Car trouble caused by ruster muffler?

[Peretz]

A few weeks ago, I was in my car and pulling out of my apartment complex when I thought I heard an airplane flying overhead. I soon realized my car was making the sound, but only when first accelerating. Once the car reached approximately 25 mph, the noise stopped.

I thought the issue might be low tire air pressure, so I checked my tires. Air pressure was normal.

I thought the issue might be a part dragging on the ground. When my car was stopped, I looked underneath and nothing seemed to be hanging low.

The sound has continued up until 25 mph for the last few weeks, but today, when pulling out of another parking lot, my car made an awful high-pitched squeal. The sounds stopped a minute later, but the experience was unsettling and the rumbling sound from before persisted while below a certain speed.

When I arrived home today, I looked under my car again and noticed my car’s muffler was rusted:

http://www.brainstormwarning.org/wpg2?g2_itemId=2016

http://www.brainstormwarning.org/wpg2?g2_itemId=2018

Is it likely a rusted muffler is the culprit? If so, what would be the least expensive (yet still safe) solution? I’ve been unemployed for the better part of two years and the job I work now only lasts until the project ends.

Any advice is greatly appreciated.

[loystock]

You obviously need a new muffler. You can ask your co-workers/friends for a decent shop near you. But a broken muffler does not squeal. You may have a problem with Idler Pulley or bearings in the engine compartment. You can use a mechanic's stethoscope (@ $10) or improvise using a long screw driver (DO NOT USE ON MOVING PARTS) to locate source of noise.It could also be from the A/C compressor/clutch. So turn ON/OFF the AC and see if the noise comes back with the A/C on.

[Peretz]

I took my car to a local auto repair shop and, while my muffler indeed looks rough, it is not leaking. The problem causing the awful sounds is instead with the rear brakes. It doesn't take a mechanic to know that's not good.

This is very bad news as the ballpark estimate for repairing the issue is considerably more than the cost of installing a new muffler.

[loystock]

Did he say exactly what's causing the rear brake to squeal? It could be that brake pads are just worn out (2mm minimum). It's not difficult to replace but you need a brake piston adapter (@ $10) to 'turn in' (not push in) the piston after replacing the pads. We can give you instructions on how to replace them. Total cost should be < $100 if you do it yourself.