Does it cause overheating or not???
Ok, I have been through the mill talking with mechanics, engine shops,
machine shops, and Hesco regarding this question. My 258 short block is at .040 over bore. I'm getting ready to take it to a guy for a rebuild to get this puppy back on the road. It will be configured with the 4.0L head and the Mopar MPI kit at completion. A lot of you have seen my cylinders posted on the web and note they do not have a ring ridge so there is a possibility they may not need a bore to .060 over but here's the question, if they do: I have been told by several mechanics that .060 over will cause the engine to run hot or hotter than normal. I checked with JeepsRUs and they said .060 will be no problem even with the 4.0L head I checked with Hesco and they said the same, no problem. I just talked to a engine remanufacture shop in LA who told me they don't send out anything over .030 because it will run hot. Am I making myself stupid over this? Why is there no consistency with this question? Bottom line, will it run hot with .060 over and degrade the life of the engine quicker? Thanks, |
Re: Does it cause overheating or not???
I've never heard it will run too hot, but wouldn't running anything
over thirty for fear the cylinder would blow out, it's just too thin. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ William Oliveri wrote: > > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to .060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, |
Re: Does it cause overheating or not???
I've never heard it will run too hot, but wouldn't running anything
over thirty for fear the cylinder would blow out, it's just too thin. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ William Oliveri wrote: > > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to .060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, |
Re: Does it cause overheating or not???
I've never heard it will run too hot, but wouldn't running anything
over thirty for fear the cylinder would blow out, it's just too thin. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ William Oliveri wrote: > > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to .060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, |
Re: Does it cause overheating or not???
I've never heard it will run too hot, but wouldn't running anything
over thirty for fear the cylinder would blow out, it's just too thin. God Bless America, ßill O|||||||O mailto:-------------------- http://www.----------.com/ William Oliveri wrote: > > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to .060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, |
Re: Does it cause overheating or not???
"William Oliveri" <wuji@bigvalley.net> wrote in message news:c5hrvp$1ui58$1@ID-193866.news.uni-berlin.de... > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to ..060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, > The engine won't run hotter because of this. Think of it this way: your engine is at .040 overbore now. Going to .060 is only .010 per side of the cylinder. The average human hair is .004. Many of the newer engines are designed with thinner cylinder wall castings to save weight, but at the expense of not being able to bore the block as much, if at all. The 32 valve Cadillac Northstar engine is one that is not recommended to be overbored at all, and some of the 4.0 Jeep engines being made into stroker engines are being bored out .120 (after sonic testing). If you are concerned about it, you can pay someone to sonic check the block for cylinder wall thickness, but in all honesty, a 9-1 compression 258 isn't going to have a problem with a .060 overbore. Chris |
Re: Does it cause overheating or not???
"William Oliveri" <wuji@bigvalley.net> wrote in message news:c5hrvp$1ui58$1@ID-193866.news.uni-berlin.de... > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to ..060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, > The engine won't run hotter because of this. Think of it this way: your engine is at .040 overbore now. Going to .060 is only .010 per side of the cylinder. The average human hair is .004. Many of the newer engines are designed with thinner cylinder wall castings to save weight, but at the expense of not being able to bore the block as much, if at all. The 32 valve Cadillac Northstar engine is one that is not recommended to be overbored at all, and some of the 4.0 Jeep engines being made into stroker engines are being bored out .120 (after sonic testing). If you are concerned about it, you can pay someone to sonic check the block for cylinder wall thickness, but in all honesty, a 9-1 compression 258 isn't going to have a problem with a .060 overbore. Chris |
Re: Does it cause overheating or not???
"William Oliveri" <wuji@bigvalley.net> wrote in message news:c5hrvp$1ui58$1@ID-193866.news.uni-berlin.de... > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to ..060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, > The engine won't run hotter because of this. Think of it this way: your engine is at .040 overbore now. Going to .060 is only .010 per side of the cylinder. The average human hair is .004. Many of the newer engines are designed with thinner cylinder wall castings to save weight, but at the expense of not being able to bore the block as much, if at all. The 32 valve Cadillac Northstar engine is one that is not recommended to be overbored at all, and some of the 4.0 Jeep engines being made into stroker engines are being bored out .120 (after sonic testing). If you are concerned about it, you can pay someone to sonic check the block for cylinder wall thickness, but in all honesty, a 9-1 compression 258 isn't going to have a problem with a .060 overbore. Chris |
Re: Does it cause overheating or not???
"William Oliveri" <wuji@bigvalley.net> wrote in message news:c5hrvp$1ui58$1@ID-193866.news.uni-berlin.de... > Ok, I have been through the mill talking with mechanics, engine shops, > machine shops, and Hesco regarding this question. > > My 258 short block is at .040 over bore. I'm getting ready to take it to a > guy for a rebuild to get this puppy back on the road. It will be configured > with the 4.0L head and the Mopar MPI kit at completion. > > A lot of you have seen my cylinders posted on the web and note they do not > have a ring ridge so there is a possibility they may not need a bore to ..060 > over but here's the question, if they do: > > I have been told by several mechanics that .060 over will cause the engine > to run hot or hotter than normal. > I checked with JeepsRUs and they said .060 will be no problem even with the > 4.0L head > I checked with Hesco and they said the same, no problem. > I just talked to a engine remanufacture shop in LA who told me they don't > send out anything over .030 because it will run hot. > > > Am I making myself stupid over this? Why is there no consistency with this > question? > > Bottom line, will it run hot with .060 over and degrade the life of the > engine quicker? > > Thanks, > The engine won't run hotter because of this. Think of it this way: your engine is at .040 overbore now. Going to .060 is only .010 per side of the cylinder. The average human hair is .004. Many of the newer engines are designed with thinner cylinder wall castings to save weight, but at the expense of not being able to bore the block as much, if at all. The 32 valve Cadillac Northstar engine is one that is not recommended to be overbored at all, and some of the 4.0 Jeep engines being made into stroker engines are being bored out .120 (after sonic testing). If you are concerned about it, you can pay someone to sonic check the block for cylinder wall thickness, but in all honesty, a 9-1 compression 258 isn't going to have a problem with a .060 overbore. Chris |
Re: Does it cause overheating or not???
And after all this, I am guessing that until someone A) funds a
scientific study, or B) you take the plunge, no one will know, so follow your gut man. Just have the spare $$ to pick up a used or rebuilt motor after the fact, in case it all goes south. -- -- Joe Pribe NC jpribe 'at' nc.rr.com <you know the drill jegp 'at' hotmail.com < at is really @ ---- I Love My O|||||||O TJ "c" <c@me.org> wrote in message news:e80fc.45019$YC5.44874@twister.rdc-kc.rr.com... | | "William Oliveri" <wuji@bigvalley.net> wrote in message | news:c5hrvp$1ui58$1@ID-193866.news.uni-berlin.de... | > Ok, I have been through the mill talking with mechanics, engine shops, | > machine shops, and Hesco regarding this question. | > | > My 258 short block is at .040 over bore. I'm getting ready to take it to | a | > guy for a rebuild to get this puppy back on the road. It will be | configured | > with the 4.0L head and the Mopar MPI kit at completion. | > | > A lot of you have seen my cylinders posted on the web and note they do not | > have a ring ridge so there is a possibility they may not need a bore to | .060 | > over but here's the question, if they do: | > | > I have been told by several mechanics that .060 over will cause the engine | > to run hot or hotter than normal. | > I checked with JeepsRUs and they said .060 will be no problem even with | the | > 4.0L head | > I checked with Hesco and they said the same, no problem. | > I just talked to a engine remanufacture shop in LA who told me they don't | > send out anything over .030 because it will run hot. | > | > | > Am I making myself stupid over this? Why is there no consistency with | this | > question? | > | > Bottom line, will it run hot with .060 over and degrade the life of the | > engine quicker? | > | > Thanks, | > | | The engine won't run hotter because of this. Think of it this way: your | engine is at .040 overbore now. Going to .060 is only .010 per side of the | cylinder. The average human hair is .004. Many of the newer engines are | designed with thinner cylinder wall castings to save weight, but at the | expense of not being able to bore the block as much, if at all. The 32 valve | Cadillac Northstar engine is one that is not recommended to be overbored at | all, and some of the 4.0 Jeep engines being made into stroker engines are | being bored out .120 (after sonic testing). If you are concerned about it, | you can pay someone to sonic check the block for cylinder wall thickness, | but in all honesty, a 9-1 compression 258 isn't going to have a problem with | a .060 overbore. | | Chris | | |
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