Knock from front end

4.2 V8 32v Naturally Aspirated - 414 bhp
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mark r
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Joined: Tue May 27, 2014 7:27 am

Knock from front end

Post by mark r » Tue Jul 01, 2014 9:17 pm

Hi guys.
Got a knock when driving onto my drive (which is a incline) from the front, feels like under your feet almost.
It's also there under hard braking, just clunks once.

Thought it was the rear lower control arms so had them replaced, but it's still there.

Anyone experienced this??

Mark
Daytona Grey, black wheels , Miltek, sports cats.

adsgreen
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Re: Knock from front end

Post by adsgreen » Tue Jul 01, 2014 9:29 pm

Twiddle steering wheel back and forth fast - if clocks then steering rack bolt likely
Otherwise drc a potential

mark r
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Re: Knock from front end

Post by mark r » Wed Jul 02, 2014 8:54 pm

Not a drc fault car handles fine, is stable and no leaks, no knocking when moving steering.
Bad under hard breaking and there under hard accel.

No sign of it over pot holes or driving. Only when the load is changing on the front.

Doing my head in now

Mark
Daytona Grey, black wheels , Miltek, sports cats.

adsgreen
Cruising
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Re: Knock from front end

Post by adsgreen » Wed Jul 02, 2014 9:30 pm

Driveshaft?

mark r
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Re: Knock from front end

Post by mark r » Thu Jul 03, 2014 5:57 pm

no there ok too - just had it on some ramps at a local german car specialists, no real movement in anything, but its deffo coming from the front drivers side and is a real bad knock, getting worse now on accelleration too.
Daytona Grey, black wheels , Miltek, sports cats.

adsgreen
Cruising
Posts: 5571
Joined: Mon Aug 16, 2010 9:54 am

Re: Knock from front end

Post by adsgreen » Fri Jul 04, 2014 10:49 am

Anti roll bar bushes / drop links?

Worth checking the undertray fixing are all in place.

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sar
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Location: northeast uk

Re: Knock from front end

Post by sar » Fri Jul 04, 2014 1:24 pm

The torque mount is drivers side front, but literally right at the front just behind bumper.
Engine mount?.
b7rs4 phantom black, titan pack.

tom2009uk
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Re: Knock from front end

Post by tom2009uk » Sat Jul 05, 2014 1:39 pm

Had exactly the same last year, it was the subframe, a new set of bolts torqued correctly sorted it for me

mark r
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Re: Knock from front end

Post by mark r » Mon Jul 07, 2014 6:56 am

Thanks for that tip! I removed those subframe bolts, greased them and torqued them up and most of the knocking has gone!!

The knock under braking and accel is gone, which was disturbing lol.

Still have a slight knock as I back off the drive under full lock. Bit nothing major..

Thanks for your help guys
Daytona Grey, black wheels , Miltek, sports cats.

tom2009uk
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Posts: 146
Joined: Sat Nov 28, 2009 12:54 pm

Re: Knock from front end

Post by tom2009uk » Mon Jul 07, 2014 7:44 pm

Glad that helped!

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