Re: thumping sound in motor

[Herb <zephyr9900@xxxxxxxxxxx>]

Alex,

I'm sure you checked the pulley bolts also.  Well next step would pull plug
wires on each cylinder while running, and see if noise goes away that would
narrow it down to the offending cylinder, if in fact you did spin a rod
bearing.  It is hard to trouble shoot with out seeing & hearing what's
happening first hand.  You say you hear the noise on every rotation of the
engine even before it starts?  Hopefully it isn't the bolts holding the
flexplate to the crank.  The only advantage to GMs is you can loosen the
converter, push it back  and see a loose bolt.  With a torqueflite it
entails a mirror a light and luck.

      
 Herb 
 
1959 Coronet 326 Poly
1963 Fury 2D/HT 6.1
1963 Sport Fury Convertible 361
1970 Challenger RT 440
1999 Durango SLT 5.9
2006 300-C Heritage 5.7
2008 SRT-8 Magnum 6.1
St. Louis, MO.
 
http://1962to1965mopar.ornocar.com/mmo42009.html
  
Only 2 defining forces have ever offered to die for you....Jesus Christ and
the American Soldier.
One died for your soul, the other for your freedom. 
 
 
 
-------Original Message-------
 
From: Alex Ariemiea
Date: 4/20/2009 12:56:58 PM
To: 1962to1965mopars@xxxxxxxxxx
Subject: Re: thumping sound in motor
 
Herb,  These bolts were all checked and looked OK.               Alex
 
--- On Mon, 4/20/09, Herb <zephyr9900@xxxxxxxxxxx> wrote:
From: Herb <zephyr9900@xxxxxxxxxxx>
Subject: Re: thumping sound in motor
To: 1962to1965mopars@xxxxxxxxxx
Date: Monday, April 20, 2009, 1:22 PM
 
 
Alex,
 
Sorry for the two messages, also check the bolt holding the vibration damper
on the front of the crankshaft and make sure it is tight.
 
     
  Herb
 
1959 Coronet 326 Poly
1963 Fury 2D/HT 6.1
1963 Sport Fury Convertible 361
1970 Challenger RT 440
1999 Durango SLT 5.9
2006 300-C Heritage 5.7
2008 SRT-8 Magnum 6.1
St. Louis, MO.
 
http://1962to1965mopar.ornocar.com/mmo42009.html
 
Only 2 defining forces have ever offered to die for you....Jesus Christ and
the American Soldier.
One died for your soul, the other for your freedom.
 
 
 
-------Original Message-------
 
From: Alex Ariemiea
Date: 4/20/2009 12:01:18 PM
To: 1962to1965mopars@xxxxxxxxxx
Subject: thumping sound in motor
 
Would anyone know what an 440 would sound like if it has a spun bearing? My
64 Dodge has a rebuilt engine that I installed last year. Whenever you try
to start it, sounds like a thumping sound once every rotation. The car
starts and idles fine and good power, but when it is running it has a
knocking sound. I can hear it better on the right side of the engine. The
motor has a good 45# of oil pressure at all times. Other than the sound it
seems to run good. I'm just afraid I might be destroying the motor.  Any
ideas where to look???  I did take the valve covers off and everything seems
ok there.                     Thanks all,   Alex in Ohio
 
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Please address private mail -- mail of interest to only one person --
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as well as other personal messages only to the intended recipient, not to
the Clubhouse public address. This practice will protect your privacy,
reduce the total volume of mail and fine tune the content signal to Mopar
topic.  Thanks!
 
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