Slight rattle / judder under low engine load

4.2 V8 40v Naturally Aspirated - 339bhp
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Saint7uk
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Slight rattle / judder under low engine load

Post by Saint7uk » Thu May 26, 2011 11:19 am

Hi all,

I have a slight rattle when pulling away under slight engine loading at about 1.5 k revs. It is most noticeable if pulling away in second or very slowly in first if up a hill etc. It sounds very much like an exhaust baffle rattle but isn't and it will only occur under motion and engine load... any ideas anyone?

(Manual box)

xyber
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Re: Slight rattle / judder under low engine load

Post by xyber » Thu May 26, 2011 7:25 pm

Your bogging the engine down I suspect and the noise is the flywheel clattering. Don't pull away in 2nd.
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Saint7uk
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Re: Slight rattle / judder under low engine load

Post by Saint7uk » Sat May 28, 2011 1:52 pm

Cheers,

I think you are right it is the flywheel clattering. I don't make a habit of pulling off in second, I just noticed when turning a corner at slow speed to get into my steep driveway. I wonder if the clutch alignment is slightly out..1st to 2nd can feel a bit lumpy sometimes if you aren't going hell for leather, almost like the pedal wasn't slightly down..

xyber
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Re: Slight rattle / judder under low engine load

Post by xyber » Sun May 29, 2011 2:52 pm

Early B6s had issues with the dual mass flywheel separating, although you only very rarely hear of anyone actually having problems.
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