I was talking to a mechanic today who told me that all modern engines (post
lead in gas) have the valve guides knurled to allow lubrication to the valve
stem. He's saying all new cars are this way.

Does this make any sense? Didn't sound right to me. I was told that
knurling is a practice that is less desirable than replacing the guide.

 

Hi Bill,
I really doubt they knurl new engine valve guides, it removes a lot
of meat. And it wasn't something we did in the old hot rod days for
better lubrication, but just to save an expensive guide insert sleeve. I
don't know when my Bronco with three hundred thousand will wear enough
to justify rebuilding it, so I haven't seen a post unleaded engine apart
yet.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> I was talking to a mechanic today who told me that all modern engines (post
> lead in gas) have the valve guides knurled to allow lubrication to the valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.

 

Hi Bill,
I really doubt they knurl new engine valve guides, it removes a lot
of meat. And it wasn't something we did in the old hot rod days for
better lubrication, but just to save an expensive guide insert sleeve. I
don't know when my Bronco with three hundred thousand will wear enough
to justify rebuilding it, so I haven't seen a post unleaded engine apart
yet.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> I was talking to a mechanic today who told me that all modern engines (post
> lead in gas) have the valve guides knurled to allow lubrication to the valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.

 

Hi Bill,
I really doubt they knurl new engine valve guides, it removes a lot
of meat. And it wasn't something we did in the old hot rod days for
better lubrication, but just to save an expensive guide insert sleeve. I
don't know when my Bronco with three hundred thousand will wear enough
to justify rebuilding it, so I haven't seen a post unleaded engine apart
yet.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

William Oliveri wrote:
>
> I was talking to a mechanic today who told me that all modern engines (post
> lead in gas) have the valve guides knurled to allow lubrication to the valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.

 

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> I was talking to a mechanic today who told me that all modern engines
(post
> lead in gas) have the valve guides knurled to allow lubrication to the
valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.
>


Bill,

I do quite a few valve jobs on newer engines, and I have yet to see a head
that had knurled guides from the factory. Knurling is an undesirable process
for the auto makers because it is slow (read costly). Also, the knurled
guides do not last as long as a smooth bore guide. If you are going to have
your head rebuilt, and plan on keeping the Jeep for a long time, have bronze
guides put in if they need replacing. The bronze wears better than new steel
or cast guides, and will outlast a knurled guide by a longshot. They are a
bit more costly than the steel guides, but not that much, and are well worth
a few more bucks.

Chris

 

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> I was talking to a mechanic today who told me that all modern engines
(post
> lead in gas) have the valve guides knurled to allow lubrication to the
valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.
>


Bill,

I do quite a few valve jobs on newer engines, and I have yet to see a head
that had knurled guides from the factory. Knurling is an undesirable process
for the auto makers because it is slow (read costly). Also, the knurled
guides do not last as long as a smooth bore guide. If you are going to have
your head rebuilt, and plan on keeping the Jeep for a long time, have bronze
guides put in if they need replacing. The bronze wears better than new steel
or cast guides, and will outlast a knurled guide by a longshot. They are a
bit more costly than the steel guides, but not that much, and are well worth
a few more bucks.

Chris

 

"William Oliveri" <wuji@bigvalley.net> wrote in message
news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> I was talking to a mechanic today who told me that all modern engines
(post
> lead in gas) have the valve guides knurled to allow lubrication to the
valve
> stem. He's saying all new cars are this way.
>
> Does this make any sense? Didn't sound right to me. I was told that
> knurling is a practice that is less desirable than replacing the guide.
>


Bill,

I do quite a few valve jobs on newer engines, and I have yet to see a head
that had knurled guides from the factory. Knurling is an undesirable process
for the auto makers because it is slow (read costly). Also, the knurled
guides do not last as long as a smooth bore guide. If you are going to have
your head rebuilt, and plan on keeping the Jeep for a long time, have bronze
guides put in if they need replacing. The bronze wears better than new steel
or cast guides, and will outlast a knurled guide by a longshot. They are a
bit more costly than the steel guides, but not that much, and are well worth
a few more bucks.

Chris

 

Thanks Chris,
I knew what I have learned here and other places falls right in line with
what you are saying. Just wanted to confirm it. This guy was obviously
giving me a line or didn't know what he was talking about or both.

Bill



"c" <c@me.org> wrote in message
news:LpYVb.32817$2h.8090@twister.rdc-kc.rr.com...
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> > I was talking to a mechanic today who told me that all modern engines
> (post
> > lead in gas) have the valve guides knurled to allow lubrication to the
> valve
> > stem. He's saying all new cars are this way.
> >
> > Does this make any sense? Didn't sound right to me. I was told that
> > knurling is a practice that is less desirable than replacing the guide.
> >
>
>
> Bill,
>
> I do quite a few valve jobs on newer engines, and I have yet to see a head
> that had knurled guides from the factory. Knurling is an undesirable
process
> for the auto makers because it is slow (read costly). Also, the knurled
> guides do not last as long as a smooth bore guide. If you are going to
have
> your head rebuilt, and plan on keeping the Jeep for a long time, have
bronze
> guides put in if they need replacing. The bronze wears better than new
steel
> or cast guides, and will outlast a knurled guide by a longshot. They are a
> bit more costly than the steel guides, but not that much, and are well
worth
> a few more bucks.
>
> Chris
>
>

 

Thanks Chris,
I knew what I have learned here and other places falls right in line with
what you are saying. Just wanted to confirm it. This guy was obviously
giving me a line or didn't know what he was talking about or both.

Bill



"c" <c@me.org> wrote in message
news:LpYVb.32817$2h.8090@twister.rdc-kc.rr.com...
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> > I was talking to a mechanic today who told me that all modern engines
> (post
> > lead in gas) have the valve guides knurled to allow lubrication to the
> valve
> > stem. He's saying all new cars are this way.
> >
> > Does this make any sense? Didn't sound right to me. I was told that
> > knurling is a practice that is less desirable than replacing the guide.
> >
>
>
> Bill,
>
> I do quite a few valve jobs on newer engines, and I have yet to see a head
> that had knurled guides from the factory. Knurling is an undesirable
process
> for the auto makers because it is slow (read costly). Also, the knurled
> guides do not last as long as a smooth bore guide. If you are going to
have
> your head rebuilt, and plan on keeping the Jeep for a long time, have
bronze
> guides put in if they need replacing. The bronze wears better than new
steel
> or cast guides, and will outlast a knurled guide by a longshot. They are a
> bit more costly than the steel guides, but not that much, and are well
worth
> a few more bucks.
>
> Chris
>
>

 

Thanks Chris,
I knew what I have learned here and other places falls right in line with
what you are saying. Just wanted to confirm it. This guy was obviously
giving me a line or didn't know what he was talking about or both.

Bill



"c" <c@me.org> wrote in message
news:LpYVb.32817$2h.8090@twister.rdc-kc.rr.com...
>
> "William Oliveri" <wuji@bigvalley.net> wrote in message
> news:c09e42$14lu8s$1@ID-193866.news.uni-berlin.de...
> > I was talking to a mechanic today who told me that all modern engines
> (post
> > lead in gas) have the valve guides knurled to allow lubrication to the
> valve
> > stem. He's saying all new cars are this way.
> >
> > Does this make any sense? Didn't sound right to me. I was told that
> > knurling is a practice that is less desirable than replacing the guide.
> >
>
>
> Bill,
>
> I do quite a few valve jobs on newer engines, and I have yet to see a head
> that had knurled guides from the factory. Knurling is an undesirable
process
> for the auto makers because it is slow (read costly). Also, the knurled
> guides do not last as long as a smooth bore guide. If you are going to
have
> your head rebuilt, and plan on keeping the Jeep for a long time, have
bronze
> guides put in if they need replacing. The bronze wears better than new
steel
> or cast guides, and will outlast a knurled guide by a longshot. They are a
> bit more costly than the steel guides, but not that much, and are well
worth
> a few more bucks.
>
> Chris
>
>