Valve Seat Question
01-22-2004, 12:54 AM
#1
Guest
Posts: n/a
Valve Seat Question
I'm getting a compressor by this weekend to get these changed. However, a
couple of days ago, when I was trying to change the seals, I noticed the old
ones were riding up on the valve stem. I'm curious what would cause them to
ride up like that. Did they shrink or expand? Is that a common occurrence
and also, I noticed the new ones don't have a means to "hold" or "tie" them
down. What is the theory behind how the valve seals seat themselves
properly and then remain in the proper position thereafter?
Thanks in advance,
Bill
couple of days ago, when I was trying to change the seals, I noticed the old
ones were riding up on the valve stem. I'm curious what would cause them to
ride up like that. Did they shrink or expand? Is that a common occurrence
and also, I noticed the new ones don't have a means to "hold" or "tie" them
down. What is the theory behind how the valve seals seat themselves
properly and then remain in the proper position thereafter?
Thanks in advance,
Bill
01-22-2004, 01:08 AM
#2
Guest
Posts: n/a
Re: Valve Seat Question
Hi Bill,
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
01-22-2004, 01:08 AM
#3
Guest
Posts: n/a
Re: Valve Seat Question
Hi Bill,
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
01-22-2004, 01:08 AM
#4
Guest
Posts: n/a
Re: Valve Seat Question
Hi Bill,
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
That's the way they are supposed to ride, kind of like an umbrella.
The bigger seals, if there is a difference will be the intakes and be
soft enough to suck around the guide when compressed, the exhaust seals
may brown rather than black. Of course, slide them all the way down for
installation.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/
William Oliveri wrote:
>
> I'm getting a compressor by this weekend to get these changed. However, a
> couple of days ago, when I was trying to change the seals, I noticed the old
> ones were riding up on the valve stem. I'm curious what would cause them to
> ride up like that. Did they shrink or expand? Is that a common occurrence
> and also, I noticed the new ones don't have a means to "hold" or "tie" them
> down. What is the theory behind how the valve seals seat themselves
> properly and then remain in the proper position thereafter?
>
> Thanks in advance,
>
> Bill
01-22-2004, 01:22 AM
#5
Guest
Posts: n/a
Re: Valve Seat Question
All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
01-22-2004, 01:22 AM
#6
Guest
Posts: n/a
Re: Valve Seat Question
All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
01-22-2004, 01:22 AM
#7
Guest
Posts: n/a
Re: Valve Seat Question
All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
box says.
So the "umbrella" effect is that at the down position of the valve the seal
rests on the head and at the up position the seal has enough depth or
length to shield oil from getting in. Is that how it works?
When I looked at mine it seemed they were about half way up the stem. When
I checked my plugs it looked like almost every one had a wet look around the
base of the threaded part of the plug. Someone else mentioned that if an
engine overheats it will ruin the valve seals. What happens to them that
makes them not function properly any more? Does the heat cause them to
shrink thus loosing the umbrella effect?
Thanks,
Bill
"L.W. (ßill) ------ III" <----------@***.net> wrote in message
news:400F68D0.B0529614@***.net...
> Hi Bill,
> That's the way they are supposed to ride, kind of like an umbrella.
> The bigger seals, if there is a difference will be the intakes and be
> soft enough to suck around the guide when compressed, the exhaust seals
> may brown rather than black. Of course, slide them all the way down for
> installation.
> God Bless America, ßill O|||||||O
> mailto:-------------------- http://www.----------.com/
>
> William Oliveri wrote:
> >
> > I'm getting a compressor by this weekend to get these changed. However,
a
> > couple of days ago, when I was trying to change the seals, I noticed the
old
> > ones were riding up on the valve stem. I'm curious what would cause
them to
> > ride up like that. Did they shrink or expand? Is that a common
occurrence
> > and also, I noticed the new ones don't have a means to "hold" or "tie"
them
> > down. What is the theory behind how the valve seals seat themselves
> > properly and then remain in the proper position thereafter?
> >
> > Thanks in advance,
> >
> > Bill
01-22-2004, 10:04 AM
#8
Guest
Posts: n/a
Re: Valve Seat Question
All the ones I have seen stayed in place on the head.
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill
01-22-2004, 10:04 AM
#9
Guest
Posts: n/a
Re: Valve Seat Question
All the ones I have seen stayed in place on the head.
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill
01-22-2004, 10:04 AM
#10
Guest
Posts: n/a
Re: Valve Seat Question
All the ones I have seen stayed in place on the head.
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill
They are flexible enough to grab onto the rim at the head and the valve
just slides up and down through them.
Heat causes them to go hard so they don't grab or seal to the valve stem
any more.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's
William Oliveri wrote:
>
> All of mine are the same size. They are Fel-Pro Premium Quality NYLON the
> box says.
>
> So the "umbrella" effect is that at the down position of the valve the seal
> rests on the head and at the up position the seal has enough depth or
> length to shield oil from getting in. Is that how it works?
>
> When I looked at mine it seemed they were about half way up the stem. When
> I checked my plugs it looked like almost every one had a wet look around the
> base of the threaded part of the plug. Someone else mentioned that if an
> engine overheats it will ruin the valve seals. What happens to them that
> makes them not function properly any more? Does the heat cause them to
> shrink thus loosing the umbrella effect?
>
> Thanks,
>
> Bill
>
> "L.W. (ßill) ------ III" <----------@***.net> wrote in message
> news:400F68D0.B0529614@***.net...
> > Hi Bill,
> > That's the way they are supposed to ride, kind of like an umbrella.
> > The bigger seals, if there is a difference will be the intakes and be
> > soft enough to suck around the guide when compressed, the exhaust seals
> > may brown rather than black. Of course, slide them all the way down for
> > installation.
> > God Bless America, ßill O|||||||O
> > mailto:-------------------- http://www.----------.com/
> >
> > William Oliveri wrote:
> > >
> > > I'm getting a compressor by this weekend to get these changed. However,
> a
> > > couple of days ago, when I was trying to change the seals, I noticed the
> old
> > > ones were riding up on the valve stem. I'm curious what would cause
> them to
> > > ride up like that. Did they shrink or expand? Is that a common
> occurrence
> > > and also, I noticed the new ones don't have a means to "hold" or "tie"
> them
> > > down. What is the theory behind how the valve seals seat themselves
> > > properly and then remain in the proper position thereafter?
> > >
> > > Thanks in advance,
> > >
> > > Bill