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--047d7b5d8dab294ac7051268443d
Yes. This is happening. The head material expands less, the guide expand
more, and thus it has to go somewhere. Metals are not that "solid" as they
might look like.
Gergo
2015-03-29 4:09 GMT+02:00 Michael Salter <michaelsalter@gmail.com>:
> So Gergo,
> if I understand you correctly in a situation where the guide was not
> installed in a head and it was then heated the outside diameter and for
> that matter the inside diameter of the guide would increase due to thermal
> expansion....correct?
> However, the difference, when the guide is installed in the head is that
> the head material, i.e. the hole that the guide is installed in, would
> prevent the guide from expanding or, expressed another way, because the
> hole in the head would not increase in diameter as much as the guide would
> increase in diameter the head material would effectively compress the guide
> and prevent it from expanding..... correct?
>
> Michael S
>
> On Sat, Mar 28, 2015 at 4:38 PM, Austin Healey <pajtamuvek@gmail.com>
> wrote:
>
>> 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?
>>>>>>
>>>>>> _______________________________________________
>>>>>> Support Team.Net http://www.team.net/donate.html
>>>>>> Suggested annual donation $12.75
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>>>>>>
>>>>>> Healeys@autox.team.net
>>>>>> http://autox.team.net/mailman/listinfo/healeys
>>>>>>
>>>>>> Unsubscribe/Manage:
>>>>>> http://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> *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
>>>>> Forums: http://www.team.net/forums
>>>>>
>>>>> Healeys@autox.team.net
>>>>> http://autox.team.net/mailman/listinfo/healeys
>>>>>
>>>>> Unsubscribe/Manage:
>>>>> http://autox.team.net/mailman/options/healeys/pajtamuvek@gmail.com
>>>>>
>>>>>
>>>>>
>>>>
>>>
>>>
>>> --
>>> *If you can't fix it with a hammer, you've got an electrical problem.*
>>>
>>>
>>
>
>
> --
> *If you can't fix it with a hammer, you've got an electrical problem.*
>
>
--047d7b5d8dab294ac7051268443d
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">Yes. This is happening. The head material expands less, th=
e guide expand more, and thus it has to go somewhere. Metals are not that &=
quot;solid" as they might look like.<div><br></div><div>Gergo</div></d=
iv><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">2015-03-29 4:0=
9 GMT+02:00 Michael Salter <span dir=3D"ltr"><<a href=3D"mailto:michaels=
alter@gmail.com" target=3D"_blank">michaelsalter@gmail.com</a>></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_defa=
ult" style=3D"font-family:comic sans ms,sans-serif;font-size:small">So Gerg=
o, <br>if I understand you correctly in a situation where the guide was not=
installed in a head and it was then heated the outside diameter and for th=
at matter the inside diameter of the guide would increase due to thermal ex=
pansion....correct?<br></div><div class=3D"gmail_default" style=3D"font-fam=
ily:comic sans ms,sans-serif;font-size:small">However, the difference, when=
the guide is installed in the head is that the head material, i.e. the hol=
e that the guide is installed in, would prevent the guide from expanding or=
, expressed another way, because the hole in the head would not increase in=
diameter as much as the guide would increase in diameter the head material=
would effectively compress the guide and prevent it from expanding..... co=
rrect?<br><br></div><div class=3D"gmail_default" style=3D"font-family:comic=
sans ms,sans-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"gma=
il_quote">On Sat, Mar 28, 2015 at 4:38 PM, Austin Healey <span dir=3D"ltr">=
<<a href=3D"mailto:pajtamuvek@gmail.com"; target=3D"_blank">pajtamuvek@gm=
ail.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"><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><div><div class=3D"=
gmail_extra"><br><div class=3D"gmail_quote">2015-03-28 20:12 GMT+01:00 Mich=
ael Salter <span dir=3D"ltr"><<a href=3D"mailto:michaelsalter@gmail.com"=
target=3D"_blank">michaelsalter@gmail.com</a>></span>:<br><blockquote c=
lass=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"fo=
nt-family:comic sans ms,sans-serif;font-size:small">Hi Gergo, <br>just so I=
'm clear...you are suggesting that the internal diameter of the guide w=
ill 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,sa=
ns-serif;font-size:small">Michael S<br></div></div><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.co=
m" target=3D"_blank">pajtamuvek@gmail.com</a>></span> wrote:<br><blockqu=
ote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc s=
olid;padding-left:1ex"><div dir=3D"ltr">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 effe=
cts: oil consumption, and premature wear on the valves as they dissipate he=
at slower due to rocking on the valve seat. The exhaust guides are more pro=
ne to oil consumption, exhaust guides are more prone to overheating.<div><b=
r></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"><<a href=3D"mailto:michaelsalter@gmail.com"; target=3D"_blank">m=
ichaelsalter@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"><div><div><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>
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<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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<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't =
fix it with a hammer, you'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>
</div></div></blockquote></div><br><br clear=3D"all"><br>-- <br><div><div d=
ir=3D"ltr"><div><div dir=3D"ltr"><i><font><span style=3D"color:black">If yo=
u can't fix it with a hammer, you've got an electrical problem.</sp=
an></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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