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With the clutch depressed the mechanical link between the engine and tranny is broken, if the noise persists its in the engine.. The rythm of that noise fits perfectly with valvetrain speed.
These engines break valve springs.
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Jake Raby/www.flat6innovations.com
IMS Solution/ Faultless Tool Inventor
US Patent 8,992,089 &
US Patent 9,416,697
Developer of The IMS Retrofit Procedure- M96/ M97 Specialist
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