Miatapower List Archive

This read-only message was archived from a public mail list.
Mail From: (email redacted)

I would have expected the cam cover stuffing to hold the oil back...

I'm using a rectangular GReddy oil catch tank. It seems to work. I just
drained it last week, and after months and thousands of miles of driving there
was about an ounce - maybe two - of oil in the catch tank.

This read-only message was archived from a public mail list.
Mail From: "Jason C" <(email redacted)>

.. on the driver's side, which is connected to between the air filter and
the turbo inlet. I used to have slight wetness there, now it's
significantly more. This is after I rebuilt the motor. Motor does not have
measurable oil consumption.
During the rebuild, I opened up the cam cover baffles, feeling clever, and
stuffed it with copper scrubbers and Fram crankcase filter material. It's
mostly copper scrubbers, and the Fram filter stuff sits only at the holes
that lead to the PCV valve and cam cover breather. My objective was to get
rid of the catch can that sat between the PCV valve and the intake manifold.
I used RTV on the little lids of the cam cover baffle chambers.

Any thoughts? The engine runs stronger than stock (mild headwork and
reduced compression), and leakdown #'s are very good. Today I checked valve
lash, and saw nothing unusual with the baffles and their lids.

Cheers.

This read-only message was archived from a public mail list.
Mail From: "Robert Mangas" <(email redacted)>


The issue is either blowby (which you seem to doubt and one could hardly
blame you) or more vacuum on the pre-turbo (driver) side than the intake
manifold side. In a correctly operating system, the driver's side is meant
to be make up air, so obviously you have reverse flow.

Could it be that all your stuffing is too restrictive?

Could also be a bad PCV valve allowing backflow under boost.

Robert

>From: "Jason C" <(email redacted)>
>To: <(email redacted)>
>Subject: oil coming out cam cover breather
>Date: Thu, 29 Jul 2004 00:59:12 -0700
>
>.. on the driver's side, which is connected to between the air filter and
>the turbo inlet. I used to have slight wetness there, now it's
>significantly more. This is after I rebuilt the motor. Motor does not
>have
>measurable oil consumption.
>During the rebuild, I opened up the cam cover baffles, feeling clever, and
>stuffed it with copper scrubbers and Fram crankcase filter material. It's
>mostly copper scrubbers, and the Fram filter stuff sits only at the holes
>that lead to the PCV valve and cam cover breather. My objective was to get
>rid of the catch can that sat between the PCV valve and the intake
>manifold.
>I used RTV on the little lids of the cam cover baffle chambers.
>
>Any thoughts? The engine runs stronger than stock (mild headwork and
>reduced compression), and leakdown #'s are very good. Today I checked
>valve
>lash, and saw nothing unusual with the baffles and their lids.
>
>Cheers.
>
>
>

_________________________________________________________________
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This read-only message was archived from a public mail list.
Mail From: "Larry Alster" <(email redacted)>

The MS turbo car comes from the factory with a catch can. I guess Mazda ex=
pected to see oil out the vent.

Larry

White Knight 1991 Crystal White #99 CSP
Silver Bullet 1992 Silverstone #17 EM FM I+ Turbo
Honey B 1992 Sunburst Yellow
Whooosh 2004 Titanium MazdaSpeed MX5

LowCountry Miata lowcountrymiataclub.net
Masters Miata
RAGS 074

----- Original Message -----=20
From: (email redacted)=20
To: (email redacted)=20
Sent: Thursday, July 29, 2004 3:57 AM
Subject: Re: oil coming out cam cover breather


I would have expected the cam cover stuffing to hold the oil back...

I'm using a rectangular GReddy oil catch tank. It seems to work. I just=
drained it last week, and after months and thousands of miles of driving t=
here was about an ounce - maybe two - of oil in the catch tank.

This read-only message was archived from a public mail list.
Mail From: Bill Cardell <(email redacted)>

Or you might have restriction in the air filter making it pull a vacuum
where your hose goes into the comp inlet pipe.

Bill Cardell (TurboDog's Dad)
(email redacted)
Flyin' Miata
1-800-359-6957 (sales only)
970-242-3800 (tech support)
flyinmiata.com=20


-----Original Message-----
From: Robert Mangas [mailto:(email redacted)]
Sent: Thursday, July 29, 2004 4:19 AM
To: (email redacted); (email redacted)
Subject: RE: oil coming out cam cover breather



The issue is either blowby (which you seem to doubt and one could hardly=
=20
blame you) or more vacuum on the pre-turbo (driver) side than the intake=20
manifold side. In a correctly operating system, the driver's side is meant

to be make up air, so obviously you have reverse flow.

Could it be that all your stuffing is too restrictive?

Could also be a bad PCV valve allowing backflow under boost.

Robert

>From: "Jason C" <(email redacted)>
>To: <(email redacted)>
>Subject: oil coming out cam cover breather
>Date: Thu, 29 Jul 2004 00:59:12 -0700
>
>.. on the driver's side, which is connected to between the air filter and
>the turbo inlet. I used to have slight wetness there, now it's
>significantly more. This is after I rebuilt the motor. Motor does not=20
>have
>measurable oil consumption.
>During the rebuild, I opened up the cam cover baffles, feeling clever, and
>stuffed it with copper scrubbers and Fram crankcase filter material. It's
>mostly copper scrubbers, and the Fram filter stuff sits only at the holes
>that lead to the PCV valve and cam cover breather. My objective was to get
>rid of the catch can that sat between the PCV valve and the intake=20
>manifold.
>I used RTV on the little lids of the cam cover baffle chambers.
>
>Any thoughts? The engine runs stronger than stock (mild headwork and
>reduced compression), and leakdown #'s are very good. Today I checked=20
>valve
>lash, and saw nothing unusual with the baffles and their lids.
>
>Cheers.
>
>
>

_________________________________________________________________
Is your PC infected? Get a FREE online computer virus scan from McAfee=AE=
=20
Security. clinic.mcafee.com/clinic/ibuy/campaign.asp?cid=3D3963

This read-only message was archived from a public mail list.
Mail From: Jason C <(email redacted)>

That's a good one, however, it's a fat 6" length of
tubing from the K&N cone to the compressor inlet.

Also, I noticed it was doing it before I installed the
turbo, so it's probably not just the PCV valve letting
boost in. (smart of me not to fix it, it's probably
started coating the intercooler tubes :-( )

Perhaps the stuffing going from the PCV valve to the
intake manifold is too restrictive and is not letting
blowby get sucked.



--- Bill Cardell <(email redacted)> wrote:

> Or you might have restriction in the air filter
> making it pull a vacuum
> where your hose goes into the comp inlet pipe.
>
> Bill Cardell (TurboDog's Dad)
>
>
> -----Original Message-----
> From: Robert Mangas
>
>
>
> The issue is either blowby (which you seem to
> doubt and one could hardly
> blame you) or more vacuum on the pre-turbo (driver)
> side than the intake
> manifold side. In a correctly operating system,
> the driver's side is meant
>
> to be make up air, so obviously you have reverse
> flow.
>
> Could it be that all your stuffing is too
> restrictive?
>
> Could also be a bad PCV valve allowing backflow
> under boost.
>
> Robert
>
> >From: "Jason C" <(email redacted)>
> >
> >.. on the driver's side, which is connected to
> between the air filter and
> >the turbo inlet. I used to have slight wetness
> there, now it's
> >significantly more. This is after I rebuilt the
> motor. Motor does not
> >have
> >measurable oil consumption.
> >During the rebuild, I opened up the cam cover
> baffles, feeling clever, and
> >stuffed it with copper scrubbers and Fram crankcase
> filter material. It's
> >mostly copper scrubbers, and the Fram filter stuff
> sits only at the holes
> >that lead to the PCV valve and cam cover breather.
> My objective was to get
> >rid of the catch can that sat between the PCV valve
> and the intake
> >manifold.
> >I used RTV on the little lids of the cam cover
> baffle chambers.
> >
> >Any thoughts? The engine runs stronger than stock
> (mild headwork and
> >reduced compression), and leakdown #'s are very
> good. Today I checked
> >valve
> >lash, and saw nothing unusual with the baffles and
> their lids.
> >
> >Cheers.
> >