[Chrysler300] Re: Exhaust System Noise -- Causes Determined

["Michael Reed" <mrreed@xxxxxxxxxxxxxx>]

--- In Chrysler300@xxxxxxxxxxxxxxx, c300c@xxxx wrote:
> Hi Mike!
>  
> Please share the solutions with the rest of us! Thanks!
>  
> 300'ly, Gary Hagy in Hamburg, Pa (temporarily in Albuquerque, New  
Mexico)

The causes of the exhaust systems noises I posted about yesterday 
have been determined:
  
The metal-to-metal rattling appears to be the left exhaust pipe 
hitting the torsion bar. Eileen's pipe is as it is, but there is 
only about 1/16 - 3/32"" clearance between the pipe and the bar. 
We're going to flatten the pipe a bit right in that area to increase 
the clearance.
 
The "rubbing" sound was the shock on the right side rubbing on the 
exhaust pipe - the nearly vertical front part of the loop over the 
axle. Both sides of the axles had also contacted the top of the 
loop -- he didn't realize he needed for the pipes to be bent so the 
loop was almost to the body sheet metal. He's going to make new tail 
pipes this coming week.
 
None of the pipes or mufflers appear anywhere near close enough to 
the frame rails or body sheet metal to make contact, and there is no 
indication any contact has occurred. Each exhaust assembly is rock 
solid.
 
Incidentally, the motor mounts look to be in excellent, perfect 
condition. Engine doesn't move noticeably when revved in gear with 
the brakes on. Don't know if they were replaced when the car was 
restored 26 years ago or not.

Mike





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