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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 from a leak=
down 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 place=
s (like around the nuts 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 engine at operating temps (and see if the numbers change)=
. If you have access to another gauge, that might help figure out if anythi=
ng 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 F=
ot <fot@autox.team.net> wrote: =20
=20
If the catch can has a connection to a (low) spot of the crankcase, lots o=
f 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, bu=
t maybe the symptoms are not necessarily bad=C2=A0 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 and =
lots of track time, some quick laps and good racing. =C2=A0After my last se=
ssion, I noticed some dripping oil as I put the car in the trailer.Got it h=
ome to find a half full catch can (1 pint?), and evidence of oil blowing ou=
t of the valve cover cap vent hole.Tonight I ran a compression test and lea=
kdown test. =C2=A0Cold engine results:
1 - 200 and 2%2- 180 and 6%3 - 180 and 9%4 - 195 and 0%5 - 190 and 0%6 - 18=
5 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 i=
s slightly below zero. =C2=A0So, perhaps the leakdown on the first three is=
higher.=C2=A0There was no excess oil until the last session. =C2=A0Oil pre=
ssure is about 50 hot at idle and 65 - 75 at speed, depending on RPM.EGT re=
adings remained in the 1200 - 1250 range across three monitored cylinders a=
t top speedWhat do i have - failing rings? =C2=A0Any 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 wh=
o I remember.TR3 - John Hasty, Henry Frye, John StyduharGT6 - me, Paul King=
, Jason Sukey, Jay De Pol until his diff case brokeSpitfire - Russ Moore, M=
arty Sukey, Jeff Govert, Kent Bain, others=C2=A0Tr4 - Mark Wheatley, Allen =
Goode, I=E2=80=99m missing at least another one
Scott Janzen
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
arcel@telenet.be
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
@yahoo.com
=20
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<html><head></head><body><div class=3D"ydp2edd5880yahoo-style-wrap" style=
=3D"font-family:Helvetica Neue, Helvetica, Arial, sans-serif;font-size:13px=
;"><div></div>
<div>Hi,</div><div><br></div><div>First off - I'd only to the leakd=
own test with the engine hot. Cold numbers don't really count. The numbers =
that you give look pretty good from a leakdown perspective. As a point of r=
eference, 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 holdin=
g the valve cover down and the filler cap to which you refer.) So, either y=
our gauge is lying or you need to verify your numbers with the engine at op=
erating temps (and see if the numbers change). If you have access to anothe=
r 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 t=
he cylinders when you lift off...<br></div><div><br></div><div>I think Marc=
el'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><d=
iv><br></div>
=20
</div><div id=3D"yahoo_quoted_8561256062" class=3D"yahoo_quoted">
<div style=3D"font-family:'Helvetica Neue', Helvetica, Arial, s=
ans-serif;font-size:13px;color:#26282a;">
=20
<div>
On Wednesday, May 22, 2019, 4:14:19 AM EDT, van.mulders=
.marcel--- via Fot <fot@autox.team.net> wrote:
</div>
<div><br></div>
<div><br></div>
<div><div id=3D"yiv8845066306"><div><div style=3D"font-fami=
ly:Verdana, Arial, Helvetica, sans-serif;font-size:10pt;color:#000000;"><di=
v>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 whe=
n the duct between the crankcase and the can has only a small diameter, the=
n the oil cannot return to the crankcase. It means there is some blow by, b=
ut maybe the symptoms are not necessarily bad news.</div><div>Marcel<=
/div><div><br clear=3D"none"></div><hr id=3D"yiv8845066306zwchr"><div class=
=3D"yiv8845066306yqt7826991802" id=3D"yiv8845066306yqtfd94441"><div><b>Van:=
</b>"fot" <fot@autox.team.net><br clear=3D"none"><b>Aan: </b>"fot" &=
lt;fot@autox.team.net><br clear=3D"none"><b>Verzonden: </b>Woensdag 22 m=
ei 2019 04:31:47<br clear=3D"none"><b>Onderwerp: </b>[Fot] Oil Blow-by Caus=
e?<br clear=3D"none"></div><br clear=3D"none"></div><div><div class=3D"yiv8=
845066306yqt7826991802" id=3D"yiv8845066306yqtfd88235">I just had a great w=
eekend at Summit Point, perfect weather, four days and lots of track time, =
some quick laps and good racing. <div class=3D"yiv8845066306">After m=
y last session, I noticed some dripping oil as I put the car in the trailer=
.</div><div class=3D"yiv8845066306">Got it home to find a half full catch c=
an (1 pint?), and evidence of oil blowing out of the valve cover cap vent h=
ole.</div><div class=3D"yiv8845066306">Tonight I ran a compression test and=
leakdown test. Cold engine results:</div><div class=3D"yiv8845066306=
"><br class=3D"yiv8845066306" clear=3D"none"></div><div class=3D"yiv8845066=
306">1 - 200 and 2%</div><div class=3D"yiv8845066306">2- 180 and 6%</div><d=
iv class=3D"yiv8845066306">3 - 180 and 9%</div><div class=3D"yiv8845066306"=
>4 - 195 and 0%</div><div class=3D"yiv8845066306">5 - 190 and 0%</div><div =
class=3D"yiv8845066306">6 - 185 and 0%</div><div class=3D"yiv8845066306"><b=
r class=3D"yiv8845066306" clear=3D"none"></div><div class=3D"yiv8845066306"=
>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 three i=
s higher. </div><div class=3D"yiv8845066306">There was no excess oil u=
ntil the last session. Oil pressure is about 50 hot at idle and 65 - =
75 at speed, depending on RPM.</div><div class=3D"yiv8845066306">EGT readin=
gs remained in the 1200 - 1250 range across three monitored cylinders at to=
p speed</div><div class=3D"yiv8845066306">What do i have - failing rings? &=
nbsp;</div><div class=3D"yiv8845066306">Any diagnosis or tests you recommen=
d before I start pulling the thing apart would be appreciated.</div><div cl=
ass=3D"yiv8845066306"><br class=3D"yiv8845066306" clear=3D"none"></div><div=
class=3D"yiv8845066306">Triumphs racing - I=E2=80=99m sure I=E2=80=99m mis=
sing a few but this is who I remember.</div><div class=3D"yiv8845066306">TR=
3 - John Hasty, Henry Frye, John Styduhar</div><div class=3D"yiv8845066306"=
>GT6 - me, Paul King, Jason Sukey, Jay De Pol until his diff case broke</di=
v><div class=3D"yiv8845066306">Spitfire - Russ Moore, Marty Sukey, Jeff Gov=
ert, Kent Bain, others </div><div class=3D"yiv8845066306">Tr4 - Mark W=
heatley, Allen Goode, I=E2=80=99m missing at least another one</div><div cl=
ass=3D"yiv8845066306"><br class=3D"yiv8845066306" clear=3D"none"></div><div=
class=3D"yiv8845066306">Scott Janzen</div><div class=3D"yiv8845066306"><br=
class=3D"yiv8845066306" clear=3D"none"></div><br clear=3D"none">__________=
_____________________________________<br clear=3D"none">fot@autox.team.net<=
br clear=3D"none"><br clear=3D"none">http://www.fot-racing.com<br clear=3D"=
none"><br clear=3D"none">Donate: http://www.team.net/donate.html<br clear=
=3D"none">Archive: http://autox.team.net/archive http://www.team.net/piperm=
ail/fot</div><br clear=3D"none">Unsubscribe/Manage: http://autox.team.net/m=
ailman/options/fot/van.mulders.marcel@telenet.be<div class=3D"yiv8845066306=
yqt7826991802" id=3D"yiv8845066306yqtfd22369"><br clear=3D"none"></div></di=
v></div></div></div><div class=3D"yqt7826991802" id=3D"yqtfd31970">________=
_______________________________________<br clear=3D"none"><a shape=3D"rect"=
ymailto=3D"mailto:fot@autox.team.net"; href=3D"mailto:fot@autox.team.net";>f=
ot@autox.team.net</a><br clear=3D"none"><br clear=3D"none"><a shape=3D"rect=
" href=3D"http://www.fot-racing.com"; target=3D"_blank">http://www.fot-racin=
g.com</a><br clear=3D"none"><br clear=3D"none">Donate: <a shape=3D"rect" hr=
ef=3D"http://www.team.net/donate.html"; target=3D"_blank">http://www.team.ne=
t/donate.html</a><br clear=3D"none">Archive: <a shape=3D"rect" href=3D"http=
://autox.team.net/archive " target=3D"_blank">http://autox.team.net/archive=
</a><a shape=3D"rect" href=3D"http://www.team.net/pipermail/fot"; target=3D=
"_blank">http://www.team.net/pipermail/fot</a><br clear=3D"none">Unsubscrib=
e/Manage: <a shape=3D"rect" href=3D"http://autox.team.net/mailman/options/f=
ot/robertlangtr6@yahoo.com" target=3D"_blank">http://autox.team.net/mailman=
/options/fot/robertlangtr6@yahoo.com</a><br clear=3D"none"><br clear=3D"non=
e"><br clear=3D"none"></div></div>
</div>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot
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