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Discussion Starter #1
Hi,

I test drove a 159 1.9 JTDM today and loved it. Its had a refurbished gear box so I was listening for noises or any signs of anything untoward when changing gear on the test drive. I noticed that when ever I changed gear particularly 1-4 I could hear a clunk noise when I raised the clutch petal back up. The noise wasn't particularly loud but audible, and sounded like it was central, about a foot or 2 in front of the dash. I figured that this was likely the clutch plates engaging, would that be correct?

I remember hearing this on a previously owned Mondeo ST TDCI but only when I had the windows down. I can't hear it on my current car but I know that has lots of sound proofing around the foot well.

I'm probably being over cautious and picking because the gear box has been replaced but better be safe than sorry. Would you say this was normal?

I appreciate it if people could listen out for this next time they get in their cars.

Other than that I really like the car & would like to look at buying it if all checks out on here.
 
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I'm not an expert but I think you are probably hearing a problem with the DMF(dual mass fly wheel) There is only one clutch plate, it's not like a motorbike clutch with multiple plates. 1st to 4th is a huge change in revs and I would imagine the gearbox is probably ok. The gearbox was more than likely fixed with a new clutch but the DMF is a huge expense that most people would want to avoid if possible.
 

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If its the same noise as mine, mine has done this for the past 50k.... Told it was a characteristic... I had new clutch and dmf, and was quiet for a few weeks but now as noisy as ever.
 

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Discussion Starter #4
Mmm, cheers guys. 2 conflicting answers there, I certainly don't want to replace DMF though. Will be interested to see other peoples thoughts.
 

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Mine does this too. still worries me but I've been told its normal for most cars, just some you cant hear it on. Hope its not a sign of a problem with the DMF or anything else!
 

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I have the same problem. However, i found a way to avoid the clunk noise, and it works perfectly. Just before clutch release, give a little throttle.
I'm sure that its not the DMF, suspect on drive shaft.
 

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Discussion Starter #7
Ah, these last few posts are a bit more comforting.

I have the same problem. However, i found a way to avoid the clunk noise, and it works perfectly. Just before clutch release, give a little throttle.
I'm sure that its not the DMF, suspect on drive shaft.
Is that because when you open the throttle the engine makes more noise so you can't hear it? :lol:

Might go check out another tomorrow. I'll see if that does it.
 
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Like I said I was only guessing, what kind of mileage has your car done? I've had a new clutch and the DMF was fine and we've now done 120k miles!!
 

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Is that because when you open the throttle the engine makes more noise so you can't hear it? :lol:

Might go check out another tomorrow. I'll see if that does it.
I knew that somebody will ask that :lol:
I meant, just a little throttle. I can not explain what is going on in that case, but it works in my case.
As I said, I suspect on the drive shaft
 

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My car had done this since new lol ... its worse between the change between 2nd and 3rd, Im now on 101000 miles and same clutch and dmf.
 

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Mine does this also. It has done 80k and the sound "Clonk" "Slap" "Tak" it is most noticeable in 1-2-3 when engaging clutch. The sound is louder and more easily provoked on hot days. Sometimes it can be provoked when cruising, applying gas and fast depressing it and applying it again. It's like a yoyo effect with "tak" sound". and sometimes nothing....

I suspected engine mounts, gearbox mounts but a an Alfa specialist looked at it and he just told me that I should stop focusing at it and it and it was a characteristic of the car and he wouldn't do anything until clutch needed replacing in future then I should replace the DMF. I asked him about solid DMF he just told me to forget about it as it would destroy the gearbox. So to answer your question yes its normal.... It shouldn't be, but it is :).
 

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Discussion Starter #12
Ah an Alfa characteristic,

I didn't notice it on my car when I test drove it, but it does do it occasionally. Following these posts I 'm not too worried any more (famous last words).
 
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