RE: thumping sound in motor

[Jeff Adams <ledman_70@xxxxxxxxxxx>]

OK, here's another issue I've had in the past with a 350 Chevy (sorry 
for the blaspheeming). I bought the motor from a friend's Malibu because 
it ticked on and off and he tried everything to find the noise. He 
installed a new crate motor and when I tore the 350 down, it had a 
piston skirt cracked most of the way around on 1 side, which was causing 
the ticking, but wasn't bad enough to break off. A new piston took car 
of the noise. I'm sure your noise is more substantial than this, but I 
learned you never know what's making the racket sometimes till you tear 
the motor apart. In my experience it's something that never would have 
occured to me (then again I'm 53 and a LOT of things don't occur to me 
anymore)!!

ajaremea@xxxxxxxxxxx wrote:
> 
> Jeff, I pulled the valve covers and checked everything out. It all looks 
> good there.This noise is more like a knock when it running but when 
> cranking the motor its more like a ka thunk sound with each rotation. 
> Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  
> Thanks, Alex
> 
> --- On Thu, 4/23/09, Jeff Adams <ledman_70@xxxxxxxxxxx> wrote:
> From: Jeff Adams <ledman_70@xxxxxxxxxxx>
> Subject: RE: thumping sound in motor
> To: 1962to1965mopars@xxxxxxxxxx
> Date: Thursday, April 23, 2009, 2:47 PM
> 
> When I went to a larger cam and adjustable rockers on my 426 wedge, I 
> started getting a metallic clattering noise that sounded like low oil. 
> It turned out to be the rockers were a little too tall and lightly 
> hitting the baffles inside the stock steel valve covers. A few light 
> shots with a ballpeen corrected this.
> 
> ajaremea@xxxxxxxxxxx wrote:
> > 
> > Herb,  So far not so good, I drained the oil and took out the filter 
> > and didn't find any signs of metal at all. I even cut the filter open 
> > and it was minus any metal also. I tried to narrow down the sound but 
> > that didn't work out. I really don't think its the rod bearings.
> Later 
> > today I going to pull each plug wire with the motor running and see if 
> > that changes anything or can help pinpoint the noise. Someone suggested 
> > that I might have a connecting rod hitting the pan, being that I had to 
> > use my orginial 361 pan on this 440 due to the different shape of the 
> > pan. The newer pans hit the steering rod that go from one side to the 
> > other side of the car. I'll let you know what I find out as I go
> along. 
> > Any other ideas would be appreciated.
> > Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  
> > 
> > Thanks,   Alex
> > 
> > --- On Thu, 4/23/09, Herb <zephyr9900@xxxxxxxxxxx> wrote:
> > From: Herb <zephyr9900@xxxxxxxxxxx>
> > Subject: Re: thumping sound in motor
> > To: 1962to1965mopars@xxxxxxxxxx
> > Date: Thursday, April 23, 2009, 10:20 AM
> > 
> > 
> > Alex,
> > 
> > How goes it?  Hope you have good news!!
> > 
> >       
> >  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 1:54:56 PM
> > To: 1962to1965mopars@xxxxxxxxxx
> > Subject: Re: thumping sound in motor
> >  
> > Pulling the plug wires will be my next move. I'll let you know what
> > happens.   Alex
> > [Non-text portions of this message have been removed]
> > 
> > 
> > ----
> > Please address private mail -- mail of interest to only one person -- 
> > directly
> > to that person.  I.e., send parts/car transactions and negotiations 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!
> > 
> > '62 to '65 Mopar Clubhouse Discussion Guidelines:
> > http://www.1962to1965mopar.ornocar.org/mletiq.html. 
> > 
> > 
> > 
> > --
> > [Non-text portions of this message have been removed]
> > 
> 
> 
> 
> Jeff Adams
> 64 Polara
> 
> 
> ----
> Please address private mail -- mail of interest to only one person -- 
> directly
> to that person.  I.e., send parts/car transactions and negotiations 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!
> 
> '62 to '65 Mopar Clubhouse Discussion Guidelines:
> http://www.1962to1965mopar.ornocar.org/mletiq.html. 
> 
> 
> --
> [Non-text portions of this message have been removed]
> 



Jeff Adams
64 Polara


----
Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations 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!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html. 

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