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21-06-2007, 11:44 AM
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Starter Motor
Join Date: Jun 2007
Posts: 4
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I have an AU Falcon 1999 and there is a knocking noise under the car.
Our mechanic thinks it could be the buffers in the fuel tank that have come loose and making the noise.' We have the car converted to gas so I don't use the petrol very often and I thought maybe the buffers could have dried out so have filled the tank up and the noise is still there. Can anyone come up with any other ideas. |
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21-06-2007, 08:15 PM
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#2 | ||
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Regular Member
Join Date: Feb 2006
Posts: 53
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How often does it knock? Does it knock all the time no matter what surface you drive on? Or does it only occur when going over bumps etc...?
__________________
1998 AU Falcon Forte (Galaxy Blue, Sedan, 2.5" Lukey cat-back sports exhaust - single muffler, 17" ROH Wheels, 235/45/17 tyres, Low Suspension, Rear Spoiler, XR6T Intake Snorkel, K&N Panel Filter) |
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21-06-2007, 11:36 PM
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#3 | ||
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FF.Com.Au Hardcore
Join Date: May 2006
Location: Perth, South
Posts: 3,064
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and where under the car, front, middle, back more to one side? need some more info
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22-06-2007, 02:36 PM
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#4 | ||
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Starter Motor
Join Date: Jun 2007
Posts: 4
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It is on most surfaces. We have had all new shock absorbers put in and it is still the same.
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22-06-2007, 02:37 PM
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#5 | |||
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Starter Motor
Join Date: Jun 2007
Posts: 4
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Quote:
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22-06-2007, 09:07 PM
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#6 | ||
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FF.Com.Au Hardcore
Join Date: May 2006
Location: Perth, South
Posts: 3,064
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it's not the exhaust hitting the body is it? or the spare wheel well, or maybe a loose spare wheel?
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22-06-2007, 11:02 PM
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#7 | ||
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Tyre Shredn
Join Date: May 2007
Location: hillside
Posts: 162
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it could be the resignator has slide back a little out of the centre muffler and is hitting the rear axle? and if it happens when u go on and of the accelorator it could be the spacer in the diff is worn.
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23-06-2007, 09:08 AM
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#8 | ||
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Banned
Join Date: Jan 2005
Location: Qld Moderator
Posts: 3,731
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also try the rear shock mounts, were they replaced? checked? with the new shocks etc. Try the sway bars and their mounting points too.
Not sure on buffers in the tank, when i pulled my tank out didnt see any. |
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23-06-2007, 10:01 AM
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#9 | ||
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Walking with God
Join Date: Mar 2005
Location: Melbourne
Posts: 7,321
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Would his mechanic be talking about "baffles" in the tank?
GK
__________________
2009 Mondeo Zetec TDCi - Moondust Silver 2015 Kia Sorento Platinum - Snow White Pearl 2001 Ducati Monster 900Sie - Red Now gone! 1999 AU1 Futura Wagon - Sparkling Burgundy On LPG Want a Full Life? John 10:10 |
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24-06-2007, 01:37 AM
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#10 | ||
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Fordless
Join Date: Dec 2004
Location: Sydney
Posts: 2,122
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A bit off topic but I got in my car yesterday at the shops & as soon as I started driving noticed a shocking knocking noise & found all my wheel nuts had been undone apart from my lock nuts so I can only assume someone tried to steal my wheels & couldn't get the lock nuts off. I obviously wasn't happy but when I was thinking about it later I would have preferred to come back to a car with no wheels then if they'd came off while I was driving & crashed.
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24-06-2007, 07:39 PM
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#11 | ||
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Regular Member
Join Date: Dec 2005
Location: Victoria!
Posts: 348
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I have an under car noise as well. Its a very tinny tapping rattle sort of a noise, and comes from the drivers side. It occurs whenever I go over any sort of a bump, and is driving me insane! Have checked all bolts, bracket and mounting etc! Sounds similar to what Mimmy has!
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Knocking noise under car
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