[DML] Re: Odd chatter from brakes *update*

["David Teitelbaum" <jtrealty@xxxxxxxxxxx>]

It is uncommon for the decel valves to stick but from the description 
it is a possible cause. The cracked muffler bracket is more likely 
but usually dosen't make much noise, the muffler just drops and the 
pieces separate so they don't rattle against each other. Very easy to 
check, just push on the top of the muffler (when it's cold of 
course). In fact it is VERY common for that bracket to break. All of 
the venders sell an improved, more durable bracket. The old one can 
be repaired too. You should hear the noise not only on decel but also 
if you rev it up and take your foot off quickly but it would be more 
noticeable when driving. Noises are really hard to diagnose by remote 
control. You could have a serious problem with a C/V joint too and I 
would be leading you in the wrong direction! I worked with Kayo on 
his car experimenting with the decel valves, he had changed his 
exhaust and didn't like the sound so we were trying different things. 
The decel valves won't have any effect on an automatic, they are 
there mainly for the 5-speed.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Harold McElraft" <hmcelraft@xxxx> 
wrote:
> If the noise is deceleration noise as Dave T suggests I would also 
> expect it to occur when you rev the motor. When you run the motor 
up 
> to 3-4,000 RPM and let off the gas you would hear the noise.
> 
> If the noise stops when you disengage the clutch then I would look 
> for something in the drive line or motor mounts. I suggest applying 
> the parking brake and investigating the movement of the motor and 
> trans assembly with the car in reverse. This should simulate to 
some 
> extent deceleration in gear. With the car running, gently start to 
> engage the clutch first in reverse then in first gear. Repeat 
> several times and observe the movement of the engine. This will be 
> hard to observe alone and usually takes more than one person to do.
> 





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