Re: [Amc-list] Gravel at Idle

[Matt Haas <mhaas@xxxxxxx>]

Joe,

The alternator on my 68 American made a bunch of noise at idle sometimes 
before the bearings disintegrated.

Matt

On 7/2/2008 6:05 PM, Joe Fulton spouted this sage advice:
> I may have mentioned this before, but my 77 Gremlin
> 258 six/auto has developed a sound like a rock in the
> oil pan at idle.  The sound goes away when you race
> the engine.  I have listened to various parts of the
> engine and accessories with a dowel up to my ear, but
> can't really identify where the sound comes from.  The
> idle is pretty smooth now and the intermittent
> "crunch" sound doesn't seem to coincide with a drop in
> rpm.
> 
> As far as I know the oil pressure is good. I have an
> idiot light which goes out promptly on startup.  Cold
> cranking compression test last week was 160 psi on all
> cylinders so the top end seems to be healthy.  I'll
> try to listen near the flex plate/transmission later
> today to see if the sound comes from back there.  I
> don't think it's a water pump sound either, because
> the pump is not leaking a bit, but I can take off the
> fan belts and see if the sound goes away without the
> pump turning.  I already took the belt off of the air
> pump, which I thought was the source, but the sound
> doesn't change when the air pump is not turning.
> 
> Any ideas?
> 
> Joe Fulton
> 
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> 
> 

-- 
mhaas@xxxxxxx
Cincinnati, OH
http://www.mattsoldcars.com
1967 Rambler American wagon
1968 Rambler American sedan
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