Exhaust Manifold - '98 TJ of course
#21
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
When you shut the engine off after a hard run, what would you
think happens to the exhaust valve about 3" away from the major leak?
bowgus wrote:
> Yeah ... I'd also like to know , first of all how "cold air", or any air for
> that matter, could possibly enter a (pressurized by the engine firing)
> exhaust manifold ... geez .. that's like saying cold air can enter via the
> tailpipe, make it's way through the exhaust sytem to the exhaust manifold
> wher it will ... and this I'd really like to understand ... damage "the
> valves". Now, in my youth I have reduced back pressure on a few autos and
> run them hard thereby burning exhaust valves ... maybe this is what you are
> thinking? Or maybe you are thinking that the O2 sensor might somehow be
> misled by the cracked manifold thereby changing the mixture? Look there is
> no argument here ... just a question as to how this works ... I am always
> eager to learn more about the jeep ...
>
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:CUaTb.3858$1O.2264@fed1read05...
>
>>"Irish Redneck" <seeayeemm@hotmail.com> wrote in message
>>news:opr2pb0bviy2qpcc@netnews.insightbb.com...
>>
>>>On Sun, 1 Feb 2004 08:15:19 -0800, Jerry Bransford <jerrypb@mecox.net>
>>>wrote:
>>>
>>>
>>>>A cracked exhaust header should be replaced since it can damage the
>>>>valves
>>>>by letting cold air in through the crack.
>>>>
>>>
>>>please explain to me the science behind this 'fact'.
>>
>>Do your own research if you want to argue against what I said that I stand
>>behind...which on the surface sure seems like is you're itching to do.
>>
>>--
>>Jerry Bransford
>>To email, remove 'me' from my email address
>>N6TAY, PP-ASEL
>>See the Geezer Jeep at
>>http://members.***.net/jerrypb/
>>
>>
>
>
>
think happens to the exhaust valve about 3" away from the major leak?
bowgus wrote:
> Yeah ... I'd also like to know , first of all how "cold air", or any air for
> that matter, could possibly enter a (pressurized by the engine firing)
> exhaust manifold ... geez .. that's like saying cold air can enter via the
> tailpipe, make it's way through the exhaust sytem to the exhaust manifold
> wher it will ... and this I'd really like to understand ... damage "the
> valves". Now, in my youth I have reduced back pressure on a few autos and
> run them hard thereby burning exhaust valves ... maybe this is what you are
> thinking? Or maybe you are thinking that the O2 sensor might somehow be
> misled by the cracked manifold thereby changing the mixture? Look there is
> no argument here ... just a question as to how this works ... I am always
> eager to learn more about the jeep ...
>
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:CUaTb.3858$1O.2264@fed1read05...
>
>>"Irish Redneck" <seeayeemm@hotmail.com> wrote in message
>>news:opr2pb0bviy2qpcc@netnews.insightbb.com...
>>
>>>On Sun, 1 Feb 2004 08:15:19 -0800, Jerry Bransford <jerrypb@mecox.net>
>>>wrote:
>>>
>>>
>>>>A cracked exhaust header should be replaced since it can damage the
>>>>valves
>>>>by letting cold air in through the crack.
>>>>
>>>
>>>please explain to me the science behind this 'fact'.
>>
>>Do your own research if you want to argue against what I said that I stand
>>behind...which on the surface sure seems like is you're itching to do.
>>
>>--
>>Jerry Bransford
>>To email, remove 'me' from my email address
>>N6TAY, PP-ASEL
>>See the Geezer Jeep at
>>http://members.***.net/jerrypb/
>>
>>
>
>
>
#22
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
When you shut the engine off after a hard run, what would you
think happens to the exhaust valve about 3" away from the major leak?
bowgus wrote:
> Yeah ... I'd also like to know , first of all how "cold air", or any air for
> that matter, could possibly enter a (pressurized by the engine firing)
> exhaust manifold ... geez .. that's like saying cold air can enter via the
> tailpipe, make it's way through the exhaust sytem to the exhaust manifold
> wher it will ... and this I'd really like to understand ... damage "the
> valves". Now, in my youth I have reduced back pressure on a few autos and
> run them hard thereby burning exhaust valves ... maybe this is what you are
> thinking? Or maybe you are thinking that the O2 sensor might somehow be
> misled by the cracked manifold thereby changing the mixture? Look there is
> no argument here ... just a question as to how this works ... I am always
> eager to learn more about the jeep ...
>
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:CUaTb.3858$1O.2264@fed1read05...
>
>>"Irish Redneck" <seeayeemm@hotmail.com> wrote in message
>>news:opr2pb0bviy2qpcc@netnews.insightbb.com...
>>
>>>On Sun, 1 Feb 2004 08:15:19 -0800, Jerry Bransford <jerrypb@mecox.net>
>>>wrote:
>>>
>>>
>>>>A cracked exhaust header should be replaced since it can damage the
>>>>valves
>>>>by letting cold air in through the crack.
>>>>
>>>
>>>please explain to me the science behind this 'fact'.
>>
>>Do your own research if you want to argue against what I said that I stand
>>behind...which on the surface sure seems like is you're itching to do.
>>
>>--
>>Jerry Bransford
>>To email, remove 'me' from my email address
>>N6TAY, PP-ASEL
>>See the Geezer Jeep at
>>http://members.***.net/jerrypb/
>>
>>
>
>
>
think happens to the exhaust valve about 3" away from the major leak?
bowgus wrote:
> Yeah ... I'd also like to know , first of all how "cold air", or any air for
> that matter, could possibly enter a (pressurized by the engine firing)
> exhaust manifold ... geez .. that's like saying cold air can enter via the
> tailpipe, make it's way through the exhaust sytem to the exhaust manifold
> wher it will ... and this I'd really like to understand ... damage "the
> valves". Now, in my youth I have reduced back pressure on a few autos and
> run them hard thereby burning exhaust valves ... maybe this is what you are
> thinking? Or maybe you are thinking that the O2 sensor might somehow be
> misled by the cracked manifold thereby changing the mixture? Look there is
> no argument here ... just a question as to how this works ... I am always
> eager to learn more about the jeep ...
>
>
> "Jerry Bransford" <jerrypb@mecox.net> wrote in message
> news:CUaTb.3858$1O.2264@fed1read05...
>
>>"Irish Redneck" <seeayeemm@hotmail.com> wrote in message
>>news:opr2pb0bviy2qpcc@netnews.insightbb.com...
>>
>>>On Sun, 1 Feb 2004 08:15:19 -0800, Jerry Bransford <jerrypb@mecox.net>
>>>wrote:
>>>
>>>
>>>>A cracked exhaust header should be replaced since it can damage the
>>>>valves
>>>>by letting cold air in through the crack.
>>>>
>>>
>>>please explain to me the science behind this 'fact'.
>>
>>Do your own research if you want to argue against what I said that I stand
>>behind...which on the surface sure seems like is you're itching to do.
>>
>>--
>>Jerry Bransford
>>To email, remove 'me' from my email address
>>N6TAY, PP-ASEL
>>See the Geezer Jeep at
>>http://members.***.net/jerrypb/
>>
>>
>
>
>
#23
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
Doesn't even have to be hot, if the hole is large enough. Reminds
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
#24
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
Doesn't even have to be hot, if the hole is large enough. Reminds
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
#25
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
Doesn't even have to be hot, if the hole is large enough. Reminds
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
me of my young hot rod days, when the temptation was too great for some
of us to fire a new engine, and if we did it before the headers were
bolted on, that it was guaranteed to warp ever exhaust valve:
http://www.----------.com/dragster.jpg
God Bless America, ßill O|||||||O
mailto:--------------------
Roy J wrote:
>
> When you shut the engine off after a hard run, what would you
> think happens to the exhaust valve about 3" away from the major leak?
#26
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
>>
>> please explain to me the science behind this 'fact'.
>
> Do your own research if you want to argue against what I said that I
> stand
> behind...which on the surface sure seems like is you're itching to do.
>
> --
--
no, not in any way do i want to argue. i am truly sorry to come across in
an aggressive manner. i have just seen the 'cold air harms valves' so many
times since i was a kid... i just wanted to get to the bottom of where the
idea (fact!) came from. ya know? its one of those things that i don't
believe is possible, but anything is possible!
thanks!
#27
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
>>
>> please explain to me the science behind this 'fact'.
>
> Do your own research if you want to argue against what I said that I
> stand
> behind...which on the surface sure seems like is you're itching to do.
>
> --
--
no, not in any way do i want to argue. i am truly sorry to come across in
an aggressive manner. i have just seen the 'cold air harms valves' so many
times since i was a kid... i just wanted to get to the bottom of where the
idea (fact!) came from. ya know? its one of those things that i don't
believe is possible, but anything is possible!
thanks!
#28
Guest
Posts: n/a
Re: Exhaust Manifold - '98 TJ of course
>>
>> please explain to me the science behind this 'fact'.
>
> Do your own research if you want to argue against what I said that I
> stand
> behind...which on the surface sure seems like is you're itching to do.
>
> --
--
no, not in any way do i want to argue. i am truly sorry to come across in
an aggressive manner. i have just seen the 'cold air harms valves' so many
times since i was a kid... i just wanted to get to the bottom of where the
idea (fact!) came from. ya know? its one of those things that i don't
believe is possible, but anything is possible!
thanks!
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William Oliveri
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08-23-2003 11:52 AM
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