2009 NC 2.0 slow speed knocking issue!

Technical Area Steering & Suspension
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  1. My model of MX-5 is: 2009 NC 2.0 Auto Soft Top
  2. I’m based near: Derbyshire
  3. I’m looking for technical help or recommendations on:
    Hi, everyone out there, I’m hoping someone (as I can’t be the only one to have this problem) will be able to help me find out where this annoying low speed knock is coming from…
    Here’s what I’ve already replaced, with brand new components.
    DROP LINKS ( all round )
    New Springs
    New shocks
    New calipers
    New pads, springs shims etc.
    Fully replaced all the bushes on the front of the vehicle every single one of them.
    Every nut and bolt has also had a torque wrench across it to ensure something hasn’t worked loose.

It’s cost me a small fortune and still as soon as the vehicle moves over any deviation in the road surface a pronounced knock can be heard from both in and out side the vehicle, once travelling over 15-20 mph nothing.

Any suggestions would be welcomed.

Many thanks in advance

2

Bonnet lock needs adjustment??

3

Are all exhaust supports/mounting rubbers still there?

4

Marble in ashtray??:laughing::laughing::laughing:

Everything buttoned down in boot???

5

Shock top mounts replaced?

6

cat/exhaust heat shield loose or rusted brackets?

7

Thanks to all those who have given suggestions, unfortunately, none have cured the issue.
Think I will have to resort the Austin Rover / PSA group Knock and squeak rectification manual where it states:
“ just turn up the radio “ :joy:

8

Is it definitely a knocking or vibration?

Finding these noises is frustrating. As Bally says try the bonnet for rattles and boot lid. I’ve had both on previous MK1/Mk2.
On the Mk3 soft top had a vibrating behind the seats, it was the rear shelf the top drops down onto. The real pain of a knocking was from the Bilsteins on the rear, the top collar rattling over small potholes at low speed. I eventually wanted to have MeisterRs fitted, i did and it solved that issue.
Check behind the plastic panelling in the boot for rattles, there’s a metal cover behind there on the NS to do with to he fuel pipe to tank, it could be loose. Also maybe a loose jack if you have one in the right side cubby.

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9

Fossilised Tesco £1.00 for 4 cheese scones left in boot.
These rascals go real 'ard.
Even when bought.
Sorted.

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10

Had the same

Traced it to a loose bolt on the roof locking mechanism - 20 mins to remove the A post trim and trim across the top of the windscreen

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Is it the tool kit banging around?

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I traced mine (more of a jiggly rattle) to the plastic cover on a rear OE shock top (2008 NC), and thought I had fixed it, while also doing the drop links.

But after a happy trip up to Woodhall Spa this week (and NO distractions there from t’internet thanks to BT line fault), the rattle suddenly returned yesterday, when nearly home on a rough bit of road churned up by HS2 traffic. Sure enough it’s the other side now.

Oh well, at least I know what it is, and I can live with it until I have time to jack it up again.

This post by another member has a picture showing the problem part

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