5ktq Chirp - Birds under the hood?

[Fred Munro]

The front and rear seals are designed to keep oil in - oil pressure gets
behind the lip and forces it down on the shaft. While it is possible for the
seals to leak oil prodigiously, they can leak air in more easily than leak
oil out, so you can have a rear seal leaking air in to break crankcase
vacuum while not leaking oil out.
It's a bit different with the front seal on the I5 - from what I recall,
that's sealing the oil pump.

Fred Munro
'94 S4

----- Original Message -----
From: "Larry C Leung" <l.leung at juno.com>
To: <ymiatgmi at hotmail.com>
Cc: <knotnook at traverse.com>; <steve.sears at SHOESsoil-mat.on.ca>;
<quattro at audifans.com>
Sent: Monday, December 17, 2001 6:39 PM
Subject: Re: 5ktq Chirp - Birds under the hood?


> I've been told by the local tech a rear (or front, for that matter,
> though that's MUCH easier to get to) main seal would leak oil like
> there's no tomorrow. Any BTDT or knowledge on this?
>
> LL - NY
>
> On Mon, 17 Dec 2001 14:15:12 -0500 "Seth Noble" <ymiatgmi at hotmail.com>
> writes:
> >i remember reading something at intendedacceleration.com about this
> >problem.
> >it was the rear main seal. this could also follow the line of your
> >problem
> >not exactly fluxuating with rpm, but rather oil pressure, possibly.??
> >just a
> >thought. check out the website.
> >-seth
> >'88 ktcstq
> >
> >
> >>From: Kneale Brownson <knotnook at traverse.com>
> >>To: "Steve Sears" <steve.sears at SHOESsoil-mat.on.ca>,
> ><quattro at audifans.com>
> >>Subject: Re: 5ktq Chirp - Birds under the hood?
> >>Date: Mon, 17 Dec 2001 13:10:59 -0500
> >>
> >>--
> >>One source of chirping I've read about here is seals sucking air.
> >Might
> >>not increase with engine speed increases.
> >>
> >>
> >>At 11:20 AM 12/17/2001 -0500, Steve Sears wrote:
> >>
> >> >Hi All,
> >> >The "Snowmobile" - '87 5kTQ - is making a chirping noise mostly
> >when
> >>warmed
> >> >up.  I have searched the archives and only read about the water
> >pump
> >>making
> >> >this sound when warming up.
> >> >Spraying belt dressing on the ps/alt belts had no effect (other
> >than
> >>making
> >> >a mess)
> >> >Noise frequency is about 1.25/second
> >> >Increasing rpm to 3000 does not increase frequency (chirping is
> >quieter,
> >> >however), but when returning to 1000 rpm idle chirp frequency
> >increases
> >>(I'd
> >> >say, doubles) for a couple of seconds, before idle is stabilized at
> >about
> >> >800/900 rpm.
> >> >(Side note - ya gotta love the sound deadening in these cars - I
> >only
> >>hear
> >> >these warning sounds when I'm in the drivethru line....maybe I
> >should
> >>turn
> >> >down the audiomechanic(TM) a bit...)
> >> >So - wasserpump?  exhaust manifold?  Turbo?  Sparrows?
> >> >Cheers!
> >> >Steve Sears
> >> >1987 5kTQ
> >> >1980 5k
> >> >1962 and '64 Auto Union DKW Junior deLuxes
> >> >[SPAM Blocker Note: Remove SHOES to reply]
> >>--
> >>
> >
> >
> >
> >
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