Gas Cap Rattling from Bass - BMW 3-Series (E90 E92) Forum

inline6ix · 01-29-2013, 10:42 PM

So I've searched, read alot about people with a similar problem, and found no solutions yet. I've got a single 12" subwoofer in my trunk that sounds great and has a wonderful bass response. That said, it rattles the living crap out of my gas cap, to the point where I can hear the rattling from inside the car with the windows closed. My trunk itself doesn't rattle. My license plate doesn't even rattle, amazingly. It's all the fuel door going completely freakin' insane. I rest my finger on the door, and the rattles go away and the car sounds perfect.

I've tried facing the sub directly towards the cabin (no folding seats or ski pass), and it doesn't help. Due to the wires and the fact that it's night, I haven't experimented with more placements of the sub yet. So with all that, anyone found a solution yet? I'm seriously, genuinely considering adding velcro pads next to the spring loaded latch to hold it.

inline6ix · 03-29-2013, 11:16 AM

Just thought I would give this a good old bump, considering that I still have some troubles with that damn gas cap. I have a normal, cheapo, non ported box if it helps, and it's a bit tall to the point where its just about touching that metal bar in the top of the trunk. That might be the cause of my problems.

kaigoss69 · 03-29-2013, 11:52 AM

That's a common problem. Be glad that it's only the gas gap vibrating. It has nothing to do with the box touching the stabilizer bar. This car is well-built, with lots of reinforcement, but there is always a "weak" spot. You can go around the car and touch the panels, the spot that vibrates the most is normally near the top of the fenders, in the area of the gas cap.

I don't think there is much you can do, short of getting rid of the spring closing mechanism and using velcro to hold the cap closed...

BMVeh · 03-29-2013, 11:57 AM

trust me...be happy its that....because of my sub...my gas cap wont close now...i gotta figure out why, seems like its a common problem..

kaigoss69 · 03-29-2013, 12:51 PM

Quote:

Originally Posted by BMVeh

trust me...be happy its that....because of my sub...my gas cap wont close now...i gotta figure out why, seems like its a common problem..

You need to replace the spring closing mechanism. It's less than 15 on eBay and takes a minute to install.

BMVeh · 03-29-2013, 09:56 PM

Quote:

Originally Posted by kaigoss69

You need to replace the spring closing mechanism. It's less than 15 on eBay and takes a minute to install.

you sir are my hero...ill search around

01-29-2013, 10:42 PM	#1
inline6ix Private First Class Drives: Deep Green E90 325i Join Date: Dec 2012 Location: Orlando, Florida Posts: 146 iTrader: (0) Garage List 2006 BMW 325i [0.00]	Gas Cap Rattling from Bass So I've searched, read alot about people with a similar problem, and found no solutions yet. I've got a single 12" subwoofer in my trunk that sounds great and has a wonderful bass response. That said, it rattles the living crap out of my gas cap, to the point where I can hear the rattling from inside the car with the windows closed. My trunk itself doesn't rattle. My license plate doesn't even rattle, amazingly. It's all the fuel door going completely freakin' insane. I rest my finger on the door, and the rattles go away and the car sounds perfect. I've tried facing the sub directly towards the cabin (no folding seats or ski pass), and it doesn't help. Due to the wires and the fact that it's night, I haven't experimented with more placements of the sub yet. So with all that, anyone found a solution yet? I'm seriously, genuinely considering adding velcro pads next to the spring loaded latch to hold it. __________________ 18" Staggered Style 189 - BMS 15mm - CF Grilles - LCI Headlights - BMW Performance CF Intake - 12" Blaupunkt Subwoofer
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03-29-2013, 11:16 AM	#2
inline6ix Private First Class Drives: Deep Green E90 325i Join Date: Dec 2012 Location: Orlando, Florida Posts: 146 iTrader: (0) Garage List 2006 BMW 325i [0.00]	Just thought I would give this a good old bump, considering that I still have some troubles with that damn gas cap. I have a normal, cheapo, non ported box if it helps, and it's a bit tall to the point where its just about touching that metal bar in the top of the trunk. That might be the cause of my problems. __________________ 18" Staggered Style 189 - BMS 15mm - CF Grilles - LCI Headlights - BMW Performance CF Intake - 12" Blaupunkt Subwoofer

03-29-2013, 11:52 AM	#3
kaigoss69 Colonel Drives: '08 335i Join Date: Jul 2008 Location: SC Posts: 2,269 iTrader: (5)	That's a common problem. Be glad that it's only the gas gap vibrating. It has nothing to do with the box touching the stabilizer bar. This car is well-built, with lots of reinforcement, but there is always a "weak" spot. You can go around the car and touch the panels, the spot that vibrates the most is normally near the top of the fenders, in the area of the gas cap. I don't think there is much you can do, short of getting rid of the spring closing mechanism and using velcro to hold the cap closed... __________________ Mobridge DA2 > JBL MS-8 > JL Audio HD600/4 > (3) Hybrid Audio L3SE & (2) Rainbow Cal25; JL Audio HD900/5 > (2) Morel HCW-10 & (1) AE SBP15

03-29-2013, 11:57 AM	#4
BMVeh First Lieutenant Drives: 2006 330i Join Date: Apr 2012 Location: Tampa, FL Posts: 356 iTrader: (3)	trust me...be happy its that....because of my sub...my gas cap wont close now...i gotta figure out why, seems like its a common problem.. __________________ 06 330i SGM

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