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Re: [Fot] Oil Blow-by Cause?

To: Robert Lang <robertlangtr6@yahoo.com>
Subject: Re: [Fot] Oil Blow-by Cause?
From: John Styduhar via Fot <fot@autox.team.net>
Date: Wed, 22 May 2019 07:05:33 -0400
Cc: fot <fot@autox.team.net>
Delivered-to: mharc@autox.team.net
Delivered-to: fot@autox.team.net
References: <BA0DE2A9-943F-425E-9A33-65B505252A5C@me.com> <1950843686.21347015.1558512841544.JavaMail.zimbra@telenet.be> <1553035523.3499007.1558522261128@mail.yahoo.com>
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If you have an accusump, check if the valve is operating properly.  Maybe
the valve was closed accidentally during running and the engine oil level
was excessive.

On Wed, May 22, 2019 at 6:54 AM Robert Lang via Fot <fot@autox.team.net>
wrote:

> Hi,
>
> First off - I'd only to the leakdown test with the engine hot. Cold
> numbers don't really count. The numbers that you give look pretty good fr=
om
> a leakdown perspective. As a point of reference, with >10% leakdown into
> the sump in a couple of cylinders, you will see oil drip out of the
> strangest places (like around the nuts holding the valve cover down and t=
he
> filler cap to which you refer.) So, either your gauge is lying or you nee=
d
> to verify your numbers with the engine at operating temps (and see if the
> numbers change). If you have access to another gauge, that might help
> figure out if anything is wrong. Oh, and is there any oil fouling on the
> plugs? Blow by should also introduce some oil into the cylinders when you
> lift off...
>
> I think Marcel's suggestion has merit.
>
> Let us know if you find anything.
>
> Regards,
> Bob Lang
>
> On Wednesday, May 22, 2019, 4:14:19 AM EDT, van.mulders.marcel--- via Fot=
 <
> fot@autox.team.net> wrote:
>
>
> If the catch can has a connection to a (low) spot of the crankcase, lots
> of oil can be pushed into the catch can at the track curves, especially
> when the duct between the crankcase and the can has only a small diameter=
,
> then the oil cannot return to the crankcase. It means there is some blow
> by, but maybe the symptoms are not necessarily bad  news.
> Marcel
>
> ------------------------------
> *Van: *"fot" <fot@autox.team.net>
> *Aan: *"fot" <fot@autox.team.net>
> *Verzonden: *Woensdag 22 mei 2019 04:31:47
> *Onderwerp: *[Fot] Oil Blow-by Cause?
>
> I just had a great weekend at Summit Point, perfect weather, four days an=
d
> lots of track time, some quick laps and good racing.
> After my last session, I noticed some dripping oil as I put the car in th=
e
> trailer.
> Got it home to find a half full catch can (1 pint?), and evidence of oil
> blowing out of the valve cover cap vent hole.
> Tonight I ran a compression test and leakdown test.  Cold engine results:
>
> 1 - 200 and 2%
> 2- 180 and 6%
> 3 - 180 and 9%
> 4 - 195 and 0%
> 5 - 190 and 0%
> 6 - 185 and 0%
>
> Note - I suspect my longacre leakdown gauge may not be reading quite
> right, as when i have the air side set to 100, the leakdown % on the last
> three is slightly below zero.  So, perhaps the leakdown on the first thre=
e
> is higher.
> There was no excess oil until the last session.  Oil pressure is about 50
> hot at idle and 65 - 75 at speed, depending on RPM.
> EGT readings remained in the 1200 - 1250 range across three monitored
> cylinders at top speed
> What do i have - failing rings?
> Any diagnosis or tests you recommend before I start pulling the thing
> apart would be appreciated.
>
> Triumphs racing - I=E2=80=99m sure I=E2=80=99m missing a few but this is =
who I remember.
> TR3 - John Hasty, Henry Frye, John Styduhar
> GT6 - me, Paul King, Jason Sukey, Jay De Pol until his diff case broke
> Spitfire - Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, others
> Tr4 - Mark Wheatley, Allen Goode, I=E2=80=99m missing at least another on=
e
>
> Scott Janzen
>
>
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>
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>
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>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">If =
you have an accusump, check if the valve is operating properly.=C2=A0 Maybe=
 the valve was closed accidentally during running and the engine oil level =
was excessive.=C2=A0=C2=A0</div></div><br><div class=3D"gmail_quote"><div d=
ir=3D"ltr" class=3D"gmail_attr">On Wed, May 22, 2019 at 6:54 AM Robert Lang=
 via Fot &lt;<a href=3D"mailto:fot@autox.team.net";>fot@autox.team.net</a>&g=
t; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0p=
x 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><=
div class=3D"gmail-m_8974874906473699492ydp2edd5880yahoo-style-wrap" style=
=3D"font-family:&quot;Helvetica Neue&quot;,Helvetica,Arial,sans-serif;font-=
size:13px"><div></div>
        <div>Hi,</div><div><br></div><div>First off - I&#39;d only to the l=
eakdown test with the engine hot. Cold numbers don&#39;t really count. The =
numbers that you give look pretty good from a leakdown perspective. As a po=
int of reference, with &gt;10% leakdown into the sump in a couple of cylind=
ers, you will see oil drip out of the strangest places (like around the nut=
s holding the valve cover down and the filler cap to which you refer.) So, =
either your gauge is lying or you need to verify your numbers with the engi=
ne at operating temps (and see if the numbers change). If you have access t=
o another gauge, that might help figure out if anything is wrong. Oh, and i=
s there any oil fouling on the plugs? Blow by should also introduce some oi=
l into the cylinders when you lift off...<br></div><div><br></div><div>I th=
ink Marcel&#39;s suggestion has merit.</div><div><br></div><div>Let us know=
 if you find anything.</div><div><br></div><div>Regards,</div><div>Bob Lang=
<br></div><div><br></div>
       =20
        </div><div id=3D"gmail-m_8974874906473699492yahoo_quoted_8561256062=
" class=3D"gmail-m_8974874906473699492yahoo_quoted">
            <div style=3D"font-family:&quot;Helvetica Neue&quot;,Helvetica,=
Arial,sans-serif;font-size:13px;color:rgb(38,40,42)">
               =20
                <div>
                    On Wednesday, May 22, 2019, 4:14:19 AM EDT, van.mulders=
.marcel--- via Fot &lt;<a href=3D"mailto:fot@autox.team.net"; target=3D"_bla=
nk">fot@autox.team.net</a>&gt; wrote:
                </div>
                <div><br></div>
                <div><br></div>
                <div><div id=3D"gmail-m_8974874906473699492yiv8845066306"><=
div><div style=3D"font-family:Verdana,Arial,Helvetica,sans-serif;font-size:=
10pt;color:rgb(0,0,0)"><div>If the catch can has a connection to a (low) sp=
ot of the crankcase, lots of oil can be pushed into the catch can at the tr=
ack curves, especially when the duct between the crankcase and the can has =
only a small diameter, then the oil cannot return to the crankcase. It mean=
s there is some blow by, but maybe the symptoms are not necessarily bad=C2=
=A0 news.</div><div>Marcel</div><div><br clear=3D"none"></div><hr id=3D"gma=
il-m_8974874906473699492yiv8845066306zwchr"><div class=3D"gmail-m_897487490=
6473699492yiv8845066306yqt7826991802" id=3D"gmail-m_8974874906473699492yiv8=
845066306yqtfd94441"><div><b>Van: </b>&quot;fot&quot; &lt;<a href=3D"mailto=
:fot@autox.team.net" target=3D"_blank">fot@autox.team.net</a>&gt;<br clear=
=3D"none"><b>Aan: </b>&quot;fot&quot; &lt;<a href=3D"mailto:fot@autox.team.=
net" target=3D"_blank">fot@autox.team.net</a>&gt;<br clear=3D"none"><b>Verz=
onden: </b>Woensdag 22 mei 2019 04:31:47<br clear=3D"none"><b>Onderwerp: </=
b>[Fot] Oil Blow-by Cause?<br clear=3D"none"></div><br clear=3D"none"></div=
><div><div class=3D"gmail-m_8974874906473699492yiv8845066306yqt7826991802" =
id=3D"gmail-m_8974874906473699492yiv8845066306yqtfd88235">I just had a grea=
t weekend at Summit Point, perfect weather, four days and lots of track tim=
e, some quick laps and good racing. =C2=A0<div class=3D"gmail-m_89748749064=
73699492yiv8845066306">After my last session, I noticed some dripping oil a=
s I put the car in the trailer.</div><div class=3D"gmail-m_8974874906473699=
492yiv8845066306">Got it home to find a half full catch can (1 pint?), and =
evidence of oil blowing out of the valve cover cap vent hole.</div><div cla=
ss=3D"gmail-m_8974874906473699492yiv8845066306">Tonight I ran a compression=
 test and leakdown test.=C2=A0 Cold engine results:</div><div class=3D"gmai=
l-m_8974874906473699492yiv8845066306"><br class=3D"gmail-m_8974874906473699=
492yiv8845066306" clear=3D"none"></div><div class=3D"gmail-m_89748749064736=
99492yiv8845066306">1 - 200 and 2%</div><div class=3D"gmail-m_8974874906473=
699492yiv8845066306">2- 180 and 6%</div><div class=3D"gmail-m_8974874906473=
699492yiv8845066306">3 - 180 and 9%</div><div class=3D"gmail-m_897487490647=
3699492yiv8845066306">4 - 195 and 0%</div><div class=3D"gmail-m_89748749064=
73699492yiv8845066306">5 - 190 and 0%</div><div class=3D"gmail-m_8974874906=
473699492yiv8845066306">6 - 185 and 0%</div><div class=3D"gmail-m_897487490=
6473699492yiv8845066306"><br class=3D"gmail-m_8974874906473699492yiv8845066=
306" clear=3D"none"></div><div class=3D"gmail-m_8974874906473699492yiv88450=
66306">Note - I suspect my longacre leakdown gauge may not be reading quite=
 right, as when i have the air side set to 100, the leakdown % on the last =
three is slightly below zero.=C2=A0 So, perhaps the leakdown on the first t=
hree is higher.=C2=A0</div><div class=3D"gmail-m_8974874906473699492yiv8845=
066306">There was no excess oil until the last session.=C2=A0 Oil pressure =
is about 50 hot at idle and 65 - 75 at speed, depending on RPM.</div><div c=
lass=3D"gmail-m_8974874906473699492yiv8845066306">EGT readings remained in =
the 1200 - 1250 range across three monitored cylinders at top speed</div><d=
iv class=3D"gmail-m_8974874906473699492yiv8845066306">What do i have - fail=
ing rings? =C2=A0</div><div class=3D"gmail-m_8974874906473699492yiv88450663=
06">Any diagnosis or tests you recommend before I start pulling the thing a=
part would be appreciated.</div><div class=3D"gmail-m_8974874906473699492yi=
v8845066306"><br class=3D"gmail-m_8974874906473699492yiv8845066306" clear=
=3D"none"></div><div class=3D"gmail-m_8974874906473699492yiv8845066306">Tri=
umphs racing - I=E2=80=99m sure I=E2=80=99m missing a few but this is who I=
 remember.</div><div class=3D"gmail-m_8974874906473699492yiv8845066306">TR3=
 - John Hasty, Henry Frye, John Styduhar</div><div class=3D"gmail-m_8974874=
906473699492yiv8845066306">GT6 - me, Paul King, Jason Sukey, Jay De Pol unt=
il his diff case broke</div><div class=3D"gmail-m_8974874906473699492yiv884=
5066306">Spitfire - Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, others=
=C2=A0</div><div class=3D"gmail-m_8974874906473699492yiv8845066306">Tr4 - M=
ark Wheatley, Allen Goode, I=E2=80=99m missing at least another one</div><d=
iv class=3D"gmail-m_8974874906473699492yiv8845066306"><br class=3D"gmail-m_=
8974874906473699492yiv8845066306" clear=3D"none"></div><div class=3D"gmail-=
m_8974874906473699492yiv8845066306">Scott Janzen</div><div class=3D"gmail-m=
_8974874906473699492yiv8845066306"><br class=3D"gmail-m_8974874906473699492=
yiv8845066306" clear=3D"none"></div><br clear=3D"none">____________________=
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</blockquote></div>

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