There is a strange rattling/squeaking noise inside the trunk, driver's side, above the tire

Tiny
EDCHUI
  • MEMBER
  • 2008 SUZUKI XL7
  • 48,500 MILES
I drive 45min and 35 miles in the morning and there's no noise. Then after having the car parked for 9-10 hours, on my way back home, starts this very strange noise in the trunk, driver's side, above the tire, and it gets louder progressively. You can hear it from the inside rather than from the outside. It would sound even at full stop (in neutral or parking) and it will only stop if I turn the engine off. I'm really concern now if it's something really bad. I made an appointment at the workshop next week, but I'm afraid they won't find what the problem is. The first few days, it sounded like if a liquid were boiling, not constant and not sistematic; now, it sounds more mechanical, constant and sistematic. I'm not sure if this would have anything to do, but the previous owner used 95-octane gasoline for five years and I started using 91 octanes since 2 full tanks ago; coincidentally, the noise started during the second use of 91-octane gasoline; I did this because I found an online manual that said that 87 octanes and up was OK and the engine seems to be working just fine. I'd really appreciate any help or hints.
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Friday, September 21st, 2012 AT 4:01 AM

3 Replies

Tiny
DRCRANKNWRENCH
  • EXPERT
It could be the gas tank not venting properly. Is the gas tank filler on that side? Try getting a new gas cap.
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Friday, September 21st, 2012 AT 4:12 AM
Tiny
EDCHUI
  • MEMBER
Hi, thanks for your super fast response. Gladly, the gas tank is on the other side, the passenger side, and the gas cap seems to fit properly.
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Friday, September 21st, 2012 AT 4:21 AM
Tiny
DRCRANKNWRENCH
  • EXPERT
Even if the cap fits properly it may not be venting properly. I can't think of much else that would give you a bubbling noise back there. I would look at the rear axle and suspension components. Jack the truck up and grab the tires to check for playby pulling back and forth both side to side and top and bottom. Then check rear hinges for spare and tailgate.
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Friday, September 21st, 2012 AT 3:02 PM

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