Vibration/knocking sound

Forum for Engine, Exhaust, Drivetrain, ECU
Mark46
Posts: 105
Joined: Mon Dec 15, 2014 4:39 pm

Re: Vibration/knocking sound

Post by Mark46 » Tue Nov 14, 2017 9:31 pm

The knocking noise from the air box is a well known problem, mine was fixed at the dealers with self tapping screws, there was no charge for this botch......sorry I meant fix.
QQ 2014 (64) 1.5dci n-tec+ (gun metallic)
DRL mod & mud flaps.


chrisw99
Posts: 316
Joined: Mon Jul 11, 2016 10:42 am

Re: Vibration/knocking sound

Post by chrisw99 » Mon Jun 04, 2018 11:02 am

Just got back from a holiday in Cornwall - driving on some very narrow roads with high walls with the windows open reflected all the engine sounds back to me, and I noticed when I pull away under heavy load in 2nd gear I hear a few small rapidfire knocks lasting a second or two.

I drove up and down this road a few times to test it out - If I go up through the gears "normally", it doesn't happen. It's only if I really floor the throttle in 2nd gear.

On normal roads, you cannot hear it at all, it really needs the reflection back from a close wall to hear it - so for all I know it's been doing this for years. I'm suspecting it's just something like the heat shield or the intake pipe rattling more than normal when being floored. But it's tricky to figure it out when 99.9% of the time you don't hear it.
Oct 2014 N-tec+, 1.2 dig-T


Daewar
Posts: 771
Joined: Wed May 25, 2016 6:58 pm

Re: Vibration/knocking sound

Post by Daewar » Mon Jun 04, 2018 11:07 am

I put a tie wrap around the connection between the airbox & intake pipe, problem fixed. Probably worth a shot as there is no damage done like with self tapping screws.
Mark46 wrote:
Tue Nov 14, 2017 9:31 pm
The knocking noise from the air box is a well known problem, mine was fixed at the dealers with self tapping screws, there was no charge for this botch......sorry I meant fix.
J11A 2016 1.6 dci Tekna, AWD.


Duvall1976
Posts: 5
Joined: Mon Jun 25, 2018 1:21 pm
Qashqai Model: Mk.2 Qashqai - J11 (2013–2017)

Re: Vibration/knocking sound

Post by Duvall1976 » Mon Jun 25, 2018 1:44 pm

Ive had two reasons for this on my 65plate 1.2 QQ.
1. there is a nylon washer at the top if the Sus Strutt, its desigend to rotate with the Suss at low speed the "Clunk" I hear when moving the wheel is this simply locking into place...Hmmmm smells off.
2. To fix above problem they simply loosened all the suspension and tada it stopped...again smells funny

Could be the same for you.


chrisw99
Posts: 316
Joined: Mon Jul 11, 2016 10:42 am

Re: Vibration/knocking sound

Post by chrisw99 » Mon Jun 25, 2018 2:01 pm

I'm having the whole engine replaced tomorrow to fix my knocking sound! Turns out it was a little more serious than something a bit loose.
Oct 2014 N-tec+, 1.2 dig-T


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