Odd rattle

[ilikethetuna]

Hi subaru family. I have a weird rattle coming from my 05 GT, 5 speed manual.

 

It only happens when the car is on, at idle, not moving (or very low speed) and my foot is all the way to the floor on the clutch. Its a deep sounding rattle (so not tinny like a heat shield) and maybe lasts for a second or two then stops.

 

Any ideas? Gearbox mount? or clutch master? Clutching at straws? Thanks

 

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[Boxer4turbro]

Thrust bearing perhaps

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[Dre]

Hopefully not your engine thrust bearing.Can you measure the movement at the crank pulley bolt with a dial gauge?Also could be your gearbox input shaft bearing if it’s noisey with the clutch pressed fully down (maybe).Worn clutch release bearing and weak clutch plate springs will rattle with the clutch fully released.

My clutch release bearing or clutch plate springs rattled when it was really cold with the clutch released.As soon as car warmed up noise went away.Motivated me to replace my worn clutch.

 

[ilikethetuna]

Hopefully not your engine thrust bearing.Can you measure the movement at the crank pulley bolt with a dial gauge?Also could be your gearbox input shaft bearing if it’s noisey with the clutch pressed fully down (maybe).Worn clutch release bearing and weak clutch plate springs will rattle with the clutch fully released.
My clutch release bearing or clutch plate springs rattled when it was really cold with the clutch released.As soon as car warmed up noise went away.Motivated me to replace my worn clutch.
 

Thanks Dre. How do I measure that? I hope it's clutch related, and not box related

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[Dre]

You might be better off taking your car to a “good” Subaru mechanic for this one.Really hard to diagnose a problem without seeing the car.

[Loren]

release bearing is my guess. get someone to watch the fork when the pedal is in... see if it's moving about.

actually just look yourself with the pedal out... shouldn't be moving about at all.

Edited September 15, 2018 by Loren