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heed
Trainee


Joined: 24 Jan 2019
Posts: 72



PostPosted: Thu Apr 25, 2019 9:22 pm    Post subject: Clunk when turning with almost full lock Reply with quote

On my new to me C4S I’m discovering that if I have almost full right lock on, and then pull away I often get what I can only describe as a “clunk” sound. I can’t tell if it’s ns or os. Certainly from the front.

It happens from a stationary position, e.g pulling out of a parallel space. It can also happen at slow speeds, e.g., swinging the car around in a car park.

I’m pretty sure it’s not tyre slip... The sound is quite “hard” and short. Tyre slip that I have experienced is more of a dull sounds, and something you almost “feel” rather than hear.

I took a video of it: https://youtu.be/KMp0Y0JginA

Watching the video I noticed that it looks like I turn a little more just as the clunk sound happens.
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'04 996 C4S, arctic silver, graphite grey
 
  
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rdodger
Monza


Joined: 08 Apr 2018
Posts: 191
Location: Cheshire


PostPosted: Thu Apr 25, 2019 9:47 pm    Post subject: Reply with quote

Difficut to tell from the video but clunks on near full lock would make me think CV joint.
 
  
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deMort
Dijon


Joined: 21 Mar 2015
Posts: 7580
Location: Brighton


PostPosted: Fri Apr 26, 2019 7:09 pm    Post subject: Reply with quote

It kinda sounds like a coil spring is slipping against the stop of the shock absorber .. its a very loud , harsh metal on metal .

I would start with jacking it up , check play left / right and up down , then have a good look at the coil spring and top mount .

just as a favour though .. check all the wheel bolts are tight both sides .
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heed
Trainee


Joined: 24 Jan 2019
Posts: 72



PostPosted: Fri Apr 26, 2019 9:52 pm    Post subject: Reply with quote

deMort - interesting you should say that. One of the queries that my Indy had when they PPId the car was that there was some play in the front top mounts. However, they were both replaced by 9e a couple of years (and only several thousand) miles ago.

I rang Ken at 9e who said that there shouldn’t be any play, and that if the boots were not damaged torn etc then they should be fine.

I chalked it up as a difference of opinion between the Indies when it comes to the definition of play in the mounts.

So maybe there is enough play to cause this? If it’s that, how can it be explained given the mounts are so new?

Anyway, it’s due a service so I guess I’ll ask my Indy to investigate. Gulp.

(I’ll check the wheel bolts with a torque wrench)
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