5ktq Chirp - Birds under the hood?

[Fred Munro]

A rear main seal that leaks air usually makes a high-pitched squeal, Larry.
Pulling the dipstick breaks the crankcase vacuum and reduces or eliminates
the noise, as can engaging and releasing the clutch ( which moves the crank
in and out a bit). I don't know that the other problems you list can be
attributed to a leaking seal.

Fred Munro
'94 S4

----- Original Message -----
From: "Larry C Leung" <l.leung at juno.com>
To: <munrof at sympatico.ca>
Cc: <ymiatgmi at hotmail.com>; <l.leung at juno.com>; <knotnook at traverse.com>;
<steve.sears at SHOESsoil-mat.on.ca>; <quattro at audifans.com>
Sent: Monday, December 17, 2001 11:05 PM
Subject: Re: 5ktq Chirp - Birds under the hood?


> Is it then possible for there to be stumbling problems, failing the
> dipstick test and annoying whirring/whining from the bell housing that is
> seal related? Anyway to tell (short of dropping the tranny)? Trying to
> see if I can make it until spring before having my TO bearing (or seal)
> and clutch done.
>
> LL - NY
>
> On Mon, 17 Dec 2001 21:34:55 -0500 "Fred Munro" <munrof at sympatico.ca>
> writes:
> >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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> >