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Re: [Healeys] valve guides

To: Michael Salter <michaelsalter@gmail.com>
Subject: Re: [Healeys] valve guides
From: Austin Healey <pajtamuvek@gmail.com>
Date: Sat, 28 Mar 2015 21:38:08 +0100
Cc: "healeys@autox.team.net" <healeys@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
References: <11845844.18350440.1427480243323.JavaMail.root@shaw.ca> <CAB3i7LKpx2C-QkV6Nedp2QdPLjJn7fBEG+k6LJDiZVKGnuiVmw@mail.gmail.com> <CA+QDXmAcZJJ+oWZREp6wTF8eR0pd51bfsDKmJEacs5vFUz2taw@mail.gmail.com> <CAB3i7LKC+dUV3n7YfMLSEuX1_NAp5Y6e3qy6BXawkGVGJDkQwg@mail.gmail.com>
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Yes it does. The material has to expand somewhere. It cant go in the
oposite direction.

g

2015-03-28 20:12 GMT+01:00 Michael Salter <michaelsalter@gmail.com>:

> Hi Gergo,
> just so I'm clear...you are suggesting that the internal diameter of the
> guide will get smaller as it heats up therefore that extra clearance is
> required?
> Michael S
>
> On Sat, Mar 28, 2015 at 3:08 AM, Austin Healey <pajtamuvek@gmail.com>
> wrote:
>
>> Bronze guides expand more when they heat up. Thats why You have to use
>> greater clearance. But when they work, the clearance will be the same. Worn
>> out guides have two negative side effects: oil consumption, and premature
>> wear on the valves as they dissipate heat slower due to rocking on the
>> valve seat. The exhaust guides are more prone to oil consumption, exhaust
>> guides are more prone to overheating.
>>
>> Gergo
>>
>> 2015-03-27 20:01 GMT+01:00 Michael Salter <michaelsalter@gmail.com>:
>>
>>> Hi Raymond,
>>> The factory specification calls for 0.0025 to 0.0015 clearance for the
>>> inlets and 0.002 to 0.001 clearance for the exhausts if you are using cast
>>> iron guides however if you are using bronze THAT WILL NOT WORK!!!
>>> To be safe with bronze guides you will have to hog them out to about
>>> 0.006" clearance..which means there is really no point in replacing them.
>>> I would point you to this article
>>> <http://www.netbug.net/blogmichael/?p=384> on my blog...been there done
>>> that...
>>>
>>> Michael S
>>> BN1 #174
>>>
>>> On Fri, Mar 27, 2015 at 2:17 PM, RAYMOND SMITHSON <rjsmithson@shaw.ca>
>>> wrote:
>>>
>>>> I am rebuilding my 3000 cylinder head and have found the inlet valve
>>>> stems have .008" clearance but the exhaust stems have only .002" clearance.
>>>> Does anyone know if this is common?
>>>>
>>>> _______________________________________________
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>>>>
>>>>
>>>>
>>>
>>>
>>> --
>>> *If you can't fix it with a hammer, you've got an electrical problem.*
>>>
>>>
>>> _______________________________________________
>>> Support Team.Net http://www.team.net/donate.html
>>> Suggested annual donation  $12.75
>>> Archive: http://www.team.net/archive
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>>> Unsubscribe/Manage:
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>>>
>>>
>>>
>>
>
>
> --
> *If you can't fix it with a hammer, you've got an electrical problem.*
>
>

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Yes it does. The material has to expand somewhere. It cant=
 go in the oposite direction.<div><br></div><div>g</div></div><div class=3D=
"gmail_extra"><br><div class=3D"gmail_quote">2015-03-28 20:12 GMT+01:00 Mic=
hael Salter <span dir=3D"ltr">&lt;<a href=3D"mailto:michaelsalter@gmail.com=
" target=3D"_blank">michaelsalter@gmail.com</a>&gt;</span>:<br><blockquote =
class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid=
;padding-left:1ex"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"f=
ont-family:comic sans ms,sans-serif;font-size:small">Hi Gergo, <br>just so =
I&#39;m clear...you are suggesting that the internal diameter of the guide =
will get smaller as it heats up therefore that extra clearance is required?=
<br></div><div class=3D"gmail_default" style=3D"font-family:comic sans ms,s=
ans-serif;font-size:small">Michael S<br></div></div><div class=3D"HOEnZb"><=
div class=3D"h5"><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">=
On Sat, Mar 28, 2015 at 3:08 AM, Austin Healey <span dir=3D"ltr">&lt;<a hre=
f=3D"mailto:pajtamuvek@gmail.com"; target=3D"_blank">pajtamuvek@gmail.com</a=
>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin:0 =
0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir=3D"ltr">Bron=
ze guides expand more when they heat up. Thats why You have to use greater =
clearance. But when they work, the clearance will be the same. Worn out gui=
des have two negative side effects: oil consumption, and premature wear on =
the valves as they dissipate heat slower due to rocking on the valve seat. =
The exhaust guides are more prone to oil consumption, exhaust guides are mo=
re prone to overheating.<div><br></div><div>Gergo</div></div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote"><div><div>2015-03-27 20:01 GMT+=
01:00 Michael Salter <span dir=3D"ltr">&lt;<a href=3D"mailto:michaelsalter@=
gmail.com" target=3D"_blank">michaelsalter@gmail.com</a>&gt;</span>:<br></d=
iv></div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;borde=
r-left:1px #ccc solid;padding-left:1ex"><div><div><div dir=3D"ltr"><div cla=
ss=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;font-siz=
e:small">Hi Raymond, <br></div><div class=3D"gmail_default" style=3D"font-f=
amily:comic sans ms,sans-serif;font-size:small">The factory specification c=
alls for 0.0025 to 0.0015 clearance for the inlets and 0.002 to 0.001 clear=
ance for the exhausts if you are using cast iron guides however if you are =
using bronze THAT WILL NOT WORK!!!<br></div><div class=3D"gmail_default" st=
yle=3D"font-family:comic sans ms,sans-serif;font-size:small">To be safe wit=
h bronze guides you will have to hog them out to about 0.006&quot; clearanc=
e..which means there is really no point in replacing them.<br></div><div cl=
ass=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;font-si=
ze:small">I would point you to <a href=3D"http://www.netbug.net/blogmichael=
/?p=3D384" target=3D"_blank">this article</a> on my blog...been there done =
that...<br><br></div><div class=3D"gmail_default" style=3D"font-family:comi=
c sans ms,sans-serif;font-size:small">Michael S<br></div><div class=3D"gmai=
l_default" style=3D"font-family:comic sans ms,sans-serif;font-size:small">B=
N1 #174<br></div></div><div class=3D"gmail_extra"><br><div class=3D"gmail_q=
uote"><span>On Fri, Mar 27, 2015 at 2:17 PM, RAYMOND SMITHSON <span dir=3D"=
ltr">&lt;<a href=3D"mailto:rjsmithson@shaw.ca"; target=3D"_blank">rjsmithson=
@shaw.ca</a>&gt;</span> wrote:<br></span><blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><sp=
an><div><div style=3D"font-family:arial,helvetica,sans-serif;font-size:10pt=
;color:#000000">I am rebuilding my 3000 cylinder head and have found the in=
let valve stems have .008&quot; clearance but the exhaust stems have only .=
002&quot; clearance. Does anyone know if this is common?</div></div><br></s=
pan>_______________________________________________<br>
nk">http://www.team.net/donate.html</a><br>
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.team.net/forums</a><br>
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<br>
<br></blockquote></div><span><font color=3D"#888888"><br><br clear=3D"all">=
<br>-- <br><div><div dir=3D"ltr"><div><div dir=3D"ltr"><i><font><span style=
=3D"color:black">If you can&#39;t fix it with a hammer, you&#39;ve got an e=
lectrical problem.</span></font></i><br><br><div></div><div></div><div></di=
v></div></div></div></div>
</font></span></div>
<br>_______________________________________________<br>
nk">http://www.team.net/donate.html</a><br>
Archive: <a href=3D"http://www.team.net/archive"; target=3D"_blank">http://w=
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.team.net/forums</a><br>
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ions/healeys/pajtamuvek@gmail.com</a><br>
<br>
<br></blockquote></div><br></div>
</blockquote></div><br><br clear=3D"all"><br>-- <br><div><div dir=3D"ltr"><=
div><div dir=3D"ltr"><i><font><span style=3D"color:black">If you can&#39;t =
fix it with a hammer, you&#39;ve got an electrical problem.</span></font></=
i><br><br><div></div><div></div><div></div></div></div></div></div>
</div>
</div></div></blockquote></div><br></div>

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