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Old 04-20-2017, 09:32 PM   #1
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Loud exhaust.

Unwanted loud exhaust.


First noticed a few months ago ... if i rev the engine ... on the way back down around 2,000rpm would get a little gurgle sound. has been getting louder over time, but now it's bad.

Now, past day or two, car is loud as F. Getting louder. Sounds like one of those ricer cars around 2,000-2,500rpm. do not like.

Lack of performance, sputtering, gurgling sound. I imagine this is an exhaust system issue, but I'm scared because of one reason.

the noise does not happen in reverse. happens in neutral and drive gears. car at 105k kilometers. What do you think is dying here? know nothing, but how it doesn't happen in reverse has me worried it's something transmission.


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Old 04-20-2017, 09:42 PM   #2
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Exhaust has nothing to do w/ the trans. Does it run & sift good? Could very well be a rotted out muffler.
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Old 04-20-2017, 09:48 PM   #3
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Exhaust has nothing to do w/ the trans. Does it run & sift good? Could very well be a rotted out muffler.
well, that's something i can cope with. runs and shifts as it normally would. the noise i actually kind of like. would be nice if someone could explain in basic terms why its not happening in reverse.
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Old 04-20-2017, 09:49 PM   #4
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well, that's something i can cope with. runs and shifts as it normally would. the noise i actually kind of like. would be nice if someone could explain in basic terms why its not happening in reverse.
IDK, could be your going slow in reverse...
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Old 04-20-2017, 09:55 PM   #5
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Look into the leak, could be the engine moving when in gear and closing the leak.

Easier terms: When an automatic transmission is in a gear the rubber mounts allow the engine to move slightly, which would move the exhaust with it, while the back part is held in place by hangers so it's getting pulled apart in drive, then pushed together in reverse
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Old 04-20-2017, 10:42 PM   #6
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Our transverse engines up front are the worst for this, so much so that a 'flex pipe' section of the exhaust is needed so they don't break apart quickly from metal fatigue.

Imagine an old front engine RWD setup, the engine rocks side to side and the exh. twists with it, not much load on anything there with soft exh. mounts.

Now put the engine sideways at the end of the same exh. pipe. Rocking forward & back bends that pipe. It can also push back & forth on it, adding stress at connections/mufflers.
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Old 04-20-2017, 11:23 PM   #7
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Take a good look at the flanges, usually a weak spot
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Old 04-20-2017, 11:25 PM   #8
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I had a center clamp rust out on my FS Werks system on my last car. It would just rattle something terrible and open and close on acceleration
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Old 04-20-2017, 11:34 PM   #9
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Broken core in the catalytic converter maybe?

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Old 04-21-2017, 04:01 AM   #10
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Engine torquing up one way like said to make more noise as it opens the crack wider and less the other way.

In drive the engine rotates clockwise as looking at it from the driver end, that pulls more on the pipe, reverse rotates the opposite direction and closes the crack off by pushing back on rest of pipe.
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