Low Frequency Knocking sound dependent on speed

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21 Apr 2010
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Hey Motors forum,

I have a Mitsubishi Galant 2.5l, 24 valve, V6 sport manual (lovely car - manual is rare in the UK) but its a bit old (X-reg) and has done 130K miles so it's getting on a bit.

The engine is a peach and runs a smooth as butter but recently I have noticed a low frequency knocking noise coming from the front drivers side that increases in "knocks per minute" dependent on speed but totally independent on engine revs/clutch position or application of brakes - and its getting worse. Must be the running chain I reckon.

I have checked all the wheel bearings and all seem tight. Its difficult to get under the car as its a bit low (sport model) and I don't have a decent jack :(

I'm thinking it likely a gaitor failure leading to driveshaft bearing wear? Any other suggestions as to cause?

I'm planning on booking it into a local garage to diagnose it, but the cars not worth much any more, maybe a grand and a half at best for a collector, so I'm trying to work out the risk of me having to write it off and buy another car.

I would like to keep it running for as long as possible the engine is worth the fuel consumption ;) Any other suggestions as to what it may be so I can cost potential repairs?

Cheers for any help.

Red
 
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They are known for wear on the bushes on the top of the front struts and also drop links. this will increase in noise the faster you go and tend to be a low frequency knock, or could be a ball joint or track rod end.... not expensive and about an hours labour.

They are good cars worth spending a couple of hundred to keep it on the road, I mean what are you going to replace it with.....you buy a car for 5k and still end up spending money on it....... my E39 Bmw has done 192K and still drives lovely and only ever gets daft advisories on the MOT........... keep it mate they are good old girls and have bullet proof engines
 
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