This is a multipart message in MIME format.
--===============2781445267853671357==
boundary="----=_NextPart_000_0101_01D09151.EE2BF0E0"
Content-Language: en-us
This is a multipart message in MIME format.
------=_NextPart_000_0101_01D09151.EE2BF0E0
charset="us-ascii"
Content-Transfer-Encoding: 7bit
Regarding Rule of Nine, I understand having 8 all the way up to set 1. But
there is a significant rotation between "real close to the top" in front of,
and after TDC. This can be seen with rotation the engine and seeing very
little to no movement. Also, if I am not mistaken 8 TDC is not perfectly in
line with BDC of 1; there is a bias. This means that when 8 is TDC, 1 is not
absolutely BDC ready for measurement. So the question is, how do you ensure,
with all of that slop, that you truly have BDC?
TIA,
Clayton
From: PaulHunt73 [mailto:paulhunt73@virginmedia.com]
Sent: Monday, May 18, 2015 12:25 AM
To: crk@godblessthe.us; mgacars@yahoogroups.com; mgs@autox.team.net
Subject: Re: [Mgs] tappet question
Depends on the figure you used. Workshop Manual quotes 15 thou, cold. I
don't like hot as the engine is continually cooling while I'm doing it. I
use 14 thou which is loose and 16 thou which is lightly pinched so I can get
a better feel for it as I only check them very rarely. As far as I know it
really only makes a difference if the engine gets so hot that the gaps close
up and you get combustion seepage past not quite closed valves, which burns
them. Any loss of performance is only secondary.
In the early years not only did I find I was adjusting them every year,
sometimes opening them and sometimes closing them, but also getting
repeatable gaps from one turn of the engine to the next was a problem. Then
I discovered that at the strict rule of nine (RON) points, several of the
valves were still changing gap. Some of them had the biggest gap before RON
and some after. Since discovering that perhaps 15 years or go or more I've
never had to alter them until I changed the head gasket last year, so hadn't
been checking tem every year anyway.
PaulH
----- Original Message -----
When I went to reset the tappet clearance, I found the old settings rather
sloppy. I reset them so that the gauge was snug - it slid in but it
definitely tight. Which is correct? I know that it makes a difference on
performance and full combustion. Yes, I did the checking while hot.
------=_NextPart_000_0101_01D09151.EE2BF0E0
charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
<html xmlns:v=3D"urn:schemas-microsoft-com:vml" =
xmlns:o=3D"urn:schemas-microsoft-com:office:office" =
xmlns:w=3D"urn:schemas-microsoft-com:office:word" =
xmlns:m=3D"http://schemas.microsoft.com/office/2004/12/omml"; =
xmlns=3D"http://www.w3.org/TR/REC-html40";><head><meta =
http-equiv=3DContent-Type content=3D"text/html; =
charset=3Dus-ascii"><meta name=3DGenerator content=3D"Microsoft Word 15 =
(filtered medium)"><style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0in;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal;
font-family:"Calibri",sans-serif;
color:windowtext;}
span.EmailStyle18
{mso-style-type:personal-reply;
font-family:"Calibri",sans-serif;
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:8.5in 11.0in;
margin:1.0in 1.0in 1.0in 1.0in;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext=3D"edit" spidmax=3D"1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext=3D"edit">
<o:idmap v:ext=3D"edit" data=3D"1" />
</o:shapelayout></xml><![endif]--></head><body bgcolor=3Dwhite =
lang=3DEN-US link=3D"#0563C1" vlink=3D"#954F72"><div =
class=3DWordSection1><p class=3DMsoNormal><span =
style=3D'color:#1F497D'>Regarding Rule of Nine, I understand having 8 =
all the way up to set 1. But there is a significant rotation between =
“real close to the top” in front of, and after TDC. This can =
be seen with rotation the engine and seeing very little to no movement. =
Also, if I am not mistaken 8 TDC is not perfectly in line with BDC of 1; =
there is a bias. This means that when 8 is TDC, 1 is not absolutely BDC =
ready for measurement. So the question is, how do you ensure, with all =
of that slop, that you truly have BDC?<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'>TIA,<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p> </o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'>Clayton<o:p></o:p></span></p><p =
class=3DMsoNormal><span =
style=3D'color:#1F497D'><o:p> </o:p></span></p><div><div =
style=3D'border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in =
0in 0in'><p class=3DMsoNormal><b>From:</b> PaulHunt73 =
[mailto:paulhunt73@virginmedia.com] <br><b>Sent:</b> Monday, May 18, =
2015 12:25 AM<br><b>To:</b> crk@godblessthe.us; mgacars@yahoogroups.com; =
mgs@autox.team.net<br><b>Subject:</b> Re: [Mgs] tappet =
question<o:p></o:p></p></div></div><p =
class=3DMsoNormal><o:p> </o:p></p><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Times New Roman",serif'>Depends =
on the figure you used. Workshop Manual quotes 15 thou, =
cold. I don't like hot as the engine is continually cooling while =
I'm doing it. I use 14 thou which is loose and 16 thou which =
is lightly pinched so I can get a better feel for it as I only =
check them very rarely. As far as I know it really only makes a =
difference if the engine gets so hot that the gaps close up and you get =
combustion seepage past not quite closed valves, which burns =
them. Any loss of performance is only secondary.</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'> <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif'>In the early years not only did I find I was adjusting =
them every year, sometimes opening them and sometimes closing them, =
but also getting repeatable gaps from one turn of the engine to the next =
was a problem. Then I discovered that at the strict rule of nine =
(RON) points, several of the valves were still changing gap. Some =
of them had the biggest gap before RON and some after. Since =
discovering that perhaps 15 years or go or more I've never had to alter =
them until I changed the head gasket last year, so hadn't been checking =
tem every year anyway.</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'><o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'> <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Times New =
Roman",serif'>PaulH</span><span =
style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'><o:p></o:p></span></p></div><blockquote =
style=3D'border:none;border-left:solid black 1.5pt;padding:0in 0in 0in =
4.0pt;margin-left:3.75pt;margin-top:5.0pt;margin-right:0in;margin-bottom:=
5.0pt'><div><p class=3DMsoNormal><span =
style=3D'font-size:10.0pt;font-family:"Arial",sans-serif'>----- Original =
Message ----- <o:p></o:p></span></p></div><div><p =
class=3DMsoNormal><span style=3D'font-size:12.0pt;font-family:"Times New =
Roman",serif'> <o:p></o:p></span></p></div><p =
class=3DMsoNormal>When I went to reset the tappet clearance, I found the =
old settings rather sloppy. I reset them so that the gauge was snug =
– it slid in but it definitely tight. Which is correct? I know =
that it makes a difference on performance and full combustion. Yes, I =
did the checking while =
hot.<o:p></o:p></p></blockquote></div></body></html>
------=_NextPart_000_0101_01D09151.EE2BF0E0--
--===============2781445267853671357==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
Mgs@autox.team.net
Archive: http://www.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mharc@autox.team.net
--===============2781445267853671357==--
|