jrodb1735 Posted August 13, 2009 Share Posted August 13, 2009 My 2003 Subaru Legacy L (2.5L, 5 speed manual) has been a phenomenal vehicle for me. Acquired it with 35k miles and now has 122k miles. I am currently experiencing an exhaust rattle. It happens only at 2100 rpm. I viewed the car from underneath while my friend revved it to 2100 rpm and I have isolated the rattle to one specific pipe. The pipe is the passenger side half of the y pipe that comes directly out of the motor. All three of the bolts are snug, and I can't seem to figure out why it is loose. Has anyone had this issue with their vehicle? I am thinking that I can easily replace that one section of exhaust pipe, but I couldn't easily locate a replacement part. Does anyone have any suggestions? Do I need to replace the whole exhaust system (which is in otherwise good conditon)? Any advice would be greatly appreciated. Thanks! Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 13, 2009 Share Posted August 13, 2009 Remove the y-pipe and isolate the problem. It is likely to be the inner pipe - that section is double-layered, or a heat sheild. Tack weld the offending bits in place and reinstall. Should be a simple fix - no reason to replace it if it's not leaking and is otherwise functioning normally - they are pretty expensive from the dealer - probably $200 to $300 or more. GD Link to comment Share on other sites More sharing options...
Olnick Posted August 13, 2009 Share Posted August 13, 2009 Welcome jrodb1735. Please post your question in the New Generation forum. Link to comment Share on other sites More sharing options...
Rooster2 Posted August 13, 2009 Share Posted August 13, 2009 Does the section of the Y pipe have a shroud covering it? If so, I would suspect that a portion of the shroud has come loose, and is vibrating. I have had this problem on both of my OB Wagons. I had a friend rev the motor up to the rpm that resulted in the rattle sound, then hold that rev so the sound would continue. Then, I crawled under the car and pushed/pulled on the shroud with my gloved hand and a screw driver until I found which portion of the shroud was loose. I cured the problem by hammering in a bolt as a wedge between the pipe and shroud to prevent the shroud from vibrating. Other guys have used a screw type hose clamp over the shroud to stop the vibration. Hope this info helps! Link to comment Share on other sites More sharing options...
nipper Posted August 13, 2009 Share Posted August 13, 2009 Welcome to the land of subarus. Its a heat shiled easily fixed with vice-grips or a large hose clamp. nipper Link to comment Share on other sites More sharing options...
GeneralDisorder Posted August 13, 2009 Share Posted August 13, 2009 Its a heat shiled easily fixed with vice-grips or a large hose clamp. Sheet metal vibrations - sometimes a well placed blow with a ball-peen hammer will cure it. We had a customer with a pump that made a "strange noise" - the tech listened carefully to it..... went out to the truck and got his ball-peen hammer - smacked the motor fan shround with it one time.... no charge. GD Link to comment Share on other sites More sharing options...
Fairtax4me Posted August 14, 2009 Share Posted August 14, 2009 Sink a couple 3/4" long self tapping sheet metal screws into it at either end and that should cure it. Link to comment Share on other sites More sharing options...
Lefty Posted August 14, 2009 Share Posted August 14, 2009 I have the same noice/resonance when the fan kicks in while Parked. It surely sounds like vibrating sheet metal. Any ideas where exectly this could be coming from? Link to comment Share on other sites More sharing options...
johnceggleston Posted August 14, 2009 Share Posted August 14, 2009 I have the same noice/resonance when the fan kicks in while Parked. It surely sounds like vibrating sheet metal. Any ideas where exectly this could be coming from? post #10 here, lots of good info , keep it as a reference. http://www.ultimatesubaru.org/forum/showthread.php?t=51554 Link to comment Share on other sites More sharing options...
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