Hollow/Rubbery rattling on Cold Start

CTsubyRS · 02-22-2011, 09:34 AM

So this morning I got in my car and started it up and immediately it sounded different, a very hollow sound. I gave it the benefit of the doubt since it was a very cold morning.
After letting it warm up I headed out and heard a hollow/rubbery rattling especially at low rpm's and downshifts. It almost sound like I had a flat tire, so I pulled over, checked my wheels and they were fine. I popped the hood and didn't see anything really out of of place or loose.
I carried on and it started up again.

My thinking was it might be the CAI, because of the rubber boot at the end of the filter and the filter itself maybe being loose and hitting something. It didn't seem loose when I popped the hood, but that would explain the hollow and rubbery sound.

Other than that I was thinking maybe a belt of some sort? I just got the air conditioning belts done maybe 3k miles ago. I am at 101k miles so maybe it's the timing belt?

It's an 05 RS, 5speed

Any help would be appreciated, thanks!

* Registered users of the site do not see these ads.

CTsubyRS · 02-22-2011, 02:45 PM

Update: so drove it again this afternoon, let it warm up for a few minutes and heard no noises. You think it was just a cold start or is this something I should get looked at?

02-22-2011, 09:34 AM	#1
CTsubyRS Scooby Newbie Member#: 181352 Join Date: Jun 2008 Chapter/Region: NESIC Vehicle: 2005 Impreza RS Black	Hollow/Rubbery rattling on Cold Start So this morning I got in my car and started it up and immediately it sounded different, a very hollow sound. I gave it the benefit of the doubt since it was a very cold morning. After letting it warm up I headed out and heard a hollow/rubbery rattling especially at low rpm's and downshifts. It almost sound like I had a flat tire, so I pulled over, checked my wheels and they were fine. I popped the hood and didn't see anything really out of of place or loose. I carried on and it started up again. My thinking was it might be the CAI, because of the rubber boot at the end of the filter and the filter itself maybe being loose and hitting something. It didn't seem loose when I popped the hood, but that would explain the hollow and rubbery sound. Other than that I was thinking maybe a belt of some sort? I just got the air conditioning belts done maybe 3k miles ago. I am at 101k miles so maybe it's the timing belt? It's an 05 RS, 5speed Any help would be appreciated, thanks! * Registered users of the site do not see these ads.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Tranny has a slight rattle on cold starts	therealratfink	Transmission (AT/MT) & Driveline	5	02-25-2010 07:32 PM
Piston slap on cold start on 05 GTL?	shaltac	Legacy Forum	7	01-18-2005 02:47 PM
stalling on cold starts	STi-Nismo Dood	Normally Aspirated with bolt-on Forced Induction Powertrain	3	01-11-2003 03:49 PM
check engine light on cold starts	Sobelizard109	Service & Maintenance	3	12-03-2002 10:46 PM

02-22-2011, 02:45 PM	#2
CTsubyRS Scooby Newbie Member#: 181352 Join Date: Jun 2008 Chapter/Region: NESIC Vehicle: 2005 Impreza RS Black	Update: so drove it again this afternoon, let it warm up for a few minutes and heard no noises. You think it was just a cold start or is this something I should get looked at?