<VV> Idle with Rattle

[Joe West]

From pp2 at 6007.us Thu Oct 27 14:17:00 2005
From: pp2 at 6007.us (Padgett)
Date: Thu Oct 27 14:17:05 2005
<VV> Idle with Rattle
In-Reply-To: <20051027130636.0E5FF6C041@tiger.skiblack.com>
Message-ID: <5.2.0.9.2.20051027141123.01d36740@mail.bellsouth.n et>

Now that my 110/PG is idling, there is one specific RPM somewhere between
600 and 900 (est.) that causes quite a loud and very tinny rattle. Not
detonation. Little above and a little below it goes away. Any ideas what
might cause this ? (note: harmonic balancer just replaced with a new Dale
rebuilt unit).

Padgett

[Joe West]

From HiHal at adelphia.net Thu Oct 27 14:28:40 2005
From: HiHal at adelphia.net (Wade Halsey)
Date: Thu Oct 27 14:29:21 2005
<VV> Idle with Rattle
In-Reply-To: <5.2.0.9.2.20051027141123.01d36740@mail.bellsouth.n et>
References: <5.2.0.9.2.20051027141123.01d36740@mail.bellsouth.n et>
Message-ID: <43611C58.6030303@adelphia.net>

A 3 foot length of water pumper heater hose used as a stethoscope will
isolate noises from other engine sounds and make it obvious where your
problem sound is coming from.

Wade Halsey

Padgett wrote:

> Now that my 110/PG is idling, there is one specific RPM somewhere
> between 600 and 900 (est.) that causes quite a loud and very tinny
> rattle. Not detonation. Little above and a little below it goes away.
> Any ideas what might cause this ? (note: harmonic balancer just
> replaced with a new Dale rebuilt unit).


> Daniel Monasterio wrote:

After 37 years dealing with vairs, I found a new (to me) noise. Just
after changing spark plugs (Autolite 425) the engine began to make a
constant screeching noise, like moving a metalic cap (like old fashion
soft drinks) on a flat glass. The noise is constant with the engine
ruuning. The pitch is really high. Took off the belt for isolating
alternator, belt tensioner and fan bearings with no change. The noise
pitch is different from dry rocker arms, dry valve stems or a loose
bellhousing bolt against the flywheel.

> Think that changing plugs had nothing to do and was just
> coincidental. Engine is a 110 with less than 2,000 miles, no oil
> comsuption, no oil smoke.
>
> Would somebody point me on what can cause this noise ?.... thanks
> in advance for any help.

[Joe West]

From pp2 at 6007.us Thu Oct 27 17:34:24 2005
From: pp2 at 6007.us (Padgett)
Date: Thu Oct 27 17:34:30 2005
<VV> Idle with Rattle
In-Reply-To: <20051027191608.A4B556C06C@tiger.skiblack.com>
Message-ID: <5.2.0.9.2.20051027172804.018fde00@mail.bellsouth.n et>

And once again a little (well accidental) testing found the problem - went
back out to find the specific speed at which the rattle was occuring (seems
to be between 650 and 750 rpm). Happened to put foot on exhaust pipe and
rattle went away/changed. Took foot off & came back. Gonna have to "Get Out
and Get Under" after things cool down to find the pipe/shield/muffler
interference but is evidently in the exhaust system. Suspect I'll put the
doors back on the lower shrouds while there, have enough of a baseline now
& new bushings have arrived.

Was a quite alarming sound.

Padgett

[Joe West]

From Levair at aol.com Thu Oct 27 21:27:29 2005
From: Levair at aol.com (Levair@aol.com)
Date: Thu Oct 27 21:27:36 2005
<VV> Idle with Rattle
Message-ID: <d6.30c2d41b.3092d881@aol.com>

In a message dated 10/27/05 2:17:35 PM Eastern Daylight Time, pp2@6007.us
writes:

<< 600 and 900 (est.) that causes quite a loud and very tinny rattle. Not
detonation. Little above and a little below it goes away. Any ideas what
might cause this ? >>
Loose converter flex plate?