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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.*
>>
>>
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>
--
*If you can't fix it with a hammer, you've got an electrical problem.*
--089e0160be64eef43105125e0698
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:comic sa=
ns ms,sans-serif;font-size:small">Hi Gergo, <br>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?<br></div><div clas=
s=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;font-size=
:small">Michael S<br></div></div><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"><<a href=3D"mailto:pajtamuvek@gmail.com"; target=3D"_blank">pajt=
amuvek@gmail.com</a>></span> wrote:<br><blockquote class=3D"gmail_quote"=
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><d=
iv dir=3D"ltr">Bronze guides expand more when they heat up. Thats why You h=
ave 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, ex=
haust guides are more prone to overheating.<div><br></div><div>Gergo</div><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote"><div><div cl=
ass=3D"h5">2015-03-27 20:01 GMT+01:00 Michael Salter <span dir=3D"ltr"><=
<a href=3D"mailto:michaelsalter@gmail.com"; target=3D"_blank">michaelsalter@=
gmail.com</a>></span>:<br></div></div><blockquote class=3D"gmail_quote" =
style=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><di=
v><div class=3D"h5"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"=
font-family:comic sans ms,sans-serif;font-size:small">Hi Raymond, <br></div=
><div class=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif=
;font-size:small">The factory specification calls for 0.0025 to 0.0015 clea=
rance for the inlets and 0.002 to 0.001 clearance for the exhausts if you a=
re using cast iron guides however if you are using bronze THAT WILL NOT WOR=
K!!!<br></div><div class=3D"gmail_default" style=3D"font-family:comic sans =
ms,sans-serif;font-size:small">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.<br></div><div class=3D"gmail_default" style=3D=
"font-family:comic sans ms,sans-serif;font-size:small">I would point you to=
<a href=3D"http://www.netbug.net/blogmichael/?p=3D384"; target=3D"_blank">t=
his article</a> on my blog...been there done that...<br><br></div><div clas=
s=3D"gmail_default" style=3D"font-family:comic sans ms,sans-serif;font-size=
:small">Michael S<br></div><div class=3D"gmail_default" style=3D"font-famil=
y:comic sans ms,sans-serif;font-size:small">BN1 #174<br></div></div><div cl=
ass=3D"gmail_extra"><br><div class=3D"gmail_quote"><span>On Fri, Mar 27, 20=
15 at 2:17 PM, RAYMOND SMITHSON <span dir=3D"ltr"><<a href=3D"mailto:rjs=
mithson@shaw.ca" target=3D"_blank">rjsmithson@shaw.ca</a>></span> wrote:=
<br></span><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;bor=
der-left:1px #ccc solid;padding-left:1ex"><span><div><div style=3D"font-fam=
ily:arial,helvetica,sans-serif;font-size:10pt;color:#000000">I am rebuildin=
g my 3000 cylinder head and have found the inlet valve stems have .008"=
; clearance but the exhaust stems have only .002" clearance. Does anyo=
ne know if this is common?</div></div><br></span>__________________________=
_____________________<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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eam.net</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't fix it with a hammer, you'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>
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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 class=3D"gmail_sig=
nature"><div dir=3D"ltr"><div><div dir=3D"ltr"><i><font><span style=3D"colo=
r:black">If you can't fix it with a hammer, you've got an electrica=
l problem.</span></font></i><br><br><div></div><div></div><div></div></div>=
</div></div></div>
</div>
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