059" x 1", a 2" hole would increase .0000059" x 2", a 3" hole increases .0000059 x 3", and so on. TOH This post was edited by TheOldHokie at 16:45:49 10/18/12 2 times. [Reply]  [No Email]
TheOldHokie 10-18-2012 10:40:41 108.8.18.125 Report to Moderator	Re: sleeve installation revisited in reply to Jimbo's 8n, 10-18-2012 08:58:29   tn8n said: (quoted from post at 12:27:35 10/18/12) i believe you're right. i've heard of people working around electricity accidentally shorting their wedding ring. when it got hot they couldn't get it off. i remember it's opposite of what you'd think but the metal expands inward and outward. if you heated a pipe the od would get larger and the id would get smaller. No - a hole in a piece of metal expands outward when the metal is heated. For cast iron it increases roughly .0006"/in of hole diameter for every 1000 degrees F you increase the temperature of the metal. To expand the 3" hole in your block enogh for a .001 interference (shrink) fit you need to raise the temperature about 400F. Good luck heating an engine block that much. TOH This post was edited by TheOldHokie at 10:42:36 10/18/12. [Reply]  [No Email]
boler76 10-18-2012 11:25:23 184.151.61.70 Report to Moderator	Re: sleeve installation revisited in reply to TheOldHokie, 10-18-2012 10:40:41   well I guess that answers my question, Thanks [Reply]  [No Email]
JCinKY 10-18-2012 09:58:40 209.149.164.204 Report to Moderator	Re: sleeve installation revisited in reply to boler76, 10-18-2012 08:58:29   My first thought was that it would definitely shrink the bore, the metal would have to expand toward the center...only place for it to go. But why would you want to heat a bolt or the bolt hole to remove a frozen bolt, both would expand thus making it harder to remove. My old school rule of thumb is if you want to get something into or out of a hole, heat it. [Reply]  [No Email]
JCinKY 10-18-2012 09:14:47 209.149.164.204 Report to Moderator	Re: sleeve installation revisited in reply to boler76, 10-18-2012 08:58:29   Deleted Scratch that my physics were off. The inner diameter of your cylinder will get BIGGER. Thats because the atoms will expand and get further apart from one another. But it all depends on the thickness and amount of heat applied how drastic the expansion will be. Freezing the block would make the atoms contract and pull together, thus shrinking the bore. This post was edited by JCinKY at 09:27:42 10/18/12. [Reply]  [No Email]
tn8n 10-18-2012 09:27:35 166.214.117.187 Report to Moderator	Re: sleeve installation revisited in reply to JCinKY, 10-18-2012 09:14:47   i believe you're right. i've heard of people working around electricity accidentally shorting their wedding ring. when it got hot they couldn't get it off. i remember it's opposite of what you'd think but the metal expands inward and outward. if you heated a pipe the od would get larger and the id would get smaller. [Reply]  [No Email]
teddy52food 10-18-2012 13:54:02 184.94.175.179 Report to Moderator	Re: sleeve installation revisited in reply to tn8n, 10-18-2012 09:27:35   Yes , but it expands in all directions. So it expands at pi (3.1416) so the ID actually gets bigger. [Reply]  [No Email]