Subject: [Fot] Oil Blow-by Cause?

From: Scott Janzen via Fot <[email-masked]>
Date: Tue, 21 May 2019 22:31:47 -0400

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I just had a great weekend at Summit Point, perfect weather, four days =
and lots of track time, some quick laps and good racing. =20
After my last session, I noticed some dripping oil as I put the car in =
the 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 three is higher.=20
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? =20
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=20
Tr4 - Mark Wheatley, Allen Goode, I=E2=80=99m missing at least another =
one

Scott Janzen

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html; =
charset=3Dutf-8"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; line-break: after-white-space;" class=3D"">I =
just had a great weekend at Summit Point, perfect weather, four days and =
lots of track time, some quick laps and good racing. &nbsp;<div =
class=3D"">After my last session, I noticed some dripping oil as I put =
the car in the trailer.</div><div class=3D"">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 class=3D"">Tonight I ran a compression =
test and leakdown test. &nbsp;Cold engine results:</div><div =
class=3D""><br class=3D""></div><div class=3D"">1 - 200 and 2%</div><div =
class=3D"">2- 180 and 6%</div><div class=3D"">3 - 180 and 9%</div><div =
class=3D"">4 - 195 and 0%</div><div class=3D"">5 - 190 and 0%</div><div =
class=3D"">6 - 185 and 0%</div><div class=3D""><br class=3D""></div><div =
class=3D"">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. &nbsp;So, perhaps =
the leakdown on the first three is higher.&nbsp;</div><div =
class=3D"">There was no excess oil until the last session. &nbsp;Oil =
pressure is about 50 hot at idle and 65 - 75 at speed, depending on =
RPM.</div><div class=3D"">EGT readings remained in the 1200 - 1250 range =
across three monitored cylinders at top speed</div><div class=3D"">What =
do i have - failing rings? &nbsp;</div><div class=3D"">Any diagnosis or =
tests you recommend before I start pulling the thing apart would be =
appreciated.</div><div class=3D""><br class=3D""></div><div =
class=3D"">Triumphs racing - I=E2=80=99m sure I=E2=80=99m missing a few =
but this is who I remember.</div><div class=3D"">TR3 - John Hasty, Henry =
Frye, John Styduhar</div><div class=3D"">GT6 - me, Paul King, Jason =
Sukey, Jay De Pol until his diff case broke</div><div class=3D"">Spitfire =
- Russ Moore, Marty Sukey, Jeff Govert, Kent Bain, =
others&nbsp;</div><div class=3D"">Tr4 - Mark Wheatley, Allen Goode, =
I=E2=80=99m missing at least another one</div><div class=3D""><br =
class=3D""></div><div class=3D"">Scott Janzen</div><div class=3D""><br =
class=3D""></div></body></html>=

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