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Re: [TR] TR4 road draft tube plug

To: "'Triumphs'" <Triumphs@autox.team.net>
Subject: Re: [TR] TR4 road draft tube plug
From: "John & Pat Donnelly" <pdonnel1@san.rr.com>
Date: Mon, 7 Sep 2015 13:52:48 -0700
Delivered-to: mharc@autox.team.net
Delivered-to: triumphs@autox.team.net
References: <CADm3DLESv8F08Xm_4qZg3z0Uo4z=GG8YgM+9HajfmGhBFPxMvA@mail.gmail.com> <CANzE1bE5343vOuzMLVusH6Dvh7nzVtGRyFJ37ymLpNON7XJh4A@mail.gmail.com> <CADm3DLFu6-D8HDT7Z6vf-GnTaAeJq=E7zgHTEbLQw0Dd7z+GSw@mail.gmail.com> <CANzE1bFHe4P0XBC_PN_E9ZgQ52b5YtySzCXwRnLAGeOQttzRZw@mail.gmail.com> <CADm3DLG=bukk69n6S+0uuJriT9akxZB4Ujaj448wxVE--3kUnw@mail.gmail.com> <002101d0e975$38573870$a905a950$@rr.com> <CADm3DLH8Hk61W5EF9ggu0WtbfbVw8GpSr4B7Hiq5YMAjsjd7Vg@mail.gmail.com> <CANzE1bHiv0XYxxHK6koz6X-Rhu7W9pV9zqoMR30b5B31ik8+qQ@mail.gmail.com>
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Well, I bought the vented cap when I bought the valve cover from TSI. It ha=
s a hole on the top, but who knows how much it's really venting.  I have ro=
ller rockers installed so I need the extra room.

 

No, the draft hole is still plugged.

 

A mechanic once told me that is you take the valve cover cap off when runni=
ng, then put a shop rag over it you should only see a little deflection. Wh=
en I did it to my car it went up 3-4 inches. That was my big clue that I ne=
eded more venting.

 

All PVC valves are different and each handles different volumes. Some have =
springs that only actuate with a pressure differential. I don=E2=80=99t kno=
w about the GP PVC valve but you might look around for another. They're che=
ap.

 

 

From: Triumphs [mailto:triumphs-bounces@autox.team.net] On Behalf Of Geo Ha=
hn
Sent: Monday, September 07, 2015 11:53 AM
To: Brad Kahler
Cc: Triumphs
Subject: Re: [TR] TR4 road draft tube plug

 

On Mon, Sep 7, 2015 at 10:08 AM, Brad Kahler <bkahler1@gmail.com> wrote:

 

=2E..Also, is your valve cover cap vented (i.e. TR4A style) or non-vented?

 

 

Those terms (or something) confuse me.

 

My late TR4 does not have a vented cap - it seals tight.  I presume that TR=
4As are similar.  Early TR4s and all TR3s had a cap that vents to the atmos=
phere.

 

If you are fighting blow-by (and I think you are) it would seem that a vent=
ed cap might help -- and since your engine apparently has a road draft tube=
 fitted as original then I believe a vented cap would have also been on it.=


 

Geo



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nk=3Dpurple><div class=3DWordSection1><p class=3DMsoNormal><span style=3D'f=
ont-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>Well, I bou=
ght the vented cap when I bought the valve cover from TSI. It has a hole on=
 the top, but who knows how much it's really venting.=C2=A0 I have roller r=
ockers installed so I need the extra room.<o:p></o:p></span></p><p class=3D=
MsoNormal><span style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";=
color:#1F497D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=
=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>No, th=
e draft hole is still plugged.<o:p></o:p></span></p><p class=3DMsoNormal><s=
pan style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-siz=
e:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'>A mechanic once to=
ld me that is you take the valve cover cap off when running, then put a sho=
p rag over it you should only see a little deflection. When I did it to my =
car it went up 3-4 inches. That was my big clue that I needed more venting.=
<o:p></o:p></span></p><p class=3DMsoNormal><span style=3D'font-size:10.0pt;=
font-family:"Arial","sans-serif";color:#1F497D'><o:p>&nbsp;</o:p></span></p=
><p class=3DMsoNormal><span style=3D'font-size:10.0pt;font-family:"Arial","=
sans-serif";color:#1F497D'>All PVC valves are different and each handles di=
fferent volumes. Some have springs that only actuate with a pressure differ=
ential. I don=E2=80=99t know about the GP PVC valve but you might look arou=
nd for another. They're cheap.<o:p></o:p></span></p><p class=3DMsoNormal><s=
pan style=3D'font-size:10.0pt;font-family:"Arial","sans-serif";color:#1F497=
D'><o:p>&nbsp;</o:p></span></p><p class=3DMsoNormal><span style=3D'font-siz=
e:10.0pt;font-family:"Arial","sans-serif";color:#1F497D'><o:p>&nbsp;</o:p><=
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n 0in 0in 4.0pt'><div><div style=3D'border:none;border-top:solid #B5C4DF 1.=
0pt;padding:3.0pt 0in 0in 0in'><p class=3DMsoNormal><b><span style=3D'font-=
size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style=
=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Triumphs [mailto:t=
riumphs-bounces@autox.team.net] <b>On Behalf Of </b>Geo Hahn<br><b>Sent:</b=
> Monday, September 07, 2015 11:53 AM<br><b>To:</b> Brad Kahler<br><b>Cc:</=
b> Triumphs<br><b>Subject:</b> Re: [TR] TR4 road draft tube plug<o:p></o:p>=
</span></p></div></div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p><div><div>=
<div><p class=3DMsoNormal>On Mon, Sep 7, 2015 at 10:08 AM, Brad Kahler &lt;=
<a href=3D"mailto:bkahler1@gmail.com"; target=3D"_blank">bkahler1@gmail.com<=
/a>&gt; wrote:<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o=
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pt;padding:0in 0in 0in 6.0pt;margin-left:4.8pt;margin-right:0in'><div><div>=
<p class=3DMsoNormal>...Also, is your valve cover cap vented (i.e. TR4A sty=
le) or non-vented?<o:p></o:p></p></div></div></blockquote><div><p class=3DM=
soNormal>&nbsp;<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</=
o:p></p></div><div><p class=3DMsoNormal>Those terms (or something) confuse =
me.<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></di=
v><div><p class=3DMsoNormal>My&nbsp;late TR4&nbsp;does not have a vented ca=
p - it seals tight.&nbsp; I presume that TR4As are similar.&nbsp; Early TR4=
s and all TR3s&nbsp;had a cap that vents to the atmosphere.<o:p></o:p></p><=
/div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></p></div><div><p class=3DM=
soNormal>If you are fighting blow-by (and I think you are) it would seem th=
at a vented cap might help -- and since your engine apparently has a road d=
raft tube fitted as original then I believe a vented cap would have also be=
en on it.<o:p></o:p></p></div><div><p class=3DMsoNormal><o:p>&nbsp;</o:p></=
p></div><div><p class=3DMsoNormal>Geo<o:p></o:p></p></div></div></div></div=
></div>
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