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Matt, Mechanical Engineer
Category: Car
Satisfied Customers: 22897
Experience:  BEng hons Mech engineering, in auto industry 22 years
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I own a Ssangyong Musso 2.9TD 4X4. The car is Spanish registered,

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I own a Ssangyong Musso 2.9TD 4X4. The car is Spanish registered, LHD and located in Spain. I have noticed a light metallic sounding rattling noise coming from under the car. The noise is intermittent and appears to emanate from under the drivers side . Ive checked the exhaust and it appears to be solid. Any ideas Please ?

whats likely is either a loose heat shield that sits above the exhaust or a loose DPF ( diesel particulate filter ) inside its canister

try tapping the large cannister on the exhaustto see if it rattles and look above the exhaust for metal shielding thats touching the exhaust
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Customer: replied 3 years ago.

Thanks for your very helpful suggestions. I will need to get my mechanic to check for your suggested solutions before I can confirm that the problem is solved. I will get back to you after that and advise the outcome.

no problem
Customer: replied 3 years ago.

My local mechanic has checked both of your suggestions but can nothing that rattles. The heat shield is solid and tapping the exhaust canister has shown no noise. He is quite puzzled.

The only other thing I can add and its not easy to be exact when driving [ the only time the noise occurs ] is that the noise appears now to emanate from from behind the drivers side in the vicinity of the rear drivers side [LHD ] wheel. Its still intermittent and on the whole doesnt happen when driving on a smooth road. Any further ideas ?

As a non expert, the noise which is quite loud at times feels like a stone rattling in a metallic jar or 2 metal plates banging together.

Many thanks

Hi Nick

one thing you can test if is the noise get worse or better when cornering?

if it changes then I'd suggest checking over the wheel bearings and driveshaft joints

by jacking the car up so the wheel is off the ground and shake the tyre from top to bottom and from side to side (with someone holding the steering wheel). There should be no play in either direction.

Any play in 1 direction will usually require a suspension joint to be replaced, if there’s play in both directions then the wheel bearing may be at fault.

to check for a

Worn drive shaft joint - typically these won't produce any vibration unless badly damaged but they can be noisy or 'clonk' for a long time beforehand, turn the steering to full lock and look at the drive-shaft rubber boot there should be no rips or tears in it and the suspension should be clean and dry of any grease. If you reverse at a reasonable speed with the steering on full lock a worn joint will 'click'.