Rubber or some sort of vibration damper?

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MrAl
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Rubber or some sort of vibration damper?

Post by MrAl » Mon Oct 27, 2008 1:02 pm

Hello there,

Recently my exaust system developed a slight looseness, where it
vibrates and makes noise and also rattles and makes a slight
banging noise. I can fix it if i had a piece of high temperature
rubber, as i could just stick it between the metal pipe and the
metal mount. I know there are other ways to do this too, but
what i really want is something that acts like rubber but has a
much higher melting temperature.

BTW, anyone have any data on the max temperature of an
exhaust pipe, roughly?

Thanks.
LEDs vs Bulbs, LEDs are winning.

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dacflyer
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Post by dacflyer » Mon Oct 27, 2008 2:10 pm

not exactly, but the farther away the exhaust is, the cooler it is..
before the catalitic converter, the temp can be around 700F or so.
and and right at the exhaust it might be as cool as 200F or so.

i seen many exhause have a u bolt looking item welded to the pipe, then a rubber doughnut connecting to another tang or bolt on the body..
i had a vibration where my muffler connected to a square bottom bracket, there was just enough play between the muffler mount and the bracket that it ratteled. i unbolted it,, added in a washed,, put it back together, and no more problems...

good luck,

gerty
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Post by gerty » Mon Oct 27, 2008 2:53 pm

They make hangers with a metal strap with bolt holes on one end and a tailpipe clamp on the other with a piece of rubber in the middle. It's a universal hanger, one size fits all.

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Dave Dixon
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Post by Dave Dixon » Tue Oct 28, 2008 4:33 am

Hi Al,
I think you can get small qty. materials from McMaster-Carr. They have excellent catalog descriptions now that you know what temps to expect (IF you can trust DacFlyer!!!). Good luck, Dave

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Externet
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Post by Externet » Tue Oct 28, 2008 6:39 am

Hi Al.
Butcher an old tire, cut the support/strap/whatever shape with a wet knife. Perhaps a figure '8' shape. It works better in tension than in compression. It should last a long time.
Miguel
- Abolish the deciBel ! -

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Janitor Tzap
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Post by Janitor Tzap » Tue Oct 28, 2008 7:59 am

I'm always amazed at you characters that roll their own parts.
Spending hours of time and effort making the part.
That could of been gotten down at the local auto parts store for a few dollars. :)

Granted...
If you live in the middle of no where, and the Part or Parts are hard to come by.
Plus, you need to get the item working as soon as possible.
Then yes, this would make sense.

But enough criticizing.

MrAl,

While your under your vehicle.
Check the Heat Shield above the Catalytic Converter.
These are made of aluminum, and salt will cause it to corrode.
Especially around the mounting bolts.
Thus, you will get a rattle from it hitting the exhaust pipe.
In most cases you can get some fender washers to add to the bolts.
Thus, holding the Heat Shield back in place.
DO NOT RUN THE VEHICLE WITHOUT THE HEAT SHIELD!
Just the heat for the Catalytic Converter alone.
Can cause the carpeting inside the passenger compartment above it to catch fire.

Check your Motor Mounts.
A broken Motor Mount will cause the engine to jump, or twist.
If you can see scraping on the exhaust pipe coming from the exhaust manifold,
and can see where the pipe is hitting the under body.
That's a sure sign that a motor mount is gone.


Well, hope I haven't ruined your day too much.


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MrAl
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Post by MrAl » Tue Oct 28, 2008 8:15 am

Hi again,

Thanks for all the ideas.


dac:
This originally had a bar across the pipe with two large O rings to hold it.
One of the brackets broke off so im looking into other ways of doing it.

gerty:
Yes, i may end up going with some store bought solution, but there isnt much
room above the pipe either so im not sure what would work yet.

Dave:
I took a look but cant seem to find anything that goes up high enough
in temperature.

Externet:
That's not a bad idea, but i dont have any old tires around unfortunately.
Also, i wanted something that could put up with touching the hot pipe
but i think i am abandoning that idea now.

Janitor:
Well, thanks for the suggestions and i'll check that other stuff too, but
in this case i know what is wrong...one of the brackets broke and that
held a large O ring. Now im looking for another way to fix it.
I'd gladly go buy another O ring, but the bracket has to
be fixed at least, so i thought i would look into other ideas first.
I even checked the motor mounts, but it's plain to see that one of
the exhaust brackets is broken off.
LEDs vs Bulbs, LEDs are winning.

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haklesup
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Post by haklesup » Tue Oct 28, 2008 12:18 pm

You can probably get it welded back together for not much $ at a local muffler shop. They usually give free estimates. How much is your time worth? I bet they have the o ring too.

Your right to take care of it now before the winter makes the potholes bigger.

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dacflyer
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Post by dacflyer » Tue Oct 28, 2008 12:38 pm

just another dumb suggestion that might work,,
what about the famous coat hanger trick, maybe wrap it around the pipe, and connect it to the rubber mount? if the rubber is still there..
even if its temporary..
good luck.

Dean Huster
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Post by Dean Huster » Wed Oct 29, 2008 5:21 am

MrAl -- I have a few old tires that I'd be glad to send you if you pay the shipping.

Janitor -- there are times I question the rolling of your own; I've done it many times when I could have bought cheaper, better, faster. But there are times when you don't know that something exists out there to fix the problem or you've hunted to no avail, so you make do. And there is a bit of pride you get in making your own replacment parts -- heck, they always had to make their own replacement parts when they were repairing muskets in 1756.

Dean
Dean Huster, Electronics Curmudgeon
Contributing Editor emeritus, "Q & A", of the former "Poptronics" magazine (formerly "Popular Electronics" and "Electronics Now" magazines).

R.I.P.

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Janitor Tzap
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Post by Janitor Tzap » Wed Oct 29, 2008 9:07 am

Dean Huster wrote:Janitor -- there are times I question the rolling of your own; I've done it many times when I could have bought cheaper, better, faster. But there are times when you don't know that something exists out there to fix the problem or you've hunted to no avail, so you make do. And there is a bit of pride you get in making your own replacment parts -- heck, they always had to make their own replacement parts when they were repairing muskets in 1756.

Dean
Well,
I'll agree too some extent of what your saying.
But the only time I will roll my own parts is....
#1) It is cheaper for me to make it, than buy a new one.
#2) Can't get the part.
Thou, several times while working on a certain VCR or TV.
I found that because it was too new.
The parts weren't yet available.
Thus, I had to make a replacement part, or find away to fix the broken part.
So as to get it back too the customer quickly.
Then about a month, or so later, the parts become available.
ARG! :mad:


Signed: Janitor Tzap

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dacflyer
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Post by dacflyer » Wed Oct 29, 2008 11:35 am

i have had a new tv here that was given to me 2 yrs ago, less than 6 months old, and the part i needed (jungle IC) was never available, and to this day its still not available..go figgure.

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Janitor Tzap
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Post by Janitor Tzap » Thu Oct 30, 2008 4:16 pm

i have had a new tv here that was given to me 2 yrs ago, less than 6 months old, and the part i needed (jungle IC) was never available, and to this day its still not available..go figgure.
Yeah,
I'm getting really disgusted with the manufacturers of these items.
They are expecting the consumer to go out, and buy a new one every two or three years.
Part support for TV's, VCR's, Radio's, Stereo's use to be at the least 7 years.
Now, if the item breaks.
Forget about repair, because the manufacturers aren't supplying parts.
Even with say the 1 year or extended warranty.
The store that you purchased the item from will simply replace it.
With the same, or comparable unit.
Broken unit ends up just getting chucked into the recycling. :x


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Bigglez
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Post by Bigglez » Thu Oct 30, 2008 5:45 pm

Janitor Tzap wrote: I'm getting really disgusted with the manufacturers of these items.
They are expecting the consumer to go out, and buy a new one every two or three years.
Part support for TV's, VCR's, Radio's, Stereo's use to be at the least 7 years.
Now, if the item breaks.
Forget about repair, because the manufacturers aren't supplying parts.
The other side of the story is that manufacturers work on
wafer thin margins and can't afford to stock spare inventory.
The consumer wants cheap products.

This problem gets passed up the chain where suppliers
are mandated to lower their prices each quarter (or not
get the business). So doing a die shrink or moving a
valuable part to an new process is the only way they
keep their heads above water. With fab-less houses
they may not get a second chance to run more product
and have to stop when the first run is over.

I agree that consumers are expected to go out and
buy new products more frequently that in the past, but
they are getting new features each time. Electronics
is not a major investment compared with years ago.
(When a Betamax VCR cost $1700 on the street...)

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MrAl
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Post by MrAl » Fri Oct 31, 2008 8:34 am

Hi Bigglez,


I have to agree to a large extent there. Prices arent that high
for many things too.

I do have another beef however, that's similar although not exactly
the same. That is, i find that manufacturers are allowing items that
are known to be defective reach the market, and they feel no remorse.

Over the past ten years 90 percent of the things i bought all had some
sort of problem, which although they still work to some degree, are
somewhat impaired when trying to use.
The latest was an LCD monitor, which has serious black level issues
and one pixel that is constantly lit up, and when i consult the manual
it says that these issues are 'acceptable' by the manufacturer.
So this tells me that although they have been doing this all along
with other products until now they have been 'hoping' that people
will put up with the defects, and now (with the LCDs) they openly
admit that they are defective to begin with and wont do anything
to correct the problem.

I think i am going to make a list of the things that i bought over the
past 10 years that were defective from the moment they left
the factory, and maybe include what the manufacturers recommendations
were for these things.

Would like to hear your thoughts on this.
LEDs vs Bulbs, LEDs are winning.

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