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From: "William Schertz wschertz343@gmail.com" <flyrotary@lancaironline.net>
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Date: Sun, 22 May 2022 21:57:42 -0600
Message-ID: <CAOgm+a5HxciunaQhOkQrkYbhBV2c2W0DtjdFbzHtnjyu1==B7w@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Coolant leaking into combustion chamber.
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary="0000000000004c3b6b05dfa5d891"

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Some people used too big of o-rings inadvertently, and when the engine got
hot, they expanded enough to break out the cast iron edge of the groove.
Bill Schertz

On Sun, May 22, 2022 at 9:12 PM David COOK hoursaway1@comcast.net <
flyrotary@lancaironline.net> wrote:

> Fresh rebuild, two hrs. of test run time, coolant in combustion chamber
> from-?, confirmed with exhaust removal and borescope. During rebuild irons
> were inspected, resurfaced and surface rehardened. Thoughts at this point:
> I messed up and pinched a seal ( 35 years professional automotive repair,
> automatic trans, computer controlled sys. specialist, was very meticulous
> about housing mating ) or cracked rotor housing, was seeing coolant coming
> from bottom of exhaust at housing after run. Any other thoughts welcome.
> Removing eng., again, now.                                  David R. Cook
> RV6A Rotary.
>

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Content-Transfer-Encoding: quoted-printable

<div dir=3D"ltr">Some people used too big of o-rings inadvertently, and whe=
n the engine got hot, they expanded enough to break out the cast iron edge =
of the groove.<div>Bill Schertz</div></div><br><div class=3D"gmail_quote"><=
div dir=3D"ltr" class=3D"gmail_attr">On Sun, May 22, 2022 at 9:12 PM David =
COOK <a href=3D"mailto:hoursaway1@comcast.net">hoursaway1@comcast.net</a> &=
lt;<a href=3D"mailto:flyrotary@lancaironline.net">flyrotary@lancaironline.n=
et</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=3D"margi=
n:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex=
"><u></u>

 =20
  =20
=20
 <div>
  <div style=3D"font-size:12pt;font-family:helvetica,arial,sans-serif;color=
:rgb(51,51,51)">
   Fresh rebuild, two hrs. of test run time, coolant in combustion chamber =
from-?, confirmed with exhaust removal and borescope. During rebuild irons =
were inspected, resurfaced and surface rehardened. Thoughts at this point: =
I messed up and pinched a seal ( 35 years professional automotive repair, a=
utomatic trans, computer controlled sys. specialist, was very meticulous ab=
out housing mating ) or cracked rotor housing, was seeing coolant coming fr=
om bottom of exhaust at housing after run. Any other thoughts welcome. Remo=
ving eng., again, now.=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 David R.=
 Cook=C2=A0 RV6A Rotary.
  </div>
 </div>
</blockquote></div>

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