A rattle type noise may develop from one of the exhaust heat shields. Replacement of the affected heat shield may be required to correct this issue.Google+
Car Problem Reports
Mitsubishi Galant Rattle Nosie From Exhaust Heat Shield
Mitsubishi Galant Problem
Exhaust & Emissions Affected: 2.4L 4 Cylinder
Average Mileage: 70,775 mi (13,000 mi - 156,000 mi)
Visitor, 2004 Mitsubishi Galant, 65,000 mi
my local independent repair shop simply removed the heat shield.
Visitor, 2008 Mitsubishi Galant, 48,000 mi
A rattle (vibration) noise when car is idling and when you accelerate.
Visitor, 2011 Mitsubishi Galant, 50,000 mi
Exhaust heat shiel rusted through on clamp closer to engine. Rattles almost constantly
Visitor, 2006 Mitsubishi Galant, 96,000 mi
Shield at exhaust manifold rattles when cold.
Visitor, 2007 Mitsubishi Galant, 13,000 mi
I too had the rattle noise from a heat shield. The dealer corrected the problem.
Visitor, 2008 Mitsubishi Galant, 54,000 mi
Noise in rear. Mitsubishi dealer thought it was muffler hitting trailer hitch. Only happens when I travel for some time so I believe that heat has something to deal with it.
Visitor, 2009 Mitsubishi Galant, 45,000 mi
Repair heat shield by finding exactly where the vibration is coming from, replace heat shield or
repair by welding the lose part of the heat shield.
Visitor, 2011 Mitsubishi Galant, 29,000 mi
heard the rattle. independent dealer removed it. He is calling Mits. to see if warranted. Has not been repaired yet. No idea how this will progress...betting mits won't cover it.
Visitor, 2004 Mitsubishi Galant, 115,000 mi
Loud rattle noise coming from the heat shield. More noticeable when RPM's get higher between each gear. I tried clamps and exhaust wrap, but nothing would stop the rattle!
Visitor, 2007 Mitsubishi Galant, 72,000 mi
I had a rattle that continued to get worse as I reached approximately 2400-2600 RPMs no matter what gear I was in. This was more annoying than anything else. I had the local shop rip it off the bottom and no vibrations or noise since.