--===============3779946236631699236==
--e89a8f8388f529987d051f501870
I forgot the TR3/4 engine was also used in a few other Triumph models.
Maybe Andy Mace will chime in with his knowledge of the other Triumph
models.
On Tue, Sep 8, 2015 at 10:10 PM, Dave <dave1massey@cs.com> wrote:
> Well, of course the upper part isn't sealed from the lower. The oil
> pumped to the rockers has to drain back down somehow. As was mentioned
> previously, it goes through the push rod tubes.
>
> My guess is that the cover is used in other applications (Vanguard?) and
> whatever it was for was not implemented on the TR. Not enough space under
> the hood.
>
> Dave Massey
>
> -----Original Message-----
> From: Brad Kahler <bkahler1@gmail.com>
> Subject: Re: [TR] TR4 road draft tube plug
>
> Alan,
>
> So much for the official Triumph documentation!
>
> Does anyone know why the real early TR4s (and I think late TR3Bs) had the
> brass plug in the top of the valve cover? I've never seen anything
> relating to that plug written anywhere.
>
> I don't think the bottom end can be completely sealed due to the openings
> for the push rods. When the switch was made to the "sealed" system the
> draft tube went away for good.
>
> Thanks,
>
> Brad
>
>
> On Tue, Sep 8, 2015 at 4:48 PM, Alan Myers <amfoto1@aol.com> wrote:
>
>>
>>
>> ... Then at
>> engine number CT14234E through end of TR4 production the
>> cars had air
>> filters with vent openings coming from a flame trap from the valve
>> cover
>> along with a "sealed" valve cover cap and no road draft tube. TR4As had
>> a
>> gulp valve with a vented (1/8" metered opening in the cap) valve cover
>> cap
>> and no road draft tube. This information was found in Service
>> Bulletin
>>
>>
>>
>> I can tell you for certain that's incorrect. The change from open
>> breathing to flame-trap, etc. came later than that.
>>
>> CT17791E (fitted to CT17602L, built in late October, 1962) originally had
>> the vented cap and the road draft tube.
>>
>> The cap is the push on type, has big vents on the underside and filled
>> with coarse "steel wool" to reduce oil spray, I'm sure.
>>
>> The road draft (or draught, I suppose) tube is large diameter, press fit
>> into the side of the block and locked in place with two screws (maybe 1/4
>> or 5/16").
>>
>> The original valve cover has no vent, but it does have a large brass plug
>> where one could be fitted.
>>
>> Never had a problem with oil out of the push on cap or an unusual amount
>> of leaks.... but the road draft tube kept most of the underside of the car
>> rust free!
>>
>> The car now has an aftermarket cast alu valve cover with a breather pipe
>> and a low profile, twist-in filler cap (with a single, tiny breather hole).
>>
>> I've replaced the road draft tube, but didn't plug it. It now has a
>> nipple for a 1/2" or larger hose fitting. I don't think it's a good idea to
>> completely seal up the bottom end of the engine. It needs to be able to
>> breathe, same as the top end.
>>
>> Car is not yet back on the road, but when it is the plan is to have a
>> catch tank or can fitted with a breather cap, with hoses running from both
>> the valve cover and the fitting at the draft tube.
>>
>> I intend to use a catch can similar to this:
>> http://www.summitracing.com/parts/jrc-555-6402
>>
>> Alan Myers
>> San Jose Calif.
>> '62 TR4 CT17602L
>> amfoto1@aol.com
>> http://www.triumphowners.com/to-car/tr4-14/
>>
>>
>>
> <http://autox.team.net/mailman/options/triumphs/dave1massey@cs.com>
>
>
--e89a8f8388f529987d051f501870
Content-Transfer-Encoding: quoted-printable
<div dir=3D"ltr">I forgot the TR3/4 engine was also used in a few other Tri=
umph models.=C2=A0 Maybe Andy Mace will chime in with his knowledge of the =
other Triumph models.<div><br></div><div><br><div class=3D"gmail_extra"><br=
><div class=3D"gmail_quote">On Tue, Sep 8, 2015 at 10:10 PM, Dave <span dir=
=3D"ltr"><<a href=3D"mailto:dave1massey@cs.com"; target=3D"_blank">dave1m=
assey@cs.com</a>></span> wrote:<br><blockquote class=3D"gmail_quote" sty=
le=3D"margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><font =
color=3D"black" size=3D"4" face=3D"Arial, Helvetica, sans-serif"><font size=
=3D"4">Well, of course the upper part isn't sealed from the lower.=C2=
=A0 The oil pumped to the rockers has to drain back down somehow.=C2=A0 As =
was mentioned previously, it goes through the push rod tubes.<br>
<br>
My guess is that the cover is used in other applications (Vanguard?) and wh=
atever it was for was not implemented on the TR.=C2=A0 Not enough space und=
er the hood.<br>
</font>
<div> <br>
</div>
<div style=3D"clear:both"><font size=3D"4">Dave Massey</font><br>
<br>
</div>
<div style=3D"font-family:arial,helvetica;font-size:10pt;color:black">-----=
Original Message-----<br>
From: Brad Kahler <<a href=3D"mailto:bkahler1@gmail.com"; target=3D"_blan=
k">bkahler1@gmail.com</a>><br>
Subject: Re: [TR] TR4 road draft tube plug<br>
<br>
<div>
<div>
=20
<div dir=3D"ltr">
Alan,=C2=A0
=20
<div>
<br>
</div>
=20
<div>
So much for the official Triumph documentation! =C2=A0
</div>
=20
<div>
<br>
</div>
=20
<div>
Does anyone know why the real early TR4s (and I think late TR3Bs) had the b=
rass plug in the top of the valve cover?=C2=A0 I've never seen anything=
relating to that plug written anywhere.
</div>
=20
<div>
<br>
</div>
=20
<div>
I don't think the bottom end can be completely sealed due to the openin=
gs for the push rods.=C2=A0 When the switch was made to the "sealed&qu=
ot; system the draft tube went away for good.
</div>
=20
<div>
<br>
</div>
=20
<div>
Thanks,
</div>
=20
<div>
<br>
</div>
=20
<div>
Brad
</div>
=20
<div>
<br>
=20
<div class=3D"gmail_extra">
<br>
=20
<div class=3D"gmail_quote">
On Tue, Sep 8, 2015 at 4:48 PM, Alan Myers=20
<span dir=3D"ltr"><<a href=3D"mailto:amfoto1@aol.com"; target=3D"_bl=
ank">amfoto1@aol.com</a>></span> wrote:
<br>
<blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-le=
ft:1px #ccc solid;padding-left:1ex">
<font face=3D"Arial, Helvetica, sans-serif" color=3D"black" size=3D"2=
">=20
=20
<div>
=C2=A0
</div>
=20
=20
<div style=3D"color:black;font-family:arial,helvetica;font-size:10pt">
<blockquote style=3D"padding-left:3px;border-left-color:blue;border=
-left-width:2px;border-left-style:solid">
<pre><tt>... Then at
engine number CT14234E through end of TR4 production the
cars had air
filters with vent openings coming from a flame trap from the valve
cover
along with a "sealed" valve cover cap and no road draft tube. TR=
4As had
a
gulp valve with a vented (1/8" metered opening in the cap) valve cover
cap
and no road draft tube. This information was found in Service
Bulletin</tt></pre>
</blockquote>
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
=C2=A0=20
=20
<div>
I can tell you for certain that's incorrect. The change from open breat=
hing to flame-trap, etc. came later than that.
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
CT17791E (fitted to=C2=A0CT17602L, built in late October, 1962) originally =
had the vented cap and the road draft tube.=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
The cap is the push on type, has big vents on the underside and filled with=
coarse =C2=A0"steel wool" to reduce oil spray, I'm sure.=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
The road draft (or draught, I suppose) tube is large diameter, press fit in=
to the side of the block and locked in place with two screws (maybe 1/4 or =
5/16").=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
The original valve cover has no vent, but it does have a large brass plug w=
here one could be fitted.=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
Never had a problem with oil out of the push on cap or an unusual amount of=
leaks.... but the road draft tube kept most of the underside of the car ru=
st free!=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
The car now has an aftermarket cast alu valve cover with a breather pipe an=
d a low profile, twist-in filler cap (with a single, tiny breather hole).=
=20
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
I've replaced the road draft tube, but didn't plug it. It now has a=
nipple for a 1/2" or larger=C2=A0hose fitting. I don't think it&#=
39;s a good idea to completely=C2=A0seal up=C2=A0the bottom end of the engi=
ne. It needs to be able to breathe, same as the top end.=20
<br>
=20
<br>
Car is not yet back on the road, but when it is=C2=A0the plan is=C2=A0 to=
=C2=A0have a catch tank or can=C2=A0fitted with a breather cap, with hoses =
running from both the valve cover and the fitting at the draft tube.
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
I intend to use a catch can similar to this:=20
<a href=3D"http://www.summitracing.com/parts/jrc-555-6402"; target=
=3D"_blank">http://www.summitracing.com/parts/jrc-555-6402</a>
</div>
<span><font color=3D"#888888">=20
=20
<div>
=C2=A0
</div>
</font></span>
</div>
<span><font color=3D"#888888">=20
=20
<div style=3D"clear:both">=20
=20
<div>
<font size=3D"3">Alan Myers</font>=20
</div>
=20
=20
<div>
San Jose Calif.=20
</div>
=20
=20
<div>
'62 TR4 CT17602L
</div>
=20
=20
<div>
<a href=3D"mailto:amfoto1@aol.com"; target=3D"_blank">amfoto1@aol=
.com</a>
</div>
=20
=20
<div>
<a href=3D"http://www.triumphowners.com/to-car/tr4-14/"; target=
=3D"_blank">http://www.triumphowners.com/to-car/tr4-14/</a>
</div>
=20
=20
<div>
=C2=A0
</div>
=20
=20
<div>
=C2=A0
</div>
</div>
</font></span></font>
</blockquote>
</div>
</div>
</div>
</div>
=20
</div>
</div>
<div style=3D"margin:0px;font-family:Tahoma,Verdana,Arial,Sans-Serif;font-s=
ize:12px;color:#000;background-color:#fff">
<pre style=3D"font-size:9pt"><tt>
<a href=3D"http://autox.team.net/mailman/options/triumphs/dave1massey@cs.co=
m" target=3D"_blank"></a>
</tt></pre>
</div>
=20
</div>
</font></blockquote></div><br></div></div></div>
--e89a8f8388f529987d051f501870--
--===============3779946236631699236==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
** triumphs@autox.team.net **
Archive: http://www.team.net/archive
--===============3779946236631699236==--
|